Question

Element Molar Mass (g/mol)

Answer 1

The number of moles of ethanol the chemist will use is 0.65 moles.

What is a mole?

A mole is the atomic weight of a molecule of chemical in grams

To calculate the number of moles of ethanol the chemist will use, we apply the formula below.

Formula:

• n = R'/M.............. Equation 1

Where:

• n = number of moles of ethanol
• m = mass of ethanol
• M = molar mass of ethanol

From the question,

Given:

• R' = 30 g
• M = [(12.01)+(1.01×3)+(12.01)+(1.01×2)+(16.0)+(1.01)] = 46.08 g/mol

Substitute these values into equation 1

• n = 30/46.08
• n = 0.65 moles.

Hence, The number of moles of ethanol the chemist will use is 0.65 moles.

Learn more about moles here: brainly.com/question/15356425

Answer 2

The number of moles of ethanol the chemist will use in the experiment involving 30g of ethanol is 0.65moles.

How to calculate number of moles?

The number of moles of a substance can be calculated by dividing the mass of the substance by its molar mass. That is;

no. of moles = mass ÷ molar mass

According to this question, a chemist will use a sample of 30 g of ethanol (CH3CH2OH) in an experiment. The number of moles can be calculated as follows:

Molar mass of ethanol = 12(2) + 1(5) + 17 = 46g/mol

no of moles = 30g ÷ 46g/mol

no. of moles = 0.65moles

Therefore, the number of moles of ethanol the chemist will use in the experiment involving 30g of ethanol is 0.65moles.

Learn more about moles at: brainly.com/question/1458253