What is an example of a polyatomic ion
Answer: The hydroxide cation (OH -) and the phosphate cation (PO 4 3-) are both polyatomic ions.
Explanation:
Answer:
OH - and PO 4 3- are both polyatomic ions
in the molecule below, how many atoms could make hydrogen bonds with water?
The molecule you have provided is not included in your question, so I cannot provide a direct answer.
However, in general, for a molecule to form hydrogen bonds with water, it must have hydrogen atoms that are covalently bonded to highly electronegative atoms such as oxygen, nitrogen, or fluorine. These hydrogen atoms then form hydrogen bonds with the lone pairs of electrons on the water molecules.
Therefore, the number of atoms in a molecule that can form hydrogen bonds with water depends on the presence of such covalently bonded hydrogen atoms and their accessibility to water molecules.
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Uranium-235 undergoes the following fission process after absorbing a neut
235/92U + 1/0n → 93/36Kr + 140/56Ba + 1/0xon
X=
Answer:
yes correct
Explanation:
Answer: x = 2
Explanation:
Energy in vs Energy out = Energy balance. Explain this concept, give examples and provide support for your explanation.
The concept of energy balance refers to the equilibrium between the energy input into a system and the energy output from that system. It is based on the principle of conservation of energy, which states that energy cannot be created or destroyed but can only be transferred or transformed from one form to another.
In terms of human energy balance, it involves the energy intake from food and beverages (energy in) and the energy expenditure through basal metabolic rate, physical activity, and other bodily processes (energy out). When the energy intake matches the energy expenditure, there is an energy balance. However, when there is an imbalance, either an excess or deficit of energy, it can lead to weight gain or weight loss, respectively.
For example, if a person consumes 2000 calories (energy in) through their diet and expends 2000 calories (energy out) through their daily activities and bodily functions, they maintain an energy balance. This means that the energy intake is equal to the energy expenditure, and their weight remains stable.
On the other hand, if a person consumes 2500 calories (energy in) but only expends 2000 calories (energy out), there is a positive energy balance. The excess energy is stored in the body as fat, leading to weight gain over time.
Conversely, if a person consumes 1500 calories (energy in) but expends 2000 calories (energy out), there is a negative energy balance. The body needs to compensate for the energy deficit by utilizing stored energy reserves, such as fat, resulting in weight loss.
Support for the concept of energy balance comes from scientific studies on weight management and obesity. It has been shown that maintaining an energy balance is crucial for weight maintenance, while sustained positive or negative energy balances can lead to weight changes. Additionally, energy balance plays a role in various physiological processes, including metabolism, hormone regulation, and overall health.
By understanding and managing energy balance, individuals can make informed decisions regarding their diet, physical activity, and lifestyle to achieve and maintain a healthy weight and overall well-being.
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At the atomic, are synthetic medicines different from the natural medicines?
Synthetic and natural medications are not fundamentally dissimilar at the atomic level. Chemical compounds made up of atoms and molecules make up both sorts of pharmaceuticals.
Are there atomic differences between manufactured and natural medicines?At the atomic level, natural medicines found in the rain forest and synthetic medications are identical. After all, whether they are created in a lab or the natural world, they are still just molecules.
What distinguishes synthetic medications from natural ones?Designer drugs, club drugs, and other names for synthetic pharmaceuticals replicate or enhance the effects of natural narcotics. Contrary to those natural drugs, however, synthetic narcotics such as K2, MDMA, or bath salts are all generated from man-made chemicals and are typically produced in a laboratory environment.
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How many grams of carbon would be present in carbon monoxide that contains 2.6 grams of oxygen?
Answer:
1.95g
Explanation:
Find mass in CO
Find C mass
Is it possible to make an aqueous solution with strontium hydroxide, Sr(OH)2 (aq), that gives a pOH of 10.54? If so calculate it. If not, explain why not.
Yes, it is possible to make an aqueous solution of strontium hydroxide that gives a pOH of 10.54 because of thr Sr ions in the solution.
First, we can use the relationship between pH and pOH,
pH + pOH = 14
Since we want a pOH of 10.54, we can solve for the pH,
pH = 14 - pOH
pH = 14 - 10.54
pH = 3.46
Next, we can use the ionization constant expression for strontium hydroxide,
Sr(OH)₂(s) → Sr²⁺(aq) + 2OH⁻(aq)
Kw = [H⁺][OH⁻] = 1.0 x 10⁻¹⁴
Hence, the concentration will be given as,
[OH⁻] = 2[Sr²⁺]
Substituting this expression into the Kw expression, we get,
Kw = [H⁺][OH⁻] = [H⁺] (2[Sr²⁺])
1.0 x 10⁻¹⁴ = [H⁺] (2x)
where x is the molar concentration of strontium ions.
