Of the following, _____ cannot accommodate more than an octet of electrons.
a. Ni
b. As
c. Y
d. C
e. V
Answers
Of the following, C (Carbon) cannot accommodate more than an octet of electrons.
The other elements - Ni (Nickel), As (Arsenic), Y (Yttrium), and V (Vanadium) - can all accommodate more than an octet of electrons in their valence shells.
The octet rule states that atoms prefer to have eight electrons in their valence shell, which is why Carbon can only accommodate an octet of electrons.
The octet rule is referred as a chemical rule of thumb which reflects the theory that main-group elements tend to bond in such a way that each atom has eight electrons in its valence shell, giving it the same electronic configuration as a noble gas.
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Related Questions
how many electrons are in 40 Ne?
Answers
40 Ne has 10 electrons which consist of 10 protons and 10 neutrons
Neon is a chemical element which is rare gas or noble gas as it has a stable octet electronic configuration, meaning it has 8 valence electrons in its outermost shell.
Neon belongs to group 0/VIII and period 1 of the periodic table.
What is an element?An element is a substance which takes part in a chemical reaction. There are different classes of elements which includes the metals, nonmetals and the metalloids.
So therefore, 40 Ne has 10 electrons which consist of 10 protons and 10 neutrons.
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Molarity of Kool Aid solutions can be calculated by comparing the concentrations of Kool Aid powder and sugar added to a given volume of water. The molar mass of Kool Aid will be the same as that of sugar for our purpose. The molecular formula for sugar is C12H22O11- Your objective for this lab will be to calculate the molarity of Kool Aid desired based on package directions. You will then be provided two concentrated Kool Aid solutions. You will use dilution calculations to determine the amount of water and concentrated solution you will need in order to prepare 65 mL of the desired molarity.
Calculate the molarity of Kool Aid desired based on the following information from the package directions.
1 package Kool Aid powder = 4. 25 grams 1 cup sugar = 192. 00 grams
2. 00 quarts of water (1. 06 quarts = 1 liter)
Answers
The amount of concentrated solution needed is (0.286 M)(65 mL) / C M, and the amount of water needed is 65 mL minus the volume of the concentrated solution.
To calculate the molarity of Kool Aid desired, we need to determine the number of moles of Kool Aid powder and sugar in the package. Since the molecular formula for sugar is C12H22O11, we can calculate its molar mass as follows:
Molar mass of C12H22O11 = (12 * 12.01) + (22 * 1.01) + (11 * 16.00)
= 144.12 + 22.22 + 176.00
= 342.34 g/mol
Given that the package contains 4.25 grams of Kool Aid powder, we can calculate the number of moles of Kool Aid powder using its molar mass:
Number of moles of Kool Aid powder = Mass / Molar mass
= 4.25 g / 342.34 g/mol
≈ 0.0124 mol
Similarly, for the sugar, which has a molar mass of 342.34 g/mol, we can calculate the number of moles of sugar using its mass:
Number of moles of sugar = Mass / Molar mass
= 192.00 g / 342.34 g/mol
≈ 0.5612 mol
Now, to calculate the molarity of the desired Kool Aid solution, we need to determine the volume of water. Given that 1.06 quarts is equal to 1 liter, and we have 2.00 quarts of water, we can convert it to liters as follows:
Volume of water = 2.00 quarts * (1.06 liters / 1 quart)
= 2.12 liters
To find the molarity, we use the formula:
Molarity (M) = Number of moles / Volume (in liters)
Molarity of Kool Aid desired = (0.0124 mol + 0.5612 mol) / 2.12 L
≈ 0.286 M
To prepare 65 mL of the desired molarity, we can use dilution calculations. We need to determine the volume of concentrated solution and the volume of water needed.
Let's assume the concentration of the concentrated Kool Aid solution is C M. Using the dilution formula:
(C1)(V1) = (C2)(V2)where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.
Given that C1 = C M and V1 = V mL, and we want to prepare a final volume of 65 mL (V2 = 65 mL) with a final concentration of 0.286 M (C2 = 0.286 M), we can rearrange the formula to solve for the volume of the concentrated solution:
(C M)(V mL) = (0.286 M)(65 mL)
V mL = (0.286 M)(65 mL) / C M
So, the amount of concentrated solution needed is (0.286 M)(65 mL) / C M, and the amount of water needed is 65 mL minus the volume of the concentrated solution.
