YOU WILL GET 35 POINTS: How many moles of HCl are needed to produce two moles of hydrogen gas (H2)?????

Answer:

Cations have a smaller ionic radius than the neutral atom from which they were formed because its nucleus becomes more positively charged when an atom loses electrons. Thus it attracts any remaining electrons more strongly, resulting in a smaller size.

Explanation:

Answer:

4.42 x 10^22 molecules

Explanation:

1 mole of CO2 has 6.022 x 10^23 molecules

=> 0.0734 x 6.022 x 10^23 = 4.420148 x 10^22 or 4.42 x 10^22

Answer:

I apologize that I'm late and all But your answer is B. Energy Transfer.

Explanation:

The waves transfer energy to the sand for example.

Explanation:

It is the emission of electron from a metal under the effect of light is known as photo electric effect

I hope this imformation help full for you

Based on atomic properties and structure:

Isotopes are atoms of an element having the same atomic number but different mass numbers.

The difference in mass number is dues to different neutron numbers.

However, because they have the same proton number, they are atoms of the same element.

Neutral atoms contains equal number of protons and electrons.

An atom of barium has 56 protons and 56 neutrons in order to maintain electrical neutrality.

The mass number of an atom is determined by the sum of protons and neutrons.

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Only reactions B and C would be spontaneous at 298 K.

Spontaneous reactions are reactions that occur naturally and do not require external energy input to proceed. This can be determined by calculating the Gibbs free energy of the reaction at a given temperature and pressure. Gibbs free energy can be calculated using the equation ΔG = ΔH - TΔS, where ΔH is the enthalpy change of the reaction, ΔS is the entropy change of the reaction, T is the temperature in Kelvin, and ΔG is the change in free energy of the reaction.
A spontaneous reaction will have a negative ΔG, meaning that the reaction is exergonic and releases energy. Therefore, the products of the reaction are more stable than the reactants. If ΔG is positive, the reaction is endergonic and requires energy input to proceed.
In order to determine which of the following reactions would be spontaneous at 298 K, we must calculate the ΔG of each reaction and determine if it is positive or negative. The reactions are:
A. 2H2O(l) → 2H2(g) + O2(g) ΔH = 484 kJ/mol, ΔS = 69.9 J/K mol
B. CO2(g) + H2(g) → CO(g) + H2O(g) ΔH = 41 kJ/mol, ΔS = -102.6 J/K mol
C. Fe2O3(s) + 2Al(s) → Al2O3(s) + 2Fe(l) ΔH = -850 kJ/mol, ΔS = -243 J/K mol
To calculate ΔG at 298 K, we will use the equation ΔG = ΔH - TΔS. The temperature in Kelvin is 298 K, or 25°C.
A. ΔG = (484,000 J/mol) - (298 K) x (69.9 J/K mol) = +4165 J/mol (positive, non-spontaneous)
B. ΔG = (41,000 J/mol) - (298 K) x (-102.6 J/K mol) = -2874 J/mol (negative, spontaneous)
C. ΔG = (-850,000 J/mol) - (298 K) x (-243 J/K mol) = -42600 J/mol (negative, spontaneous)

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The rate constant of the second-order reaction is 0.111 M^-1 min^-1.

The given data represents a second-order reaction where the rate of the reaction is proportional to the square of the concentration of A.

The integrated form of the second-order reaction is:

1/[A]t = kt + 1/[A]0

where [A]t and [A]0 are the concentrations of reactant A at time t and time zero, respectively, k is the rate constant.

We can use the given information to calculate the rate constant (k) of the reaction for the given half-life (t1/2) of 3.15 minutes:

t1/2 = (1 / k[A]0)

Using the percentage decrease in concentration and the given initial concentration, we can calculate the concentration of A at time t:

[A]t = [A]0 - 0.30[A]0 = 0.57126 M

Substituting the given values, we get:

3.15 min = (1 / k)(0.0818 M) / (0.0818 M - 0.57126 M)

Simplifying the equation above, we can solve for k:

k = 0.111 M^-1 min^-1

Therefore, the rate constant of the second-order reaction is 0.111 M^-1 min^-1.

