Answers
Answer:
4.22 g/mL
Explanation:
First we calculate the mass of the solid via mass difference:
Mass of solid = 9.441 g - 1.005 g = 8.436 gThen we calculate the volume of the solid, once again by difference:
Volume of solid = 5.45 mL - 3.45 mL = 2.00 mLFinally we calculate the density in g/mL:
Density = 8.436 g / 2.00 mL = 4.22 g/mLThe density of an irregular solid will be "4.96 g/mL".
According to the question,
→ The Mass of solid will be:
= \([(Mass \ of \ solid+ Weighing \ vessel)-(Mass \ of \ weighing)]\)
By substituting the values, we get
= \(9.441-1.005\)
= \(8.436 \ g\)
→ The Volume of solid will be:
= \([(Volume \ of \ liquid \ in \ grad. \ cylinder+Solid)-(Volume \ of \ grad. \ cylinder)]\)
= \(5.15 - 3.45\)
= \(1.70 \ mL\)
hence,
→ The density of irregular solid will be:
= \(\frac{Mass}{Volume}\)
= \(\frac{8.436}{1.70}\)
= \(4.96 \ mL\)
Thus the above is the correct answer.
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Related Questions
Give four method of acid preparation and give two reactions to support your answers
Answers
(i) Hydrogen chloride gas is prepared by treating Sodium chloride with concentrated sulphuric acid. The HCl gas is passed through a drying agent to remove moisture where concentrated sulphuric acid plays the role of dehydrating agent as well.
(ii) NaCl+H2 SO4 →NaHSO 4 +HCl(g)
Hope it helps :)
Second example : when acetic acid is heated with phosphorus pentachloride , acetyl chloride is obtained. In this reaction : COOH group is converted to COCI group. The side products are phosphorus oxychloride and HCI
Third example: Ethanol and acetic acid react to form ethyl acetate and water according to the equation: C2H5OH + CH3COOH
CH3COOC2H5 + H2O when 2 moles each of ethanol and acetic acid are allowed to react at 100 degrees Celsius in a sealed tube, equilibrium is established when 2/3 of a mole of each of the reactants remains.
In the following description of Fe, some of the properties are physical and some are chemical. Identify which of the properties are chemical.
a. Iron has a density of 7.87 grams per cubic centimeter, melts at 1538 o C and boils at 2862 o C .
b. Iron forms complexes with molecular oxygen in proteins like hemoglobin and myoglobin
c. Iron rusts readily in moist air.
d. Iron powder dissolves in an acidic solution with the evolution of a gas.
e. Iron (Fe) is a lustrous silver gray metal.
Answers
Answer:
b. Iron forms complexes with molecular oxygen in proteins like hemoglobin and myoglobin
c. Iron rusts readily in moist air.
d. Iron powder dissolves in an acidic solution with the evolution of a gas.
Explanation:
The chemical properties of an element is the property of the element that is being noticed during or after a chemical reaction. The chemical properties can only be observed when the chemical composition of the compound is about to be changed or is changed. From the question the propeties that are chemical are:
Iron forms complexes with molecular oxygen in proteins like hemoglobin and myoglobin
Iron rusts readily in moist air.
Iron powder dissolves in an acidic solution with the evolution of a gas.
The remaining properties are physical properties (they can be measured and shows the physical state)
Which intermolecular force(s) do the following pairs of molecules experience? (Consider asking yourself which molecule in each pair is dominant?)
Answers
The Fischer projection given here is for L-enantiomer and ketopentose. Option B is correct, as there is a ketone group present in the carbohydrate monomer. Carbohydrate can have an aldehyde or ketone as a functional group.
What is a carbohydrate?
Carbohydrate monomer is a single unit that can either have an aldehyde functional group called aldose or a ketone functional group called ketose. Here in the given diagram, the monomer has a ketone group (C=O) and has five carbons, so it is considered a keto pentose. Carbohydrates are classified into L and D forms based on their OH group, and this L and D form differs from the "l" and "d" form (classified on the direction of movement around the plane polarized light).
