One pound of weight gain comes from eating 3500 calories more than what you burn. A can of soda contains 150 calories. If you drink 2 sodas every day, how many pounds will gain after a year? (Assume the soda calories are your only “extra” calories.)

To make a 3% solution of acid alcohol, you need to add 29.1 ml hydrochloric acid (HCl) to 970 ml of 95% ethanol.

To calculate how much HCl you need, you can use the formula:

Amount of HCl = Desired concentration x Volume of ethanol/100

Therefore, you will need 29.1 ml of HCl to make a 3% solution of acid alcohol:

Amount of HCl = 3 x 970/100 = 29.1 ml

You can also calculate the amount of HCl you need by using a ratio and proportion. Let x represent the amount of HCl you need.

95% ethanol : 3% acid alcohol :: 970 ml : x

By solving the proportion, you can determine that x is equal to 29.1 ml.

Thus, you will need 29.1 ml of HCl to make a 3% solution of acid alcohol when starting with 970 ml of 95% ethanol.

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Government regulatory bodies are essential in the protection of our water supply.

Protection is the act of defending oneself, one's property, or another person from physical, emotional, or financial harm. It involves shielding, guarding, and defending oneself or another person from danger or risk. It is an important concept, especially in the context of safety, security, and self-care.

These bodies are responsible for setting standards and regulations that ensure that the water that is used for drinking, cooking, and other activities is safe for human consumption. They also monitor the quality of water and investigate complaints of water contamination. By setting standards for water quality and monitoring for compliance, these organizations help to ensure that our water supply is safe and healthy. Additionally, they can take enforcement action against companies or individuals who break the regulations and pollute our water supply.

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Answer:Two atoms of the same chemical element are typically not identical. First of all, there is a range of possible states that the electrons of an atom can occupy. Two atoms of the same element can be different if their electrons are in different states.

Explanation:This is not mine write it in your own words.

Answer:

copper

Explanation:

The density of copper is 8.96 g/cm³ and the density of zinc is 7.13 g/cm³.

density= mass/volume

⇒mass = density×volume

For copper,

mass = 8.96 g/cm³ × 1 cm³

mass = 8.96 grams

For zinc,

mass = 7.13 g/cm³ × 1 cm³

mass = 7.13 grams

It is clear that, the mass of copper is more.

The Diels-Alder mechanism between a diene and a dienophile is concerted, which means that bond breaking happens simultaneously as bond forming.

The Diels-Alder reaction is a conjugate addition reaction between a diene and a dienophile. The process is regarded as a concerted reaction since it occurs in a single step with no intermediates. The cyclic reaction mechanism involves the breaking of a π bond between two double-bonded carbons (diene) and the formation of two new σ bonds between the diene and a dienophile. The diene and dienophile are drawn together by dipolar interactions when they are in close proximity. The dienophile adds to the diene with its π electron cloud when the diene's π electron cloud is most favourable for the bond formation. Since both the breaking and forming of chemical bonds occur at the same time, this is known as a concerted reaction.

Therefore, the correct answers are "concerted" and "simultaneously" respectively.

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ΔHrxn for the following reaction: 2CdS (s) + 3O₂ (g)   →   2CdO (s) + 2SO₂ (g) will be -786.6 KJ

Write the balanced chemical equation for the reaction (1)

   2H₂S (g) + O₂ (g)   →   2S (s, rhombic) + 2H₂O (g)    ΔH = -442.4 kJ

Write the balanced chemical equation for the reaction (2)

   S (s, rhombic) + O₂ (g)   →   SO₂ (g)     ΔH = -296.8 kJ

Write the balanced chemical equation for the reaction (3)

   CdO (s) + H₂S (g)   →   CdS (s) + H₂O (g)     ΔH = -124.7 kJ

To get reaction (4), multiply reaction (2) by 2

   2S (s, rhombic) + 2O₂ (g)   →   2SO₂ (g)     ΔH = -593.6 kJ

To get reaction (5), reverse reaction (3) and multiply by 2

   2CdS (s) + 2H₂O (g)   →   2CdO (s) + 2H₂S (g)     ΔH = 249.4 kJ

Finally add reaction (1), reaction (4), and reaction (5)

   2CdS (s) + 3O₂ (g)   →   2CdO (s) + 2SO₂ (g)      ΔHrxn = -786.6 kJ

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Answer:

An element which does not have two or eight electrons in its valence shell is unstable. It get stability by losing, gaining or sharing electron to complete noble gas electronic configuration. ... Elements attain stability by completing duplet or octet.

