Question

The chemical formula for hydrogen bromide is HBr.

A chemist determined by measurements that 0.0600 moles of hydrogen comide participate in a chemical reaction. Calculate the mass of
hydrogen bromide that participates.
Round your answer to 3 significant digits.
08
X
5

Answer 1

4.85 grams HBr

Step-by-step explanation:

To find the mass of hydrogen bromide (HBr), you need to multiply the given moles by the molar mass. The molar mass of HBr is a ratio which compares the mass (g) of HBr per every 1 mole. It is important to arrange the ratio in a way that allows for the cancellation of units (moles should be in the denominator).

Molar Mass (HBr): 1.008 g/mol + 79.904 g/mol

Molar Mass (HBr): 80.912 g/mol

0.0600 moles HBr 80.912 g
------------------------------ x -------------------- = 4.85 grams HBr
1 mole