contestada

Element Molar Mass (g/mol)
carbon
12.01
hydrogen
1.01
oxygen
16.00
A chemist will use a sample of 30 g of ethanol (CH3CH2OH) in an experiment. In one to two sentences, make and justify a claim
about the number of moles of ethanol the chemist will use.

Respuesta :

samueladesida43

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: https://brainly.com/question/1458253

asuwafohjames

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: https://brainly.com/question/15356425

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