James is preparing three solutions of salt water. Each of the solutions has the same amount of water in the beaker and a different amounts of salt. In the first beaker, there is one scoop of salt in the beaker. The second beaker has two scoops of salt. The third beaker has three scoops of salt. Which of the beakers is the most concentrated solution?

Answer:

Explanation:

To determine the volume of the stock solution required to prepare 3.50 L of 0.200 M hydro chloric acid, we can use the formula:

M1V1 = M2V2

where:

M1 = concentration of the stock solution

V1 = volume of the stock solution

M2 = desired concentration of the diluted solution

V2 = desired volume of the diluted solution

Let's substitute the given values into the formula:

M1 = 12.0 M

V1 = ?

M2 = 0.200 M

V2 = 3.50 L

Now we can solve for V1:

12.0 M x V1 = 0.200 M x 3.50 L

V1 = (0.200 M x 3.50 L) / 12.0 M

V1 = 0.0583 L

To convert the volume from liters to milliliters, we multiply by 1000:

V1 = 0.0583 L x 1000 mL/L

V1 = 58.3 mL

Therefore, the volume of the stock solution required is 58.3 mL.

So, the correct answer is d. 58.3 mL.

To determine the volume of the stock solution required, we can use the formula:

Molarity1 x Volume1 = Molarity2 x Volume2

Where Molarity1 and Volume1 represent the initial concentration and volume, and Molarity2 and Volume2 represent the final concentration and volume.

Given:

Molarity1 = 12.0 M

Volume1 = ?

Molarity2 = 0.200 M

Volume2 = 3.50 L

Plugging in the values into the formula, we have:

12.0 M x Volume1 = 0.200 M x 3.50 L

Simplifying the equation, we can solve for Volume1:

Volume1 = (0.200 M x 3.50 L) / 12.0 M

Volume1 ≈ 0.0583 L

To convert this to milliliters, we multiply by 1000:

Volume1 ≈ 58.3 mL

Therefore, the volume of the stock solution required is approximately 58.3 mL.

The closest answer option is d. 58.3 mL.

I hope this explanation helps! Let me know if you have any further questions.

Answer: Option (3) is the correct answer.

Explanation:

A reaction in which the concentration of reactants equal to the concentration of products is known as an equilibrium reaction.

For example,

Therefore, we can also say that in an equilibrium reaction rate of forward reaction becomes equal to the backward reaction.

The true statement about a system at equilibrium is that the forward reaction rate is equal to the reverse reaction rate.

What is equilibrium state?

Equilibrium state is that state in which the concentration of reactant as well as of producrs are constant. i.e. not changes.

Equilibrium state of any reaction will be represented by the double headed arrow as:

A + B ⇄ C + D

Given reaction defines that rate of forward reaction is equal to the rate of the backward reaction.

Hence option (3) is correct.

To know more about equilibrium state, visit he below link:

brainly.com/question/1495850

Answer:

The mass of iron needed will be 669.13 grams

Explanation:

The formula to be used here is that of specific heat equation which is

Q = mc Δt

where Q is the heat energy (in calories according to this question) = 1450 cal

m is the mass of the substance being heated (in this case Iron) = unknown

c is the specific heat of the substance (iron) = 0.11 cal/(g. °C)

Δt is the change in temperature in degree celsius = 19.7 °C

From the specific heat equation provided earlier, the mass of Iron needed can be calculated as

m = Q ÷ (c × Δt)

m = 1450 ÷ (0.11 × 19.7)

m = 1450 ÷ 2.167

m = 669.13 grams

The mass of iron needed will be 669.13 grams

NOTE: Kindly consider the units when solving. The reason for the choice of 0.11 cal/(g. °C) as specific heat is because the heat energy was in calories. If the heat energy was in joules, the specific heat of iron would have been different and the unit would have been j/(g. °C).