Solving for x, we get,
x = 1.0 x 10⁻¹⁴ / 2
x = 5.0 x 10⁻¹⁵
Therefore, the molar concentration of strontium ions in solution is 5.0 x 10⁻¹⁵ M.
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When a compound is described as a strong acid it means that:
a. the acid solution is dilute
b. the acid solution is concentrated
c. the acid mostly dissociates when dissolves in water
d. the acid mostly solvates when it dissolves in water
The acid mostly dissociates when dissolves in water.
option C.
What is a strong acid?A strong acid is an acid that is completely dissociated in an aqueous solution such as water when it is dissolved in it. Strong acid is a chemical species with a high capacity to lose a proton, H+.
In other words, a strong acid is one which is virtually 100% ionized in solution.
Thus, when a compound is described as a strong acid it means that: the acid mostly dissociates when dissolves in water.
So option C is the correct answer as it explains the meaning of a strong acid.
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How many grams are 3.01 x 10^23 molecules of methane (molar
mass = 16.04 g/mol)?
Answer:
8.02
Explanation:
You are making sweet tea. You add 56g of sugar into 78g if tea. What is the mass percent of sugar ?
Answer:
Approximately 72%
Explanation:
\(Sugar = 56g\\Tea's \:mass = 78g\\\\Sugar\:mass\:percentage = \\\frac{56}{78} \times 100\\\\\frac{5600}{78} \\\\=71.79\\Approximately \:72\%\)
equal masses of helium and neon are placed in separate containers of equal vat the same t. compare the number of atoms in each container. select an answer and submit. for keyboard navigation, use the up/down arrow keys to select an answer. a there are more atoms of helium than of neon. b there are more atoms of neon than of helium. c there are as many atoms of helium as there are of neon.
Using the molar masses of helium and neon, as well as Avogadro's number, we can see that there are more helium atoms than there are neon atoms.
Let us assume we have 100 g of helium and 100 g of neon. In order to calculate the number of atoms, we need to first calculate the number of moles of each gas. We can do this by using their respective molar masses (4 g/mol for He, and 20 for Ne):
n(He) = m(He) / M(He) = 100 g / 4 g/mol = 25 mol of He
n(Ne) = m(Ne) / M(Ne) = 100 g / 20 g/mol = 5 mol of Ne
Now we can use Avogadro's number (6.022e23/mol) to calculate the number of atoms present in both gas samples:
N(He atoms) = 25 mol * 6.022e23/mol = 150.55e23 He atoms
N(Ne atoms) = 5 mol * 6.022e23/mol = 30.11e23 Ne atoms
Obviously, we have 5 times more He atoms than Ne atoms.
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What volume of ammonia would be produced by this reaction if 6. 4 cm3 of nitrogen were consumed
Therefore, 12.8 cm3 of ammonia would be produced by the reaction when 6.4 cm3 of nitrogen is consumed.
To determine the volume of ammonia produced, we need to consider the balanced chemical equation and the stoichiometry of the reaction. Since the chemical equation is not provided, I'll assume a balanced equation for the reaction of nitrogen (N2) with hydrogen (H2) to form ammonia (NH3):
N2(g) + 3H2(g) → 2NH3(g)
According to the balanced equation, 1 mole of nitrogen reacts with 3 moles of hydrogen to produce 2 moles of ammonia. From the given information, we know that 6.4 cm3 of nitrogen (N2) is consumed.
To calculate the volume of ammonia produced, we need to use the stoichiometric ratio between nitrogen and ammonia. From the balanced equation, we can see that the ratio is 1:2. Therefore, for every 1 cm3 of nitrogen consumed, 2 cm3 of ammonia will be produced.
Using this ratio, we can calculate the volume of ammonia produced as follows:
Volume of ammonia = (Volume of nitrogen consumed) × (2 cm3 of ammonia / 1 cm3 of nitrogen)
Volume of ammonia = 6.4 cm3 × 2 cm3/cm3
Volume of ammonia = 12.8 cm3
Therefore, 12.8 cm3 of ammonia would be produced by the reaction when 6.4 cm3 of nitrogen is consumed.
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List at least 3 difference between how you measure a liquid sample from a buret versus a graduated cylinder.
Difference between how to measure a liquid sample from a buret verus a graduated cylinder is- A burette is a scaled cylindrical tube attached to a turning plug or stopcock or a valve whereas a graduated cylinder is a cylinder used to measure bulk volumes.
