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lawyer [7]
3 years ago
12

The percent by mass of copper in CuBr2 is Use mc004-1.jpg. 28.45%. 44.30%. 63.55%. 71.55%.

Chemistry
2 answers:
maxonik [38]3 years ago
8 0

i believe it is A on e2020

Greeley [361]3 years ago
3 0
First, we must find the total mass of CuBr₂:
Mass = 64 + 2 x 80
Mass = 224

Percentage mass of copper = mass of copper x 100 / total mass
Percentage mass of copper = (64 / 224) x 100
Percentage mass of copper = 28.45%
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What is the mass of sodium (Na) in 50 grams of table salt (NaCl)? Show your work.
Anvisha [2.4K]

Answer:

19 g

Explanation:

Data Given:

Sodium Chloride (table salt) = 50 g

Amount of sodium (Na) = ?

Solution:

Molecular weight calculation:

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Mass contributed by Sodium = 23 g

calculate the mole percent composition of sodium (Na) in sodium Chloride.

Since the percentage of compound is 100

So,

                 Percent composition of sodium (Na) = 23 / 58.5 x 100

                  Percent of sodium (Na) = 39.3 %

It means that for ever gram of sodium chloride there is 0.393 g of Na is present.

So,

for the 50 grams of table salt (NaCl) the mass of Na will be

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6 0
4 years ago
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Kaylis [27]

Answer:

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