Chemistry
19 May, 20:24

# An experiment calls for 7.57g of sugar. You have a sugar son that is 5% by weight (for every 100g there is 5g of sugar). How many mL of the sugar sold will be needed to deliver 7.57 g of sugar? The density of sugar is 1.157 g/mL. The molecular weight of sugar is 342 g/mol.

+1
1. 19 May, 23:04
0
mL sugar sold needed = 2.2215 mL sugar

Explanation:

mass sugar = 7.57 g

∴ wt% = 5% = (g sugar/g sln) * 100

⇒ 0.05 = g sugar/g sln

∴ g sln = 100 g

⇒ g sugar = 5 g

∴ δ sugar = 1.157 g/mL

⇒ mL sugar = (5 g) * (mL/1.157 g) = 4.322 mL

⇒ mL sugar needed = (7.57 g) / (1.157 g/mL) = 6.543 mL

mL of the sugar sold needed = 6.543 mL - 4.322 mL = 2.2215 mL sugar
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