A burette is a laboratory apparatus used in chemical analysis to measure a liquid sample, having a graduated glass tube with a turning plug at one end and the graduated cylinder is a also a laboratory apparatus used to measure liquid sample.
To measure the liquid sample, you pour the liquid into measuring cylinder. The cylinder has volume graduation marks on the side of the cylinder which indicates the volume. Volume can be read directly from the bottom of the liquid meniscus. A burette is preferred to be used in titration because it can be used to dispense accurate volumes of liquid and it can contain enough amount of reagents for titration. It has graduation marks used to read the volume delivered and it reads from top to bottom starting zero.
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Match the following items. 1. way light reflects from a mineral streak 2. way a mineral breaks under stress luster 3. reveals true, natural color of a mineral cleavage 4. least reliable property for identification color 5. measured using the Mohs scale hardness
Answer:
The following is the correct match:
1. Luster refers to how the reflection of the light takes place from a mineral.
2. Cleavage signifies a manner in which the dissociation of a mineral occurs at the time of stress.
3. Streak helps in the identification of a true and natural color of a mineral.
4. Color is the least reliable characteristic of determination.
5. Hardness is determined with the application of the Mohs scale.
While it's not possible in every situation, what is the safest solution to protect yourself from chemical hazards in the work environment?.
The safest solution to protect yourself from chemical hazards in the work environment is to wear PPE kit.
What function does PPE serve?
PPE, or personal protective equipment, is clothing and gear used to reduce exposure to dangers that might result in life-threatening diseases and injuries at work. These diseases and injuries might be brought on by exposure to workplace risks such as chemical, radioactive, physical, electrical, or mechanical ones.
According to the given question:
Personal protective equipment, or "PPE," is clothing worn to reduce exposure to a range of risks. PPE examples include gloves, eye and foot protection, hard helmets, respirators, complete body suits, and protected hearing gear (earplugs, muffs).
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What is the difference between accounting clerk and bookkeeper.
Answer:
The difference is typically their level within the organisation, with bookkeeper being the higher of the two.
Also, this question isn't related to Chemistry!
Answer:
An accounting clerk takes care of common office tasks that include reporting, bookkeeping, research, and some more things. Bookkeepers are responsible for giving accurate, up-to-date financial information about a business.
Gallium is a metallic element in Group III. It has similar properties to aluminium.
(a) (i) Describe the structure and bonding in a metallic element.
Metallic elements exist in a solid-state and they are opaque, have a shiny surface, good conductors of electricity and heat, malleable and ductile, and are dense. The structure of metals is formed by atoms that are held together by metallic bonds. These atoms have loosely bound valence electrons that can be shared between the neighboring atoms.
Therefore, the outermost shells of these atoms are incomplete due to the sharing of valence electrons, forming a lattice structure known as a metallic bond.Metallic elements have a unique crystal structure that occurs in two forms. The most common type of metal crystal structure is the body-centered cubic structure where the atoms are arranged in a cube with one atom located at the center of the cube. The other type of metal crystal structure is the face-centered cubic structure, where each corner of the cube is an atom and there is an additional atom at the center of each face of the cube .Metallic bonding occurs due to the delocalized electrons that exist in the metal structure. The valence electrons from each atom are free to move throughout the entire metal lattice. Therefore, these electrons form a "sea of electrons" that is shared by all the atoms in the lattice. This results in the metal structure having high thermal and electrical conductivity.Metals are known for their ductility and malleability properties. These properties are due to the metallic bonding that exists in the metal structure. Since the valence electrons are shared, they can easily move past one another, allowing the metal to be hammered into different shapes without breaking.The properties of metals vary depending on their structure and bonding. Gallium, being a metallic element in Group III, has similar properties to aluminum. Therefore, it has a similar metallic bond structure with delocalized electrons that provide the metal with its unique properties.For such more question on valence electrons
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what is the difference between a colloid and a solution
The main difference between a colloid and solution lies in the size of the particles dispersed in the medium.
1. Colloid: A colloid is a mixture in which tiny particles (between 1 nanometer and 1 micrometer in size) are dispersed evenly throughout a continuous medium. The dispersed particles do not settle and remain suspended due to their relatively larger size. Examples of colloids include milk, fog, and gelatin.
2. Solution: A solution is a homogeneous mixture in which the particles are molecular or ionic in size (less than 1 nanometer) and are uniformly distributed throughout a solvent. The particles in a solution are so small that they do not scatter light, and the mixture appears transparent. Common examples of solutions include saltwater, sugar dissolved in water, and air.