The equilibrium expression for the reaction given in the question is:

[H₂]⁴ / [CH₄][H₂O]²

Equilibrium constant, K for a given chemical reaction is written as illustrated below:

nReactant ⇌ mProduct

Equilibrium constant (K) = [Product]ᵐ / [Reactant]ⁿ

Where

Note: The above equation only applies to gaseous reactants/products and aqueous reactants/products

With the above information in mind, we shall determine the equilibrium expression for the reaction. Details below:

Equilibrium expression = [Product]ᵐ / [Reactant]ⁿ

= [H₂]⁴ / [CH₄][H₂O]²

Thus, we can conclude that the equilibrium expression is [H₂]⁴ / [CH₄][H₂O]²

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Option (D) 5.02. This means that it takes 5.02 days for the initial amount of iodine-131 to decay to half its original amount.

The half-life for a first-order radioactive decay can be calculated using the formula: t1/2 = ln(2)/k, where k is the rate constant. Substituting the given rate constant of 0.138 days^–1, we get:
t1/2 = ln(2)/0.138 ≈ 5.02 days
Therefore, the correct answer is option (d) 5.02. This means that it takes 5.02 days for the initial amount of iodine-131 to decay to half its original amount. It is important to note that radioactive decay follows first-order kinetics, which means that the rate of decay is proportional to the amount of radioactive material present. As the amount of iodine-131 decreases over time due to radioactive decay, the rate of decay also decreases, making it a continuous process until there is no more iodine-131 left.

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Answer:

Chemical change because a new substance, a gas, is produced

Explanation:

There are two types of changes that occurs in reactions viz: physical change and chemical change. Physical changes are those changes that does not alter the chemical composition of the reacting substances, hence, no new substances are formed e.g freezing, melting, change of state.

On the other hand, chemical changes affect the chemical composition of the reactants, hence, new substances characterized by increase in temperature, formation of gaseous bubbles occur.

In this case, vinegar and baking soda are mixed in a container, which resulted in the formation of bubbles and slight increase in the solution's temperature. This indicates that a CHEMICAL CHANGE occured because a new substance, a gas, is produced.

To make a 2.3 M solution of aluminum bromide in 1.50 L, you would need 202.5 grams of aluminum bromide.

Molarity (M) is defined as moles of solute per liter of solution. To calculate the grams of solute needed, we can use the formula:

grams of solute = molarity (M) × volume of solution (L) × molar mass (g/mol)

The molar mass of aluminum bromide (AlBr₃) can be calculated by adding the atomic masses of aluminum (Al) and bromine (Br):

Al: 26.98 g/mol

Br: 79.90 g/mol

AlBr₃: (26.98 g/mol) + 3 × (79.90 g/mol) = 266.78 g/mol

Now we can substitute the given values into the formula:

grams of solute = 2.3 M × 1.50 L × 266.78 g/mol = 724.605 g

Rounding to three significant figures, the answer is approximately 202.5 grams of aluminum bromide.

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Answer:

1.476 mol molecules

Explanation:

Water molecules have a stronger attraction than helium due to the presence of dipole-dipole interactions resulting from the polarity of the water molecule.

Water molecules have a stronger attraction than helium due to the difference in their intermolecular forces. Intermolecular forces are the attractive forces that exist between molecules and play a crucial role in determining the physical properties of substances.

Water molecules have a polar nature, meaning they have a partial positive charge on the hydrogen atoms and a partial negative charge on the oxygen atom.

This polarity arises from the unequal sharing of electrons in the O-H bonds due to oxygen's higher electronegativity compared to hydrogen. The presence of polar bonds within the water molecule gives rise to a dipole-dipole interaction.

In contrast, helium is a noble gas and exists as individual atoms. Helium atoms are electrically neutral and do not possess a permanent dipole moment.

As a result, helium exhibits weak intermolecular forces known as London dispersion forces or Van der Waals forces. These forces arise due to temporary fluctuations in electron distribution, causing temporary dipoles that induce dipoles in neighboring atoms or molecules.

The dipole-dipole interaction in water is stronger than the London dispersion forces in helium. This is because dipole-dipole forces are more significant when there are permanent dipoles in the molecules.

The stronger attraction between water molecules leads to higher boiling and melting points compared to helium.

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Answer:

i think its either A or D so if one of them doesn't work maybe try the other if you can. i hope that helps

Explanation:

In a neutralization reaction an acid reacts with a base to produce a neutral solution. Hence, the option C is correct.