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Answer:primary consumer

Explanation:

i got it right

The percentage left is 57%.

We know that a fraction is a part of a whole. Let us in this case take the whole as one and then the fraction that we remove out of it is 3/7. We now have to find the percentage that remains.

Thus'

Fraction that remains = 1 - 3/7 = 4/7

Hence;

Percentage that is left = 4/7 * 100

= 57%

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At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

1: Write the balanced chemical equation:

\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)

2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.

Initial:

\(C_O\)(g) = 0.3500 mol

\(Cl_2\)(g) = 0.05500 mol

\(C_OCl_2\)(g) = 0 mol

Change:

\(C_O\)(g) = -x

\(Cl_2\)(g) = -x

\(C_OCl_2\)(g) = +x

Equilibrium:

\(C_O\)(g) = 0.3500 - x mol

\(Cl_2\)(g) = 0.05500 - x mol

\(C_OCl_2\)(g) = x mol

3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:

Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]

4: Substitute the given equilibrium constant (Kc) value into the expression:

1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)

5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:

1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x

6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.

7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.

8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):

\(Cl_2\)(g) = 0.05500 - x

9: Calculate the value of \(Cl_2\)(g) at equilibrium:

\(Cl_2\)(g) = 0.05500 - x

\(Cl_2\)(g) = 0.05500 - (positive value of x)

10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.

Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

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Answer:

Hope this isnt dumb!

Explanation:

Earth rotates on a axle this causes us to experience a day and night moment but however Earth's axis is tilted 23.5 degrees the and angled to measure between Earth's equatorial plane in the plane in which orbits are sun.

Answer:

The Earth rotates on it's axis, and it takes 24 hours for the Earth to go all the way around. When the part of the Earth you're on is facing the sun, you have daytime. When the part of the Earth you're on is not facing the sun (facing the moon instead), you have nighttime.

I hope this helps!

Answer:Ca

Explanation:

These substances have dispersed particles that are large enough to scatter light, making the beam visible. Therefore, out of the options provided, a mixture that scatters light is an example of a colloid. Option B)

A colloid is a type of mixture in which particles are dispersed throughout a medium, creating a homogeneous appearance. Unlike solutions, where the particles are completely dissolved, and suspensions, where the particles settle out, colloids have particles that are larger than those in solutions but smaller than those in suspensions. One characteristic of colloids is that they can scatter light due to the size of the particles. This scattering of light is known as the Tyndall effect. Examples of colloids include milk, fog, and aerosol sprays. These substances have dispersed particles that are large enough to scatter light, making the beam visible. Therefore, out of the options provided, a mixture that scatters light is an example of a colloid. Therefore option B) is correct

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Note Complete Question

which is an example of a colloid?

a mixture that settles out,

b mixture that scatters light,

c mixture that is separated by filtration,  

d salt and water mixture?

The method employed to separate a mixture of volatile gases propane, butane, and isopropane is Chromatography. Distillation is used to separate a solution of isopropyl alcohol and water.

Chromatography is a technique employed for the separation of a mixture of chemical compounds into their individual element. There are two phases in this technique - the Mobile phase and the Stationary phase. The Stationary phase is usually either liquid or solid. The Mobile phase is either gas or liquid.

Chromatography is based on the principle that when the mixture is dissolved in a gas or liquid, it carries them to a stable substance (Stationary phase). Each element has a different speed at which they travel through them, and this interaction between them results in their separation.

The method used to separate alcohol and water is Fractional distillation. It is based on the difference in the boiling points of the mixture. Each element boils at a different temperature, this enables the separation of water and alcohol. Water boils at 100°C whereas alcohol boils at 78.7°C.

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Answer: 380 J. Please mark

Explanation:

Answer:

The volume of Component 1 is 36 cubic inches.

Explanation:

To calculate the volume of a composite solid, we need to determine the individual volumes of the different components and then add them together.