Hence, this given diagram is L-enantiomer and keto pentose, which is option B.
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A 50.0 mL sample containing Ni+2 was treated with 25.0 mL of .050 M EDTA to complex all of the Ni+2 and leave some excess EDTA in solution. the excess EDTA was then titrated with .050 M Zn+2, requiring 5.00 mL to reach equivalence point. What was the concentration of Ni+2 in the original solution? (EDTA forms complexes with metals in a 1:1 stoichiometry)
Answers
In an experiment, the molar mass of the compound was determined to be 118.084 g/mol. What is the molecular formula of the compound?
Answers
Answer:
Succinic acid
Explanation:
The most common possibility is succinic acid
As it has decimals after whole no till hundredth it contains OH and C in most of the cases .
Let's check for succinic acid
C4H_6O_64(12)+4(16)+664+48+6118uYes approximately equal
Molecular formula is.
(CH_2)_2(CO_2H)_2
Balance c5h12+02+co2+h20
Answers
Answer: you can't really balance it doesn't make anything
Explanation:
What is the average experimental volume per mole of carbon dioxide calculated for sodium carbonate and sodium bicarbonate?
Answers
Answer: 24.356L/mol.
Explanation: Hence, the average experimental volume per mole of carbon dioxide for sodium carbonate and sodium bicarbonate is 24.356L/mol.
If I have 25 moles in a 3.0 M solution of HCI, how many liters do I have?
Answers
Volume = number of moles / molarity
= 25/3
= 8.3333 L
what are thetypes of luminous flame
Answers
Types of luminous flames:
1. Yellow Luminous Flame
2. Smoky Luminous Flame
3. Orange Luminous Flame
4. Blue Luminous Flame
Luminous flames are characterized by their visible glow, which is caused by the incomplete combustion of fuel. The presence of soot particles in the flame causes the emission of light. There are different types of luminous flames, which can be classified based on their fuel composition and burning conditions. Here are some common types of luminous flames:
1. Yellow Luminous Flame: This is the most common type of luminous flame, often seen in open fires, candles, and gas stoves. It appears yellow due to the presence of soot particles in the flame. Yellow flames indicate incomplete combustion of hydrocarbon fuels, such as methane, propane, or natural gas. The high carbon content in these fuels leads to the formation of soot, which emits visible light.
2. Smoky Luminous Flame: This type of flame is characterized by a significant amount of black smoke and soot production. It is commonly observed in poorly adjusted or malfunctioning burners or engines. The excessive presence of unburned fuel in the flame results in incomplete combustion and the emission of dark smoke particles.
3. Orange Luminous Flame: An orange flame indicates a higher combustion temperature compared to a yellow flame. It is often seen in more efficient burners or when burning fuels with a higher carbon content, such as oil or diesel. The higher temperature helps in burning more of the carbon particles, reducing the amount of soot and making the flame appear less yellow.
4. Blue Luminous Flame: A blue flame is typically associated with complete combustion. It indicates efficient burning of fuel, resulting in minimal soot formation. Blue flames are commonly observed in gas burners or Bunsen burners. The blue color is a result of the combustion of gases, such as methane, in the presence of sufficient oxygen.
It's important to note that the luminosity of a flame can vary depending on factors such as fuel-air mixture, combustion temperature, and the presence of impurities. Achieving complete combustion and minimizing the production of soot is desirable for efficient and cleaner burning processes.
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Based on Chromium's position on the periodic table, which statement describes the element
chromium (Cr), atomic number 24?
Answers
Answer:
C. chromium is a metal that is less reactive than sodium.
Explanation:
Hello.
