Question

4.16 g of element W reacts with 1.92 g of oxygen to form metal oxide W. The

empirical formula for this metal oxide is W203. What is the relative atomic mass of
W?
[Relative atomic mass : 0 = 16]

A 27
B 52
C 56
D 104

Answer 1

Answer:
52 grams (B)

Step-by-step explanation:

Given: 4.16 grams of W
1.92 grams of O2

The reaction:
2W + 1.5 O2 ----> W2O3

We are gonna calculate the molar mass of W with ratios
So, to calculate that, we will multiply the moles by molar masses (O2: 1.5 * 32 & W: 2x) and divide the over the given masses and equating both fractions:


`(2x)/(4.16) = (1.5*32)/(1.92)`


`x = (1.5*32*4.16)/(2*1.92) = 52 grams`