In this case, the composite solid consists of multiple components with the following dimensions:

Component 1:

Length: 4 inches

Width: 3 inches

Height: 3 inches

To find the volume of Component 1, we multiply the length, width, and height together:

Volume of Component 1 = Length x Width x Height = 4 in x 3 in x 3 in = 36 cubic inches

Therefore, the volume of Component 1 is 36 cubic inches.

Please provide the dimensions of the remaining components of the composite solid, and I will calculate the total volume by summing up the individual volumes.

Answer:

B

Explanation:

It's definetely not C and D, and A doesn't sound too reasonable too

The measured volume of hydrogen gas will be too high.

The volume of hydrogen is measured by collecting the gas over water. The volume of the gas is measured as the volume of water displaced by the gas in an inverted container.

When air leaks into the graduated cylinder, more volume of water is displaced hence a higher volume of hydrogen gas is measured.

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Answer:

a PE teacher would be in both catagories  of heath and fitness

Explanation:

Answer:

55 grams

Explanation:

 55 grams of calcium chloride is the equivalent weigh because 55 grams of calcium chloride would supply one mole of positive or negative charges when dissolved in water.

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Answer:

Molecules vibrate in a fixed position.

Explanation:

first one is just wrong.

third is liquid

fourth is gas

Explanation:

Molarity is an expression of the concentration of a solution. We define molarity as the relationship established between the amount of substance in the solute and the volume of a solution. It is expressed by the following formula:

M = n/V

where:

M = molarity (mol/L)

n = number of moles of the solute

V = volume of the solution

So the question tells us that sucrose is the solute.

To find out, we need to use the formula.

We have:

M = 0.150

n = we will find out

V = 350 mL = 0.35 L

So:

M = n/V

n = M*V

n = 0.15*0.35

n = 0.0525 moles

Answer: 0.0525 moles of sucrose

Answer:

\( \sqrt[.132 = ]{32 = ? = 1} = .82\)

Answer:

693 j

Explanation:

weight =75 g * specific heat of copper = .385j/g * change in temp = 24

= 693

Answer:

\(\huge\boxed{\sf Ribosomes}\)

Explanation:

\(\rule[225]{225}{2}\)

Answer:

23.85

Explanation:

is over of percent over 100

\(\frac{x}{159}\)x\(\frac{15}{100}\)

15 x 159 = 2385

2385 ÷ 100 = 23.85

If an athlete weighs 159 lb and has 15.0% % body fat by weight, the athlete's body contains approximately 23.84 pounds of fat.

To calculate the number of pounds of fat in the athlete's body, we can use the following steps:

Convert the athlete's weight from pounds to kilograms:

159 lb × 0.4536 kg/lb = 72.1224 kg

Calculate the weight of the athlete's body fat:

72.1224 kg × 0.150 = 10.81836 kg

Convert the weight of body fat from kilograms to pounds:

10.81836 kg × 2.2046 lb/kg = 23.8447 lb

Therefore, the athlete's body contains approximately 23.84 pounds of fat.

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Answer:

Limewater is a solution of calcium hydroxide. If carbon dioxide is bubbled through limewater, the limewater turns milky or cloudy white.

Explanation:

yea

Answer:

Limewater or calcium hydroxide.

Explanation:

Limewater is a solution of calcium hydroxide. CO2 is bubbled through limewater, the solution turns cloudy.

Answer:

Explanation:

bends when it passes through water

From the equation of te reaction, we know that the mass percent  of NaOH in the mixture is 1.4%.

Neutralization is a reaction that occurs between an acid and a base to yield salt and water only.

In tis case, the reaction of the NaOH and HCl occurs as follows; NaOH + HCl ----> NaCl + H2O

Number of moles of HCl reacted = 15/1000 * 0.5 moldm-³ = 0.0075 moles

Since the reaction is 1:1, 0.0075 moles of NaOH reacted.

Mass of NaOH =  0.0075 moles of NaOH * 40 g/mol = 0.3 g

Percent of NaOH = 0.3 g/21.10g * 100/1 = 1.4%

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Answer:

Metals, nonmetals, negative, gained lost, cation, anion, criss-cross

Explanation:

I'm taking this in Chemistry at the moment, so I know this.