Given the options:
A. chromium is a nonmetal and therefore a good conductor of heat and electricity .
B. chromium is a metal that is more reactive than potassium .
C. chromium is a metal that is less reactive than sodium .
D. chromium is a noble gas that is not reactive.
In this case, since chromium is in period 4 group VIB we infer it is a transition metal which slightly reacts with acids and poorly reacts with oxygen and other oxidizing substances. Thus, in comparison with both sodium and potassium which are highly reactive even with water as they get on fire, we can say that it is less reactive than both potassium and sodium, therefore, answer is: C. chromium is a metal that is less reactive than sodium.
Best regards.
In the modern periodic table shown in Figure 1 above, find the element named lead (Pb). How many protons do atoms of lead have? To which class of elements does lead belong?
Answers
Answer:
82 protons and lead is metal
Explanation:
15. What volume of water must be added to 300 mL of 0.75 M HCl to dilute the solution to
0.25 M?
Answers
Known :
V1 = 300 mL
M1 = 0.75 M
M2 = 0.25 M
Solution :
M1 • V1 = M2 • V2
(0.75 M) • (300 mL) = (0.25 M) V2
V2 = 900 mL
Water add to this solution is :
∆V = V2 - V1
∆V = 900 - 300
∆V = 600 mL
The answer is 600 ml of water needs to be added to change the concentration to 0.25 M.
What is Dilution ?A dilution is when you have a solution of a certain concentration and you add more solvent to decrease the concentration.
If you are adding more solvent, the volume of the whole solution is going to increase as the concentration of the solution decreases.
You can solve for the concentration or volume of the concentrated or dilute solution using the equation:
M₁V₁ = M₂V₂,
where M₁ is the concentration in molarity (moles/Liters) of the concentrated solution,
V₁ is the volume of the concentrated solution,
M₂ is the concentration in molarity of the dilute solution (after more solvent has been added), and
V₂ is the volume of the dilute solution.
It is given that
V₁ = 300 ml
V₂ = ?
M₁= 0.75 M
M₂ = 0.25 M
Substituting the values in the equation
0.75 * 300 = 0.25 * V₂
V₂= 900 ml
So 900 - 300 , 600 ml of water needs to be added to change the concentration to 0.25 M.
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if 9.00g grams of gas are enclosed in a 50.00 L vessel at 273.15K and 2.000 atmospheres of pressure , what is the molar mass of the gas? what gas is this?
Answers
Answer: 4.88 g/mol. and helium
Explanation:
To find the molar mass of the gas, we can use the ideal gas law equation which is PV=nRT where:
P = pressure = 2.000 atm
V = volume = 50.00 L
n = number of moles
R = gas constant = 0.08206 L·atm/K·mol
T = temperature = 273.15 K
First, we need to find the number of moles of the gas:
PV = nRT
n = PV/RT
n = (2.000 atm)(50.00 L)/(0.08206 L·atm/K·mol)(273.15 K)
n = 1.844 mol
Now, we can find the molar mass of the gas by dividing its mass by the number of moles:
molar mass = mass/number of moles
mass = 9.00 g
molar mass = 9.00 g/1.844 mol
molar mass = 4.88 g/mol
Therefore, the molar mass of the gas is 4.88 g/mol.
To determine what gas this is, we can compare the molar mass of the gas to the molar masses of known gases. The molar mass of 4.88 g/mol is closest to that of helium (4.00 g/mol). Therefore, this gas is most likely helium.
why do some materials have a density range and some are definite numbers?
Answers
9. What do the results tell you about your hypothesis(es)?
Someone help please
Answers
Explanation:
A hypothesis is a scientific guess into a phenomenon. Results can either support a hypothesis or falsify them.
The findings that results from an experiment are the results on which the claim on a hypothesis is predicated.
When results conflicts with the hypothesis statement, such a conjecture can no longer hold true and therefore, it would be modified or completely discarded. If results supports a hypothesis, then the conjecture is accepted and passed on to further scientific procedure.What will the molarity of a perchloric acid solution be if 13.75 mL of 0.02486 M barium hydroxide solution is required to neutralize 0.02000 L of the perchloric acid solution? (Do not forget to include the balanced chemical equation).
