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Alla [95]
2 years ago
13

How many grams of H3PO4 are in 234 mL of a 2.5 M solution of H3PO4?

Chemistry
1 answer:
motikmotik2 years ago
5 0

Answer:

57 grams of H3PO4

Explanation:

M= moles/ liters

convert mL to L

234 mL x 1L/1000mL = 0.234L

Rearrange the Molarity formula to solve for moles.

moles= MxL

moles= 2.5M x 0.234L

moles= 0.585 mol

Use the molar mass of H3PO4 to get to grams

0.585 mol x 97.994 grams/1 mol = 57.326 grams of H3PO4

round to two sig figs for 57 grams

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ΔHreaction = 263.15 kJ/mol

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