In a neutralization reaction, an acid and a base react with each other to form a salt and water. The hydrogen ions (H⁺) from the acid combine with the hydroxide ions (OH⁻) from the base to form water (H₂O). The remaining ions combine to form a salt.

The general chemical equation for a neutralization reaction is:

Acid + Base → Salt + Water

For example, in the neutralization of hydrochloric acid (HCl) with sodium hydroxide (NaOH), the reaction can be represented as:

HCl + NaOH → NaCl + H₂O

Here, hydrogen ions (H⁺) from HCl combine with hydroxide ions (OH⁻) from NaOH to form water (H₂O), and the remaining sodium ion (Na⁺) and chloride ion (Cl⁻) combine to form sodium chloride (NaCl), which is the salt.

The net effect of the neutralization reaction is to produce a solution that is neither acidic nor basic but neutral. The pH of the resulting solution will be close to 7, depending on the strength of the acid and base used in the reaction.

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Answer:

im solving now

Explanation:

The correct answer is c. Iron. Red water problems are primarily caused by the presence of iron in the water, which can cause discoloration and an unpleasant taste and odor.

Iron Red water problems are primarily due to the presence of iron in the water. When iron is oxidized, it forms insoluble reddish-brown particles that can cause staining and other issues. Hardness refers to the concentration of dissolved minerals like calcium and magnesium in water, while turbidity refers to the cloudiness or haziness of water caused by suspended particles. Hydrogen sulfide is a gas that can cause a rotten egg odor in water.

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Answer:

B) Amount of matter within an object

C) amount of matter within a given volume

Explanation:

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Explanation:

K2SO3

hope it helps!

.....

Answer:

Catalase

Explanation:

These reactive oxygen specie or free radicals that cause damage or injury to cells also lead to oxidative stress if unchecked by antioxidants. As suggested in the question, there are several enzymes that act as antioxidants in mitigating the effects of these reactive oxygen specie or free radicals. These enzymes include catalase, superoxide dismutase and glutathiones (such as glutathione s-transferase).

The enzyme that however prevents the accumulation of hydrogen peroxide (H₂O₂) in the peroxisome is catalase. Catalase is an enzyme that is present in the peroxisome; it (catalase) detoxifies/acts on H₂O₂, converting it (H₂O₂) into water and oxygen.

From the given reactions, another quantity that is equal to ΔH degree reaction is 1. enthalpy of combustion, 2. 4x bond energy of carbon-hydrogen bond, 3. enthalpy of formation and 4. -4x bond energy of CH bond.

Hence, the correct option is A.

Enthalpy of a reaction is defined as the total sum of the heat of the system in the reaction and the product of the pressure and volume of the system. In the first reaction, the enthalpy of combustion of methane in the presence of oxygen is calculated, which gives the change in heat during burning.

In the second reaction, bond breaking will give the heat change as 4x bond energy of the carbon and hydrogen bond is endothermic.

In the third reaction, the enthalpy of formation of methane will give the change in the enthalpy.

In the fourth reaction, the difference between the bond energies of the reactants and the products that are -4x bond energy of carbon and hydrogen will result in enthalpy change.

Hence, the bond of combustion and formation can be a component along with enthalpy.

Hence, the correct option is A.

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Answer:

Explanation:

The half-life of a radioactive material is the time it takes for half of the material to decay. We can use this fact to determine how many half-lives old the rock is.

First, we need to find out how much of the radioactive material is left in the rock. We know that the rock has a mass of 40 grams, and 10 grams of that mass is the radioactive material. If we assume that all of the decay products (the stable product) are still in the rock, then the remaining mass of the radioactive material is:

10 grams * (1/2)^(number of half-lives)

where the factor (1/2) represents the fraction of the radioactive material that decays in each half-life.

We can rewrite this equation as:

(10 grams)/(40 grams) = (1/2)^(number of half-lives)

Solving for the number of half-lives, we get:

number of half-lives = log2(10/40) = log2(0.25) ≈ -2

This means that the rock is about 2 half-lives old. Since we can't have a negative number of half-lives, we can say that the rock is about 2 half-lives old or approximately 2 times the half-life of the radioactive material.

Answer:

The radioactive material in the rock undergoes radioactive decay, meaning that it spontaneously decays over time, transforming into another element and releasing radiation. The rate of decay is measured by the half-life, which is the amount of time it takes for half of the radioactive material to decay.

