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2 years ago

Predict the reactants of this chemical reaction. That is, fill in the left side of the chemical equation.

Chemistry

1 answer:

Troyanec [42]2 years ago

4 0

Answer: $Ca(OH)_2+2HCl\rightarrow CaCl_2+2H_2O$

Explanation:

Neutralization is a chemical reaction where an acid reacts with a base to form salt and water.

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side.

The balanced chemical equation will be:

$Ca(OH)_2+2HCl\rightarrow CaCl_2+2H_2O$

Thus the reactants are calcium hydroxide $(Ca(OH)_2$ and hydrochloric acid $(HCl)$

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At a certain temperature the vapor pressure of pure acetic acid HCH3CO2 is measured to be 226.torr. Suppose a solution is prepar

Rudiy27

Answer:

The partial pressure of acetic acid is 73.5 torr

Explanation:

Step 1: Data given

Total pressure is 226 torr

mass of acetic acid = 126 grams

mass of methanol = 141 grams

Step 2: Calculate moles of acetic acid

moles acetic acid = mass acetic acid / molar mass acetic acid

moles acetic acid = 127 grams / 60.05 g/mol

moles acetic acid = 2.115 moles

Step 3: Calculate moles of methanol

moles methanol = 141 grams / 32.04 g/mol

moles methanol = 4.40 moles

Step 4: Calculate total moles

Total moles = moles of acetic acid + moles methanol

Total moles = 2.115 moles + 4.40 moles

Total moles = 6.515 moles

Step 5: Calculate mole fraction of acetic acid

2.115 moles / 6.515 moles = 0.325

Step 6: Calculate partial pressure of acetic acid

P(acetic acid) = 0.325 * 226

P(acetic acid) = 73.45 torr ≈73.5

We can control this by calculating the partial pressure of methanol

mole fraction of methanol = (6.515-2.115)/6.515 = 0.675

P(methanol) = 0.675 * 226 = 152.55

226 - 152.55 = 73.45 torr

The partial pressure of acetic acid is 73.5 torr

4 0

3 years ago

Why is scientific notation useful?

BlackZzzverrR [31]

It condenses very long strings of numbers while retaining the general accuracy of the figure.

8 0

3 years ago

Read 2 more answers

Please help

Snezhnost [94]

Relatively few hydrogen atoms

5 0

3 years ago

A student measures the pressure and volume of an empty water bottle to be 1. 4 atm and 2. 3 l

rewona [7]

The new volume of the bottle is 5.07 L.

<h3>What is Boyle's Law?</h3>

It is a gas law that states the pressure decrease with the increase in the pressure.

By the formula

$\rm P_1V_1= P_1V_2$

Given that, volume1 is 2.3l

Pressure1 is 4 atm.

Pressure2 to 0.65 atm.

V2 is to find?

Putting the values in the equation

$\rm 1.4\times 2.3 = 0.65 \times V_2\\\\V_2 = 5.07 L$

Thus, the new volume of the bottle is 5.07 L.

Learn more about Boyle's Law

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6 0

1 year ago

Which of the following is a reasonable way of describing the density of a gas at STP

dedylja [7]

Answer:the answer is a

Explanation:

8 0

2 years ago