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Suppose that you are the quality engineer in a company that manufactures a certain chemical product. This product is obtained from the chemical reaction of two components under a high temperature environment, and the level of contaminant of the resulting product is the main parameter subjected to quality control. After a thorough statistical analysis on the data collected from this process, you found that the process variability follows the normal distribution, in which the average contaminant level in the product, , in parts per million (ppm) is a function of other variables of the process given by the following equation:
student submitted image, transcription available belowstudent submitted image, transcription available belowin which P1 is the average purity index of the component 1, P2 is the average purity index of the component 2, and T is the temperature at which the chemical reaction is processed in °C. For the standard deviation of the contaminant level in the product, c, also in parts per million, you found the following equation:
c = 1500P1 2 + 1700P2 2 + 2000P1P2T
in which P1 is the standard deviation of the purity index of the component 1, P2 is the standard deviation of the purity index of the component 2, and T is the standard deviation of the chemical reaction temperature. Currently, the product is being processed with components 1 and 2 having average purity levels of 0.80 and 0.85, respectively. To sustain the chemical reaction, the average temperature of the process must be set to a minimum value of 120°C. Additionally, the standard deviation for the purity index of both components is 0.1, and the standard deviation of the temperature is 0.5°C. In one week, you will have a meeting with a new costumer, who is interested on your product but not sure about its quality standards.
a) If your new customer has established a target value for the contaminant level in the product of 380 ppm, is the current process accurate enough to meet this target value? If not, propose two modifications in the process to meet the target value. Justify your proposals based on numbers. Take into consideration that the maximum purity index possible for the components is 1, and that the maximum reaction temperature allowable is 250°C for safety reasons.
b) Your customer also has a strict requirement that 99% of the products should have a contaminant level between 350 and 410 ppm. Is the current process capable (or precise enough) to meet this requirement? If not, propose two additional modifications in the process to meet the customer requirements. Justify your proposals based on numbers.
Answers
The current process is not accurate enough to meet the target contaminant level of 380 ppm. Two modifications can be proposed to improve the process.
Firstly, increasing the average purity index of component 1 (P1) to 0.85 will reduce the contaminant level. Secondly, reducing the average temperature (T) to the minimum value of 120°C will also decrease the contaminant level. These modifications can be justified based on the given equations for the contaminant level and standard deviation.
In the equation for the contaminant level, a higher P1 value will result in a lower contaminant level. By increasing P1 from 0.80 to 0.85, the contaminant level will decrease. Similarly, by reducing the average temperature from its current value, the contaminant level can be further reduced.
To meet the customer's requirement of 99% of the products having a contaminant level between 350 and 410 ppm, additional modifications are needed. Firstly, decreasing the standard deviation of the purity index for both components (P1 and P2) will reduce the process variability and bring the contaminant levels closer to the target range.
Secondly, reducing the standard deviation of the temperature (T) will also help in reducing the variability of the contaminant levels. These modifications will improve the precision of the process and increase the likelihood of meeting the customer's requirement.
In conclusion, the current process is not accurate enough to meet the target contaminant level and the precision requirement of the customer. Modifying the average purity index of component 1, average temperature, and the standard deviations of purity indices and temperature can improve both accuracy and precision.
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HELP ME PLSSSS!!!!!!!
You build a circuit to power a hot plate. The hot plate can quickly heat up and boil a pot full of water. You add a second hot plate to the same circuit. Both plates heat up, but neither plate gets hot enough to boil water. Explain why the modified circuit can no longer boil water. (1 point)
O The hot plates use electrical energy to generate heat. By adding a second hot plate, you have made an open circuit. This means the path of electricity from the energy source to the hot plates is interrupted.
O The hot plates use electrical energy to generate heat. If the plates do not generate enough heat to boil water, both loads must be broken.
O The hot plates use electrical energy to generate heat. If the plates do not generate enough heat to boil water, the energy source of the modified circuit must be broken.
O The hot plates use electrical energy to generate heat. When a second load is added, electrical energy from the circuit is now shared between two hot plates. This means each hot plate receives less electrical energy and cannot generate as much heat.
Answers
The modified circuit can no longer boil water because: "The hot plates use electrical energy to generate heat. When a second load is added, electrical energy from the circuit is now shared between two hot plates.Therefore, the correct option is D.
What is electrical energy?Electrical energy is a form of energy that results from the movement of charged particles, such as electrons. It is the energy that is transferred when an electric current flows through a conductor, and can be converted into other forms of energy, such as heat, light, or mechanical energy.
