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SashulF [63]
3 years ago
11

Anne prepares a solution of copper nitrate with a concentration of 30 g/dm³. What mass of copper nitrate did she add to 100cm³ o

f water, in grams?
Chemistry
1 answer:
strojnjashka [21]3 years ago
7 0

Answer:

3 g

Explanation:

Concentration of copper nitrate needed = 30 g/dm³

Volume of water = 100 cm³ = 0·1 dm³

( ∵ 1 dm³ = 1000 cm³)

Let the mass of copper nitrate that should be added to 100 cm³ water be m g

m ÷ 0·1 = 30

∴ m = 3 g

∴ Mass of copper nitrate that should be added to 100 cm³ of water = 3 g

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4 years ago
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when the second T(1/2) = 20 sec, so to get K2:

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by substitution:

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4 years ago
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