1. A 36.0-gram sample of formaldehyde (CH20) contains 14.4 grams of carbon. How

many grams of carbon are in a 86.0-gram sample of this compound?

OA (36.0/14.4) x 86.0 grams

OB (14.4/36.0) x 86.0 grams

ec 14.4 grams

D (86.0/14.4) grams

14.4 / 36.0 * 86.0 = 34.4 g

Explanation:

Given dа ta:

Mass of carbon in 36 g of formaldehyde = 14.4 g

Mass of carbon in 86.0 g of formaldehyde = ?

Solution:

We will use cross multiplication to solve this problem.

14.4 / 36.0 = x / 86.0

x = mass of carbon in 86.0 g of formaldehyde

14.4 / 36.0 = x / 86.0

x = 14.4 / 36.0 * 86.0

x = 34.4 g