If 156 grams of chromium react with an excess of oxygen, as shown in the balanced chemical equation below, how many grams of chr

Question

2 years ago

13

omium oxide can be formed? (1 point) 4Cr + 3O2 yields 2Cr2O3

1 answer:

Sunny_sXe [5.5K] · Answer 1 · 2022-07-22T23:01:57+03:00

Answer:

=759.95 grams.

Explanation:

The molar mass of chromium is 51.9961 g/mol

Therefore the number of moles of chromium in 156 grams is:

Number of moles =mass/RAM

=156g/51.9961g/mol

=3 moles.

From the equation provided, 3 moles of chromium metal produce 2 moles of Chromium oxide.

Therefore 3 moles of chromium produce:

(3×2)/4 moles =1.5 moles of chromium oxide.

I mole of chromium oxide has a mass of 151.99 g

Thus 1.5 moles= 1.5mole ×151.99 g/mol

=759.95 grams.