When a second load is connected, the circuit's electrical power is now split between two hot plates. Because of this, each hot plate uses less electricity and cannot produce as much heat.Therefore, the correct option is D.
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The question is incomplete, but most probably the complete question is,\
You build a circuit to power a hot plate. The hot plate can quickly heat up and boil a pot full of water. You add a second hot plate to the same circuit. Both plates heat up, but neither plate gets hot enough to boil water. Explain why the modified circuit can no longer boil water. (1 point)
A. The hot plates use electrical energy to generate heat. By adding a second hot plate, you have made an open circuit. This means the path of electricity from the energy source to the hot plates is interrupted.
B. The hot plates use electrical energy to generate heat. If the plates do not generate enough heat to boil water, both loads must be broken.
C. The hot plates use electrical energy to generate heat. If the plates do not generate enough heat to boil water, the energy source of the modified circuit must be broken.
D. The hot plates use electrical energy to generate heat. When a second load is added, electrical energy from the circuit is now shared between two hot plates. This means each hot plate receives less electrical energy and cannot generate as much heat.
Which trends are observed as each of the elements within group 15 on the periodic table is considered in order from top to bottom?.
Answers
Trends that are observed as each of the elements within group 15 on the periodic table which is considered in order from top to bottom is:
Their metallic properties increase as well as their atomic radii increase.
What is periodic table?The chemical elements are arranged in rows and columns on what is known as the periodic table, also known as the periodic table of the (chemical) elements. It is frequently used in chemistry, physics, and other sciences and is frequently referred to as an icon of chemistry.
The table is divided into four blocks, which are roughly rectangular regions. The table's columns are referred to as groups and its rows as periods. The periodic table's elements in the same group have similar chemical properties.
The periodic table shows trends, with nonmetallic character (keeping their own electrons) increasing from left to right across a period and from down to up across a group, and metallic character (surrendering electrons to other atoms) increasing in the opposite direction.
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The offered statement states that both their atomic radii and metallic characteristics rise.
What does the word "element" mean?refers to a straightforward material that cannot be divided into smaller components or transformed into another chemical in chemistry. An atom, which is made up of protons, neutrons, and electrons, is the fundamental unit of an element. An element's atoms all have the same amount of protons.
Who defined an element first?French scientist Antoine Laurent Lavoisier (1743–1744) was the first to define an element in a way that was practical for experiments. According to his definition, an element is a fundamental type of matter that could undergo chemical transformation into a simpler material.
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Fill in the blank: An object is most likely to sink in water if
Answers
Answer:
An object floats when the weight force on the object is balanced by the upward push of the water on the object. ... If the weight force down is larger than the upward push of the water on the object then the object will sink. If the reverse is true then the object will rise – rising is the opposite of sinking.
Explanation:
Take what you will from this.
Answer:
Wood, rubber, plastic, egg, palm leaves, styrofoam, and some types of natural rocks too!
Ionic compounds are held together with ionic bonds between ions. The ions are formed when valence electrons are
Answers
Answer: Electrovalent bonds are produced when electrons are transferred from atoms of one element to atoms of another element, producing positive and negative ions. The bond which is formed by the transfer of electrons between the atoms is called electrovalent bond or ionic bond. Electrovalent bonds are only formed between metals and non-metals. Electrovalent bonds are not formed between two non-metals.
In simple words electrovalent bond involves the transference of a certain number of electrons to another dissimilar atom which has a tendency to gain electrons so that both acquire stable inert gas configurations. The electrostatic attraction always tends to decrease the potential energy. Hence, the potential energy of the system is much less than it was before the formation of an ionic bond.
Explanation: An Ionic bond is the bond formed by the complete transfer of valence electron to attain stability.
This type of bonding leads to the formation of two oppositely charged ions – positive ion known as cations and negative ions are known as anions.
The presence of two oppositely charged ions results in a strong attractive force between them. This force is an ionic or electrovalent bond.
Ionic bonds form between atoms with large differences in electronegativity, whereas covalent bonds formed between atoms with smaller differences in electronegativity.
The compound formed by the electrostatic attraction of positive and negative ions is called an ionic compound.
How many ¹H NMR signals does 2-chloro-3-methyl-2-butene exhibit? Assume both allylic methyl show as chemically equivalent in the NMR. 1 2 3 4 5
Answers
There will be 3 H NMR signals for 2-chloro-3-methyl-2-butene.
