2 years ago

A salt lover decided to flavor her meal by adding 2.50 moles of sodium chloride,

Chemistry

1 answer:

FromTheMoon [43]2 years ago

4 0

Answer: C, 146

Explanation:

NaCl has a molar mass of 58.44 g/mol.

To change moles to g, we do:

2.50 moles × 58.44 g/mol = 146.1 g, so C

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An alloy of bronze is manufactured by melting 51.2 g of copper with 6.84 g of tin. What is the percent copper in the bronze?

Harlamova29_29 [7]

Answer:

Percentage of copper = 88%

Explanation:

Given data:

Mass of copper = 51.2 g

Mass of tin = 6.84 g

Percentage of copper = ?

Solution:

Formula:

Percentage of copper = mass of copper / total mass × 100

Now we will determine the total mass:

Total mass = mass of copper + mass of tin

Total mass = 51.2 g + 6.84 g

Total mass = 58.04 g

Now we will calculate the percentage of copper.

Percentage of copper = 51.2 g / 58.04 g × 100

Percentage of copper = 0.88 × 100

Percentage of copper = 88%

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Dima020 [189]

Answer:

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