Answers
The balanced chemical equation for the reaction between perchloric acid (HClO4) and barium hydroxide (Ba(OH)2) is:
2HClO4 + Ba(OH)2 → Ba(ClO4)2 + 2H2O
We can see that the reaction requires two moles of perchloric acid for every one mole of barium hydroxide.
First, we can calculate the number of moles of barium hydroxide used:
moles of Ba(OH)2 = Molarity × volume in liters
moles of Ba(OH)2 = 0.02486 M × 0.01375 L
moles of Ba(OH)2 = 0.000341725
From the balanced equation, we know that two moles of perchloric acid react with one mole of barium hydroxide. Therefore, the number of moles of perchloric acid in the solution is:
moles of HClO4 = 0.000341725 mol Ba(OH)2 × (2 mol HClO4 / 1 mol Ba(OH)2)
moles of HClO4 = 0.00068345
Finally, we can calculate the molarity of the perchloric acid solution:
Molarity = moles of solute / volume of solution in liters
Molarity = 0.00068345 mol / 0.02000 L
Molarity = 0.03417 M
Therefore, the molarity of the perchloric acid solution is 0.03417 M.
Use the periodic table or graphic in lesson. Choose the correct electron configuration of carbon. 1s 22s 22p 4 1s 22s 22p 2 1s 22s 22p 1 1s 22s 12p 2
Answers
The Correct electron configuration of carbon as 1s² 2s² 2p². Option B.
To understand why this is the correct electron configuration, let's break it down step by step:
The atomic number of carbon is 6, which means it has six electrons. Electrons are distributed in energy levels or shells around the nucleus.
The first shell, known as the 1s orbital, can hold a maximum of 2 electrons. Therefore, the first part of the electron configuration is 1s², indicating that two electrons occupy the 1s orbital.
The second shell has two subshells: the 2s orbital and the 2p orbital. The 2s orbital can hold a maximum of 2 electrons, while the 2p orbital can hold a maximum of 6 electrons. In the case of carbon, after the 1s orbital, two more electrons occupy the 2s orbital. So far, we have 1s² 2s².
The remaining two electrons in carbon are placed in the 2p orbital. The 2p orbital consists of three separate p orbitals: 2px, 2py, and 2pz. Each p orbital can hold a maximum of 2 electrons. Therefore, the last part of the electron configuration for carbon is 2p², indicating that two electrons occupy the 2px and 2py orbitals. Option B is correct.
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3.20 g is the measurement of which of the following.
Answers
3.20 g is the measurement of mass.
Mass is a measure of the amount of matter in an object, and is typically expressed in grams (g), kilograms (kg) or pounds (lb). Mass is an intrinsic property of an object, meaning it is independent of its environment.
Mass is measured using a balance or scale, which compares the mass of an object to a known standard. In the case of 3.20 g, this would be the mass of an object compared to the mass of a reference object, such as a kilogram.
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what properties of a natural resource make it useful for humans as a materials or energy source?
Answers
The properties of a natural resource that make it useful for humans as a material or energy source is the ability to convert mass into energy and vice versa.
What are natural resources?The expression natural resources make reference to all types of matter and energy extracted from nature that can be used to produce goods and services.
Some examples of natural resources include for example irreversible resources such as fossil fuels (i.e., oil, or coal, gas, minerals such as metals, rocks, etc) as well as those based on the use of reversible energy such as eolic air energy, solar radiation or sunlight, soil and hydric resources or water.
Therefore, with this data, we can see that natural resources can be defined as any material and or energy obtained from nature that may be irreversible or reversibly used to produce goods and services.
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When compared to the keto form, the enol form of which of the following compounds is most stable?
1
II
III
IV
V
Which compound's? H is the least acidic?
nitroethane
propanenitrile
propanal
N,N-dimethylacetamide
acetone
Rank the compounds from strongest acids to weakest. To rank items as equivalent, overlap them.
