Molecular mass of butane

Answer 1

The molecular structure for 2,2-dimethylbutane is C6H14.

How to get: 2,2-dimethylbutane

• first to help you write the molecular formula you need to write the structural formula
• 2,2- tells you to put both methyl groups on the second carbon atom in the structural formula
• the prefix di- tells you that there are two methyl groups
• the prefix but- tells you that the longest chain of carbon atoms is four
• the suffix -ane tells you that there are only single bonds throughout the compound

After getting your structual formula wrote down, count up all the carbon atoms. You should get six. Then count all your hydrogen atoms. You should get fourteen.

Answer 2

2-methylpropane is CH3-CH(CH3)-CH3 , one of the butane isomers called isobutane, so it is C4H10.

The molar mass is 4*12.00 + 10*1.008 = 48.00 + 10.08 = 58.08 g/mole

Answer 3

The molecular mass of butane (C4H10) is 58.12 g/mol.

Answer 4

A molecule of butane contains four carbon atoms and ten hydrogen atoms. Their atomic masses are 12 and 1 respectively. Therefore the molecular mass of butane is 4x12+10x1=58u.

Answer 5

The molar mass of 2-methylbutane is 72,15.

Answer 6

72.1488 grams/mol

Answer 7

86.18 g mol-1

Answer 8

72.15 grams/mole

Answer 9

72.11 grams/mole

Answer 10

72.15grams