A chemist has 2.0 mol of methanol (CH3OH). The molar mass of methanol is 32.0 g/mol. What is the mass, in grams, of the sample? 16 30 32 64

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asked May 24, 2022 44.3k views

2 Answers

Rich Sutton · Answer 1 · 2022-05-29T13:31:25+0000

Answer:

$\boxed {\boxed {\sf D. \ 64 \ grams }}$

Step-by-step explanation:

Given the moles, we are asked to find the mass of a sample.

We know that the molar mass of methanol is 32.0 grams per mole. We can use this number as a fraction or ratio.

$(32 \ g \ CH_3OH)/(1 \ mol \ CH_3OH)$

Multiply by the given number of moles, which is 2.0

$2.0 \ mol \ CH_3OH *(32 \ g \ CH_3OH)/(1 \ mol \ CH_3OH)$

The moles of methanol will cancel each other out.

$2.0 \ *(32 \ g \ CH_3OH)/(1 )$

The denominator of 1 can be ignored.

$2.0 * 32 \ g\ CH_3OH$

Multiply.

$64 \ g \ CH_3OH$

There are 64 grams of methanol in the sample.