Since the rock contains 10 grams of radioactive material and 30 grams of stable product, we know that it originally contained a total of 40 grams of material. This means that half of the original material has decayed, since 20 grams of radioactive material would have decayed into 10 grams of stable product.

Since we know that one half-life has passed, we can use the formula N = N0(1/2)^(t/t1/2) to solve for t, the time that has passed in terms of the half-life. Here, N is the current amount of radioactive material, N0 is the original amount, t is the time that has passed, and t1/2 is the half-life.

Plugging in the values we know, we get:

10 = 40(1/2)^(t/t1/2)

Simplifying, we get:

1/4 = (1/2)^(t/t1/2)

Taking the logarithm of both sides, we get:

log(1/4) = (t/t1/2)log(1/2)

Solving for t/t1/2, we get:

t/t1/2 = log(1/4)/log(1/2) = 2

So, the rock is two half-lives old.

Answer:

Explanation:

Through respiration, carbon dioxide (CO2) is exhaled for the exchange of oxygen (O2) from the air. At the cellular level, O2 is used to convert biochemical energy from nutrients into adenosine triphosphate (ATP) with the production of CO2.

Answer:

I believe it's radiation, but please correct me if I'm wrong.

Explanation: Have a good day !

Answer:

0.0566 moles/liter

Explanation:

molarity= moles/liter of solution

molarity=8.1mole/143 liter = 0.0566

This equation shows the reaction of cis-2,3-diethyloxirane with hydrogen chloride to form 4-chloro-3-hexanol. There are in total of 2 stereoisomers are possible for 4-chloro-3-hexanol.

The equation you provided shows the reaction of cis-2,3-diethyloxirane with hydrogen chloride to form 4-chloro-3-hexanol. In this reaction, the cis-2,3-diethyloxirane molecule is a chiral molecule, which means that it has two non-superimposable mirror images, or stereoisomers. The hydrogen chloride molecule is achiral, meaning it does not have stereoisomers. When a chiral molecule reacts with an achiral molecule, the resulting product will generally be achiral. However, in some cases, the reaction can produce a chiral product if the reacting chiral molecule is present in both of its stereoisomers. In this case, it is possible that the cis-2,3-diethyloxirane molecule could react with hydrogen chloride in both of its stereoisomers, resulting in two different stereoisomers of 4-chloro-3-hexanol.

Therefore, the total number of stereoisomers possible for 4-chloro-3-hexanol is 2.

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Answer:

b. Malic Acid

Explanation:

Malic (organic) Acid is found in apple.

GL

Answer: Warm ocean air then rises into the storm, then forming an area of low pressure underneath. :)

Explanation:

Answer:

Increase

Explanation:

The theoretical yield of CaS that could be prepared from 7.77 g of Ca(s) and 2.36 g of sulfur(s) is 0.166 g.

The chemical reaction of Calcium reacts with sulfur forming calcium sulfide (CaS(s)) can be given as;

Ca(s) + S(s) → CaS(s)

This reaction states that one mole of Ca reacts with one mole of S to produce one mole of CaS.

Now, we can calculate the mole of Ca and S using the given masses as;

Molar mass of Ca = 40.08 g/mol

Molar mass of S = 32.06 g/mol

Moles of Ca = mass / molar mass= 7.77 g / 40.08 g/mol = 0.194 mol

Moles of S = mass / molar mass= 2.36 g / 32.06 g/mol = 0.0735 mol

From the balanced chemical equation, we can see that the ratio of Ca to CaS is 1:1, which means that the number of moles of CaS produced will be equal to the moles of Ca reacted. In this case, the moles of CaS produced will be equal to 0.194 mol.

To calculate the theoretical yield (in grams) of CaS that could be prepared from the given masses, we can use the following formula:

Theoretical yield = (mass of limiting reagent / molar mass of limiting reagent) x (molar mass of product / coefficient of product)

In this reaction, the limiting reagent is S, as the amount of Ca is in excess.

So, we will use the moles of S to calculate the theoretical yield.

The molar mass of CaS is 72.14 g/mol, and the coefficient of CaS in the balanced chemical equation is 1.

So, putting the values in the formula;

Theoretical yield = (0.0735 mol / 32.06 g/mol) x (72.14 g/mol / 1)= 0.166 g (rounded off to three significant figures)

Therefore, the theoretical yield of CaS that could be prepared from 7.77 g of Ca(s) and 2.36 g of sulfur(s) is 0.166 g.

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