In summary, the key distinction between a colloid and a solution lies in the size of the dispersed particles. Colloids have larger particles that remain suspended, resulting in a cloudy or opaque appearance, whereas solutions have much smaller particles that are molecular or ionic in size and result in a clear and transparent mixture. Understanding this difference helps to differentiate between these two types of mixtures in various scientific and everyday contexts.
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The National Institute of Science and Technology (NIST) kinetics database lists the rate constant, , of a particular gaseous reaction as 3.93×10−10 cm3⋅molecule−1⋅s−1 at 298 K.
A) Convert the rate constant to units of M−1⋅s−1 .
B) Convert the rate constant to units of Torr−1⋅s−1 .
Answer:B
Explanation:
.
From the tabulated data presented here (excerpted from Appendix C), calculate A Gº for the following reaction: 4 NO(g) + 2 N20(g) + O2(g). O-139.7 kJ O +554.0 kJ O More information is needed O-198.3 kJ O +16.9 kJ
To calculate the standard Gibbs free energy change (ΔGº) for the given reaction, we need the standard Gibbs free energy of formation (ΔGfº) for each species involved.
Step 1: Write down the given reaction:
4 NO(g) + 2 N2O(g) + O2(g) → products
Step 2: Look up the standard Gibbs free energy of formation (ΔGfº) for each species in the reaction from the tabulated data.
Step 3: Calculate ΔGº for the reaction using the formula:
ΔGº = Σ(ΔGfº of products) - Σ(ΔGfº of reactants)
In this formula, you will multiply the ΔGfº of each species by its respective stoichiometric coefficient (the numbers in front of each species in the reaction equation), sum them up, and then subtract the sum of the reactants from the sum of the products.
Once you have the tabulated data containing the ΔGfº values, follow these steps, and you will be able to calculate the standard Gibbs free energy change for the given reaction.
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describe the difference between corrosion and rust
The main difference between corrosion and rust is that corrosion occurs as a result of the chemical influence and it affects a lot of materials whereas rusting is only accelerated by certain chemicals and usually affects iron substances
Hopes this helps :)
if an unknown sample solution is prepared by diluting 10.00 ml of the original solution to a total volume of 100.0 ml with deionized water, what is the dilution factor?
The dilution factor of the unknown sample is 10. The dilution factor of a solution refers to the ratio of the final volume of the now diluted solution to the initial volume of the of the initial concentrated solution.
Mathematically;
The dilution factor is given by the formula;
Dilution factor = Final volume of the now diluted solution/ Initial volume of more concentrated solution
Final volume of the now diluted solution = 100.0 ml
Initial volume of more concentrated solution = 10.00 ml
Dilution factor = 100.0 ml/10.00 ml
Dilution factor = 10
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Which four of the following are advantages of die casting over sand casting: (a) better surface finish, (b) closer tolerances, (c) higher melting-temperature metals can be cast, (d) higher production rates, (e) larger parts can be cast, (f) mold can be reused, and (g) no flash is formed between the die halves
The four advantages of die casting over sand casting are: (a) better surface finish, (b) closer tolerances, (d) higher production rates, and (f) mold can be reused.
Die casting provides a better surface finish because the process involves injecting molten metal into a reusable metal mold, which results in a smoother and more uniform surface. In contrast, sand casting uses sand molds, which can create a rougher surface texture. Closer tolerances are achieved in die casting due to the precision of the metal molds, allowing for more accurate and consistent dimensions in the final product. Sand casting, however, is limited by the less precise nature of the sand molds.
Higher production rates are possible with die casting since the metal molds can be reused multiple times, speeding up the manufacturing process. Sand casting requires the creation of a new sand mold for each casting, which can slow down production. Finally, the reusability of the metal molds in die casting also provides an advantage, as it reduces material waste and lowers overall production costs. Sand casting, on the other hand, requires new molds for each casting, leading to higher material consumption and costs. So therefore (a) better surface finish, (b) closer tolerances, (d) higher production rates, and (f) mold can be reused are Tthe four advantages of die casting over sand casting..
