3 years ago

A 0.465 g sample of an unknown compound occupies 245 mL at 298 K and 1.22 atm. What is the molar mass of the unknown compound?

1 answer:

5 0

Using the Ideal Gas Law
PV= nRT
PV = (m/Mr) RT The molar mass of the unknown compound is : 38.0 g/mol

Mr = mRT / PV = 0.465 g x 0.08206 L * atm * K⁻¹ mol ⁻¹ x 298 K / 1.22 atm x 0.245 L = 38.0 g / mol

everything else but G / Mol are cancelled out.

You might be interested in

33. A basketball bounces on the gym floor nine times and finally comes to a rest. Which of these BEST explains why the

kkurt [141]

The answer is A. good luck.

3 0

3 years ago

What components did you collect to convert your two molecules of pyruvate to acetyl-coa?

GenaCL600 [577]

<span>You need to have NAD+ as a source of oxidation for the pyruvate, as well as a supply of coenzyme A. CO2 is released by the pyruvate as a carboxyl group is removed</span>

5 0

3 years ago

Are the chemical reactions that take place when a battery connected endothermic or exothermic

Vilka [71]

Answer:

The answer is endothermic as the heat flows into the system from the surroundings. The products are at higher energy than the reactants, as they have absorbed energy.

8 0

3 years ago

When 2-phenylacetaldehyde is added dropwise to benzaldehyde in the presence of sodium hydroxide they undergo a crossed aldol rea

egoroff_w [7]

Carbonyl Compounds containing alpha proton readily donates alpha acidic proton when treated with strong Base. In given statement <span>2-phenylacetaldehyde is converted into Enolate and Enolates acts as a nucleophile and attacks carbonyl group of Benzaldehyde. The mechanism of given reaction is as follow, the movement of electrons is shown by RED arrows,</span>

7 0

3 years ago

In a chemical reaction, water decomposes to form hydrogen and oxygen. What is the correct term for the water?

gulaghasi [49]

The answer is: [D]: a reactant.
________________________

7 0

3 years ago

Read 2 more answers