The variety of protons present in a molecule is represented by the number of NMR signals. The illustration we used to explain NMR spectroscopy is as follows: Five signals on the spectrum signify five different types of protons. can be calculated simply by counting the number of unique hydrogens on one side of the symmetry plane. Nuclear magnetic resonance is used in proton nuclear magnetic resonance (1H NMR, proton NMR, or hydrogen-1 NMR), which uses hydrogen-1 nuclei within a substance's molecules to determine the structure of those molecules. Using NMR technique one can analyze the molecular structure of a molecule by observing the nuclear spins in electric field.
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what is yeast? what kind of organism is it?
Answers
Answer:
fungi
Yeasts are eukaryotic organisms that are included in a group of organisms called “fungi,” which also includes molds and mushrooms. Yeasts can have both positive and negative effects on fermented products consumed by humans and animals.
Explanation:
Answer: Fungi
Explanation:
Yeasts are eukaryotic organisms that are included in a group of organisms called “fungi,” which also includes molds and mushrooms. Yeasts can have both positive and negative effects on fermented products consumed by humans and animals.
One half of Barium-139 decays into another element after 86 minutes. The 86 minutes is referred to as this element's...
Select one:
a. half-life.
b. radioactive phase.
c. time zone.
d. quarter time
Answers
Answer:
d)quater time
Explanation:
that's my ans
True or false? You can follow the progress of a reaction that produces a gas using a sensitive mass balance, because the mass of the reaction vessel increases as the gas is produced.
Answers
By using a sensitive mass balance, it is indeed possible to track the progress of a reaction that generates a gas, so it is True. This is due to the principle of conservation of mass, which states that mass is neither created nor destroyed during a chemical reaction.
A sensitive mass balance can accurately measure even small changes in mass. By continuously monitoring the mass of the reaction vessel, any increase in mass can be attributed to the production of the gas. This provides a quantitative measurement of the reaction's progress over time.
The sensitivity of the mass balance is crucial in this context, as it allows for the detection of minute changes in mass. The precision of the instrument ensures that the measurements are reliable and can be used to follow the kinetics of the reaction.
This method is particularly useful for reactions that generate gases as one of the products, such as the decomposition of certain compounds or the release of carbon dioxide during fermentation processes.
In conclusion, a sensitive mass balance can be followed to track the progress of a gas-producing reaction by measuring the increasing mass of the reaction vessel, which reflects the production of gas over time.
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I gotta pick 4 last question to pass :,) pls help:>
whoever answers first will be marked brainliest unu
Answers
Answer:
Explanation:
heat up the solvent
increse the pressurre of the mixture
add more solute
agitate
Question 10
Which of the following is a sign that you might be in an extremely unsafe situation?
A) you see frayed electrical cords on the machine you are asked to use
B) other workers are getting burned on the fryer that you are supposed to use
C) you are shown a forklift truck - something you have never operated before -
and told to move a heavy load of materials across the warehouse floor
D) only a) and c)
E) all of a), b), and c)
Answers
Answer:
Here it would be A,B and C because all the examples are violating safety precautions. They are all examples of un safe signs.
Hope this helps
Explanation:
When a solid compound is formed from chemicals that are in solution, it is called a
Answers
Answer:
Precipitate
Explanation:
Precipitate usually forms when two or more chemicals are added and a solid deposits at bottom of test tube or floats as chunky solid.
For example, when you put AgNO3(aqueous) + KCl(aqueous) —–> AgCl(precipitate) + KNO3(aqueous). You'll see a white percipitate form which AgCl.
Here's a pic of diff colors of ppt you can make
What is the pH of a 2500. ml solution that contains 10.4 g of calcium hydroxide. Show all work and round answers to significant figures.