Answers
To solve this we must be knowing each and every concept related to tautomerization. Therefore, out of keto and enol form, keto form is mot stable.
What is tautomerization?Tautomers are two structural isomers that are readily inconvertible and vary in the relative locations of their atoms while being in dynamic equilibrium. Tautomers essentially function as structural isomers.
Tautomerization is the term used to describe the tautomerization phenomena. Tautomerization includes the exchange of protons and electrons between molecules. Out of keto and enol form, keto form is mot stable.
Therefore, out of keto and enol form, keto form is mot stable.
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What is the volume of a gas 622.7 mL at 25.1 C if the temperature is increased to 60.7 C without changing the pressure, what is the new volume of the gas?
A. 697
B. 556
C. 1510
D. 9.35
Answers
Answer:
A) 697 mL
Explanation:
First convert degrees Celsius to Kelvin.
That gives;
For T1; temp 1 (273 + 25.1)
= 298.1K
T2; temp 2 (273+60.7)
=333.7K
From the formula, (V1/T1) = (V2/T2)
To find V2 = (V1/T1) × T2
= (622.7/298.1) × 333.7.
= 697.06mL
~~ 697mL
What is the molarity 10.0g of Cr(NO3)3 in 325 mL of solution
Answers
Answer:
Explanation:
molar mass Cr(NO3)3 = 238 g/mol
Convert 325 ml to liters: 325 mls x 1 L / 1000 mls = 0.325 L
Convert 10.0 g to moles: 10.0 g x 1 mol / 238 g = 0.0420 moles
Molarity = moles/liters = 0.0420 moles / 0.325 L = 0.129 M (3 sig. figs.)
This is in like an hour can someone help?!
Answers
Answer:
1.
Chemical: Aspirin
Plant: Willow tree bark
Disease: Used to reduce pain, fever, or inflammation
2.
Chemical: Digoxin
Plant: Flower, Digitalis lanata
Disease: Used to treat various heart conditions
What mass of NaCl is needed to produce a 26.4 mol/L with a 1.7 L volume?
Answers
we would need 2625.13 grams (or 2.62513 kilograms) of NaCl.
To calculate the mass of NaCl required to produce a 26.4 mol/L solution with a 1.7 L volume, we need to use the formula that relates the mass of solute, moles of solute, and molarity:Molarity (M) = moles of solute / liters of solution Rearranging this formula, we get:moles of solute = Molarity (M) x liters of solutionWe can use this formula to find the moles of NaCl needed:moles of NaCl = 26.4 mol/L x 1.7 L = 44.88 molNow, we can use the molar mass of NaCl to convert from moles to grams. The molar mass of NaCl is 58.44 g/mol:mass of NaCl = moles of NaCl x molar mass of NaClmass of NaCl = 44.88 mol x 58.44 g/mol = 2625.13 gTo produce a 26.4 mol/L solution with a 1.7 L volume.
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Penalty for an incorrect guess is equal to the credit for a correct response. In the event of a property fire in the Chemistry Teaching Labs (not involving any person or clothing), what should a lab student do to respond?
Answers
a lab student do to response should be, If doing so does not cause a delay in the evacuation, leave the room while removing your personal things. Observe the TA's and the lab staff's instructions.
Notify the emergency personnel of any other residents who require help leaving. Close the doors, leave the area, and dial 9-1-1 from a secure location. student can do the experiments they have learnt about in textbooks or from their professors in a scientific lab. They have a better understanding of an experiment's methodology and potential outcomes in this way. a location outfitted for scientific experimentation or for testing and analysis. a research centre. A location that allows for experimentation, observation, or practise in a particular field of study. The abbreviation lab comes from the mediaeval Latin word laboratorium.
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.Which statement describes the difference between incomplete dominance and codominance?
In codominance, only one allele is expressed in the offspring; In incomplete dominance, both alleles are expressed in the offspring.
In codominance, both allels are expressed in the offspring; In incomplete dominance, only one allele is expressed in the offspring.