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You were asked to notice that the rim of the porcelain evaporating dish is unglazed, and observe what water will do to the unglazed side of the piece of terra cotta plant pot on your tray. This is why we preheated the evaporating dish prior to measuring the evaporating dishes initial mass. Brian suggests to Matt that if the evaporating dish was not preheated, the mass of the anhydrate will be heavier resulting in a greater value for the anhydrate, and a smaller value for "z" in this formula, CuxCly • zH2O. Do you agree or disagree? Justify your answer
Yes, I am agree with the evaporating dish is not preheated, then the mass of the anhydrate will be heavier, resulting in a greater value for the anhydrate and a smaller value for "z" in this formula:
CuxCly • zH2O
An anhydrate is a chemical compound that does not contain any water molecules. An anhydrate is formed when the water molecules present in a hydrate are removed through heating or another process. When we heat a hydrated compound, it results in the loss of water molecules from the compound, leading to the formation of an anhydrate.The anhydrate's mass is measured by calculating the difference in weight of the evaporating dish containing the hydrated sample and the weight of the empty evaporating dish. When we use an unpreheated evaporating dish, it results in the loss of weight as the water molecules are released from the hydrated compound. The water molecules released from the sample will condense on the cooler surface of the evaporating dish, which will lead to a higher weight than the actual weight of the anhydrate. Therefore, if the evaporating dish is not preheated, then the mass of the anhydrate will be heavier, resulting in a greater value for the anhydrate and a smaller value for "z" in this formula, CuxCly • zH2O.For such more questions on anhydrate
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What is a strong base
There are two common isotopes of Hydrogen - 1H, and 2H. How many possible combinations of these isotopes can be found in a Hydrogen molecule (H2)?
An H2 molecule only has three unique isotope combinations.
What are the hydrogen isotopes 2H and 3H?The 3H (or hydrogen-3) isotope is more commonly referred to as tritium than the 2H (or hydrogen-2) isotope. Sometimes, deuterium and tritium are represented by the letters D and T rather than 2H and 3H. Although though this application is widespread, according to the IUPAC, it is not preferred.
Each hydrogen atom in a hydrogen molecule (H2) can either be the 1H isotope (also known as protium) or the 2H isotope (also called deuterium). As a result, each hydrogen atom has two potential isotopes, for a total of 2 2 = 4 possible isotope combinations in an H2 molecule. These four potential pairings are as follows:
Both hydrogen atoms are 1H (H-H)
Both hydrogen atoms are 2H (D-D)
The first hydrogen atom is 1H and the second hydrogen atom is 2H (H-D)
The first hydrogen atom is 2H and the second hydrogen atom is 1H (D-H)
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A small can rolled 2 meters in 2 hours.
Calculate the mass percentage composition of nitrogen in acetaminophen, C8H9NO2
The mass percent composition of nitrogen in acetaminophen is 9.26 %.
The mass percent composition of an element is the percentage of the ratio of the molar mass of that element to the molar mass of the entire compound. Acetaminophen represented as C8H9NO2 is a drug that is used as a pain reliever.
First, we will calculate the molar mass of this compound. For this, we should know the mass of each element present in the compound.
mass of C = 12, mass of H = 1, mas of N = 14, mass of O = 16.
Now, we will calculate the molar mass of acetaminophen
= 12*8+ 1*9+14*1+16*2
= 151 g
Now, we have to calculate the mass percent composition of Nitrogen.
The molar mass of nitrogen = 14g
The molar mass of the entire compound = 151 grams.
Mass percent composition of N = (mm of N ÷ mm of C8H9NO2) ×100
= (14/151) × 100 = 0.0926 × 100
= 9.26 %
Therefore, the mass percent composition of nitrogen in acetaminophen (C8H9N02) is 9.26%.
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in 1-2 sentences explain how the shorelines can affect weather.
Answer: Global warming causes sea-level rise as oceans expand, and makes storm patterns more energetic. Consequently it will affect most of the world's coastlines through inundation and increased erosion.
Explanation:
How many kilograms are there in 81. 2 Mg? Express your answer in scientific notation
As there are 1,000,000 kg in 1 Mg, we must multiply by 1,000,000 to convert from Mg (megagrams) to kilogrammes. Therefore:
8.12 × 107 kg or 81.2 Mg is equal to 81.2 x 1,000,000 kg.
8.12 x 107 kilos, or in scientific notation, are contained in 81.2 Mg.
, I apologize for my mistake in the previous response. The conversion from Mg to kg is indeed done by multiplying by 1,000,000. Thank you for providing the correct calculation and explanation. The answer is:
81.2 Mg = 81.2 x 1,000,000 kg = 8.12 x 10^7 kg
Expressed in scientific notation, there are 8.12 x 10^7 kilograms in 81.2 Mg.
8.12 x 107 kilos, or in scientific notation, are contained in 81.2 Mg.
8.12 x 107 kilos, or in scientific notation, are contained in 81.2 Mg.
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