Answers
ANSWER
The pH of the solution is 12.75
EXPLANATION;
Given that;
The volume of the solution is 2500mL
The mass of calcium hydroxide is 10.4g
Follow the steps below to find pH of the solution
Step 1; Convert the volume to L
Recall, that 1mL is equivalent to 0.001L
Let the volume of the solution be x
\(\begin{gathered} \text{ 1mL }\rightarrow\text{ 0.001L} \\ \text{ 2500mL }\rightarrow\text{ xL} \\ \text{ cross multiply} \\ \text{ 1mL }\times\text{ xL }=0.001L\text{ }\times\text{ 2500mL} \\ \text{ isolate x} \\ \text{ x = }\frac{0.001L\times2500\cancel{mL}}{1\cancel{mL}} \\ \text{ x = 0.001 }\times\text{ 2500} \\ \text{ x = 2.5L} \end{gathered}\)Step 2; Find the mole of calcium hydroxide using the formula below
\(\text{ mole }=\text{ }\frac{\text{ mass}}{\text{ molar mass}}\)Recall, that the molar mass of calcium hydroxide is 74.093 g/mol
\(\begin{gathered} \text{ mole }=\text{ }\frac{\text{ mass}}{\text{ molar mass}} \\ \\ \text{ mole }=\text{ }\frac{\text{ 10.4}}{\text{ 74.093}} \\ \text{ mole = 0.140 mol} \end{gathered}\)Step 3; Find the molarity of calcium hydroxide
\(\begin{gathered} \text{ molarity = }\frac{\text{ mole }}{\text{ volume}} \\ \\ \text{ molarity = }\frac{0.140}{2.5} \\ \text{ molarity = 0.056M} \end{gathered}\)Since calcium hydroxide is a base, then calculate the pOH of calcium hydroxide
\(\text{ pOH = - log \lbrack OH}^-\text{ \rbrack}\)\(\begin{gathered} \text{ \lbrack OH}^-\text{ \rbrack = 0.056M} \\ \text{ pOH = -log 0.056} \\ \text{ pOH = 1.25} \end{gathered}\)Step 5; Find the pH of the solution
Recall, that pOH + pH = 14
\(\begin{gathered} \text{ pOH }+\text{ pH }=\text{ 14} \\ \text{ 1.25 }+\text{ pH }=\text{ 14} \\ \text{ subtract 1.25 from both sides of the equation} \\ \text{ 1.25 - 1.25 + pH = 14 - 1.25} \\ \text{ pH = 12.75} \end{gathered}\)Therefore, the pH of the solution is 12.75
Balance these equations : ) ……H 2 + …..O 2 —> …. H 2 O…..FeCl 2(s) + ….. H 2 O (1)….> ….FeO (s) + …. HCl(aq)…..C 4 H 8(g) + …..O2(g)……> ….CO 2(g) + ….H 2 O (l)…..NaHCO 3(s) ….> ……Na 2 CO 3 + ….. CO 2(g) +…..H 2 O (g)…..NaOH (aq) + …….NgCl (aq) ….> …..NaCl (aq) + ….Mg(OH) 2(s)
Answers
In order to properly balance an equation, we need to make sure that the same amount of elements on the reactants side matches the number of elements on the products side, we can do that by increasing the number in front of each molecule, the so called stoichiometric coefficient. In the reaction from the question we can properly balance by adding the following stoichiometric coefficients
1. 2 H2 + O2 -> 2 HO2
2. FeCl2 + H2O -> FeO + 2 HCl
3. C4H8 + 6 O2 -> 4 CO2 + 4 H2O
4. ?
5. 2 NaOH + MgCl2 -> 2 NaCl + Mg(OH)2
Between OH an C=O, which is the strong nucleophile and the strong electrophile?
Answers
Between OH and C=O, the strong nucleophile is OH and the strong electrophile is C=O.
How to order the strength of a nucleophile and electrophile?
1. OH (hydroxide ion) is a strong nucleophile because it has a negative charge on the oxygen atom, which allows it to donate its lone pair of electrons to an electrophilic center.
2. C=O (carbonyl group) is a strong electrophile because the carbon atom has a partial positive charge due to the electronegativity difference between carbon and oxygen atoms in the double bond. This makes the carbon atom highly susceptible to nucleophilic attack.
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Which type of graph is best used to show how a measured quantity changes over time?
Box and whisker plot
Line graph
Circle graph
Histogram
Answers
Low, gray, layered clouds that cover the sky and bring steady rain are O A. cumulus O B. cirrus O C. cumulonimbus OD. nimbostratus
Answers
Answer:
D Nimbostratus
Explanation:
In the compound nickel(II) sulfide, there is always 58.7 g of nickel for every 32.1 g of sulfur. What is the simplified ratio of
nickel to sulfur?
Answers
answer: 1.83 to 1
or at least that’s what i got
What conditions should Muscarinic Agonists NOT be used with?
Answers
Muscarinic agonists are a class of drugs that stimulate the activity of the parasympathetic nervous system by binding to muscarinic acetylcholine receptors.
They should not be used in patients with certain medical conditions such as glaucoma, urinary tract obstruction, or gastrointestinal obstruction. In glaucoma, muscarinic agonists can cause pupil constriction and increase intraocular pressure, worsening the condition.
In urinary or gastrointestinal obstruction, muscarinic agonists can increase smooth muscle contraction, exacerbating the obstruction.