In codominance, both alleles are expressed in the offspring; in incomplete dominance, the offspring demonstrate an intermediate form of the alleles from the parents.
In codominance, the offspring demonstrate an intermediate form of the alleles from the parents; in incomplete dominance, both alleles are expressed in the offspring.
Answers
Answer:
C Because im in 3rd grade and just did the test
Explanation:
im smart im in third grade but your doing this in college
Answer:
answer is c: In codominance, both alleles are expressed in the offspring; in incomplete dominance, the offspring demonstrate an intermediate form of the alleles from the parents.
Explanation:
PLEASE ANSWER QUICKLY!!!!
2KI (aq) + Cl₂(g) → 2KCl(aq) + 1₂(g)
What volume of 12 gas forms when
21 L Cl2 react at STP?
[?] L 12
Answers
The volume of 12 gas forms when 21 L Cl2 react at STP is 21 L.
To determine the volume of 12 gas (I assume you mean I2 gas) formed when 21 L of Cl2 reacts at STP (standard temperature and pressure), we need to use the ideal gas law equation.
The ideal gas law equation is given by:
PV = nRT
Where:
P = pressure
V = volume
n = number of moles
R = ideal gas constant
T = temperature
At STP, the pressure is 1 atm, and the temperature is 273.15 K.
From the balanced equation, we can see that the molar ratio between Cl2 and I2 is 1:1. So, if 21 L of Cl2 reacts, it will produce an equal volume of I2 gas.
Given that the volume of Cl2 is 21 L, we can assume the volume of I2 gas formed will also be 21 L.
Therefore, the volume of I2 gas formed is 21 L.
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Draw the Lewis electron dot
structure for COCI2.
What is the VSEPR shape of this
particle? PLS HELP
Answers
Answer:
Idon't know if this helps but I think it is a linear structure and if I am wrong I am so sorry
An empty balloon sits 10 meters away from a golf ball. Jamie wants to increase the
gravitational force between the two objects by filling the balloon with a substance. Which
of the following substances will most likely increase the gravitational force between the
balloon and the golf ball?
An empty balloon sits 10 meters away from a golf ball. Jamie wants to increase the
gravitational force between the two objects by filling the balloon with a substance. Which
of the following substances will most likely increase the gravitational force between the
balloon and the golf ball?
water
cotton
air
lead pieces
Answers
To increase the gravitational force between the balloon and the golf ball, It should be filled with lead pieces. Option D
What should be done?A substance's density, which measures its mass in relation to its volume, determines how much gravitational force it produces.
Lead bits are one of the suggested materials, and they are the one that would most likely boost the gravitational force. The density of lead is much higher than that of the other listed materials.
The high density of lead will result in an increase in the gravitational pull between the balloon and the golf ball if Jamie fills the balloon with lead bits.
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how much energy is required to vaporize 2 kg of copper
Answers
It would require approximately 600 kilojoules of energy to vaporize 2 kg of copper.
To calculate the energy required to vaporize a substance, we need to consider the heat of vaporization, which is the amount of energy required to convert a given amount of substance from its liquid state to its gaseous state at a constant temperature.
The heat of vaporization for copper is approximately 300 kJ/kg (kilojoules per kilogram) at its boiling point, which is around 2567 degrees Celsius (4649 degrees Fahrenheit). This means that for every kilogram of copper, 300 kJ of energy is needed to vaporize it.
Given that you have 2 kg of copper, we can calculate the total energy required as follows:
Energy = Heat of Vaporization × Mass
Energy = 300 kJ/kg × 2 kg
Energy = 600 kJ
Therefore, it would require approximately 600 kilojoules of energy to vaporize 2 kg of copper.
It's worth noting that the heat of vaporization can vary slightly depending on the purity of the copper and the specific conditions, such as temperature and pressure. The value provided here is an approximation. Additionally, it's important to handle copper and any high-temperature processes with caution, as they can pose safety hazards.
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