What is the mass, in grams, of 0.250 mol K2CO3?

jug

Explanation:

34.55 g

Explanation:

n = m/mm

mm of k2co3 = 138.21 gmol

0.250 = m/(2 x 39.1) + 12.01 +(3 x 16)

0.250 mol = mass/ 138.21 gmol

mass = 0.25mol x 138.21 gmol

mass = 34.5525 g

mass = 34.55 (2dp) g

5 structural isomers

the isomers are:

n-exane :   ch3ch2ch2ch2ch2ch3

2-methylpentane :   ch3ch(ch3)ch2ch2ch3

3-methylpentane :   ch3ch2ch(ch3)ch2ch3

2,3-dimethylbutane :   (ch3)2chch(ch3)2

2,2-dimethylbutane :   (ch3)3cch2ch3