Muscarinic agonists should also be used with caution in patients with asthma or chronic obstructive pulmonary disease (COPD) as they can cause bronchoconstriction and worsen respiratory symptoms. Patients with a history of allergy to muscarinic agonists should also avoid these drugs.
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An Exothermic reaction is
o when energy is released
O when energy is absorbed
O When energy is not released or absorbed
O No answer text provided.
Answers
What is the percent yield for the reaction below when 544.5 g SO2 and 160.0 g O2 produce 382.0 g SO3? 2SO2(g) + O2(g) 2SO3(g) A. 56.1% B. 54.2% C. 23.9% D. 47.7%
Answers
Answer:
Option A.
Explanation:
Balanced equation is:
2SO₂ (g) + O₂(g) → 2SO₃(g)
First of all, we need to determine the limiting reagent. We convert mass to moles:
544.5 g . 1 mol / 64.06g = 8.5 moles of sulfur dioxide
160 g . 1mol / 32g = 5 moles of oxygen
Ratio is 1:2. 1 mol of oxygen needs 2 moles of sulfur dioxide
5 moles of oxygen may react to (5 . 2) /1 = 10 moles of SO₂
We only have 8.5 moles of SO₂ but we need 10 moles. In conclussion limiting reagent is SO₂.
Ratio is 2:2. 2 moles of SO₂ can prdouce 2 moles of SO₃
Then 8.5 moles of SO₂ must produce 3 moles of SO₃
We convert mass to moles, to determine the theoretical yield (100 % yield reaction) → 8.5 mol . 80.06 g /mol = 680.51 g
Formula for percent yield is: (Produced yield / Theoretical yield) . 100
(382 g / 680.51g) . 100 = 56.1 %
Which blocks will move under these conditions and explain
Answers
Answer:
Correct: B
Explanation:
The first block wont move because:
Σf=3-3=0N.
The second block will move because:
Σf:5-3=2N (direction to the right).
The third block will move because:
Σf=3N (direction to the right).
Kendall has an empty graduated cylinder with markings and an identical graduated cylinder partway filled with water. She also has a balance and a marble
Answers
Answer:
She can measure the volume and mass of the marble, the volume and mass of the water, and the mass of the graduated cylinder.
Explanation:
Graduated cylinders are used to measure volume, hence she can be able to measure the volume of the marble from the volume of water displaced. The measuring cylinder is also used to measure the volume of the water. The balance is used to measure the mass of the water and mass of the marble.
which statement supports the main ideas of the law of conservation of mass? responses the reactants in a chemical reaction are the same as the products. the reactants in a chemical reaction are the same as the products. the masses of the reactants are less than the masses of the products. the masses of the reactants are less than the masses of the products. the masses of the reactants are equal to the masses of the products. the masses of the reactants are equal to the masses of the products. the masses of the reactants are greater than the masses of the products.
Answers
Answer:
the first statement is correct...
it only supports the main idea of the law of conservation of mass...
hope I can help you...
What do
Electrons help form
And
Neutrons help keep
Answers
What is the formula for nickel || dichromate
Answers
Answer: Cr2NiO7 is the molecular formula for nickel II dichromate.
Does changing the number of protons change the identity of the element you have built ?
Answers
Answer: Yes.
Explanation:
the number of protons in the nucleus determines an element's identity. Chemical changes do not affect the nucleus, so chemical changes cannot change one type of atom into another. The number of protons in a nucleus does change sometimes, however. The identity of the atom, therefore, changes.
Students are investigating the differences in open and closed systems. They heated 2 containers of water. They recorded their results in the tables shown.
Two tables.Short description, Two tables.,Long description,
Container 1
Before After Mass of Container and Contents in grams 200 150 Volume of Water in milliliters 100 50
Container 2
Before After Mass of Container and Contents in grams 200 200 Volume of Water in milliliters 100 50
Question
What can the students conclude from the results of their investigation?
Answer options with 4 options
A.
Container 1 is a closed system because a gas was produced. Gases do not have mass.
B.
Container 1 is an open system because a gas was produced. Gases make things lighter.
C.
Container 2 is an open system because the volume changed even though the mass did not change.
D.
Container 2 is a closed system because the mass did not change even though the volume changed.
Answers
Container 2 is a closed system because the mass did not change even
though the volume changed.
What is a Closed system?A closed system is the type of system which prohibits the transfer of
matter in and out the system.
In a closed system , the mass of the matter present is always the same
regardless of the changes which occurred which is why option D is the
most appropriate option.
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