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Nesterboy [21]
2 years ago
13

Convert 2.5 X 10^24 atoms of copper to grams of copper

Chemistry
1 answer:
viva [34]2 years ago
7 0

2.5 X 10²⁴ atoms of copper is equivalent to 266.7g of Cu.

HOW TO CALCULATE MASS:

  • The mass of a substance can be calculated by multiplying the number of moles of the substance by its molar mass. That is;

  • mass of substance (g) = no. of moles (mol) × molar mass (g/mol)

  • However, the number of moles of copper must first be calculated by dividing the number of atoms by Avogadro's number as follows:

  • no. of moles of Cu = 2.5 X 10²⁴ ÷ 6.02 × 10²³

  • no. of moles = 2.5/6.02 × 10²⁴-²³

  • no. of moles = 0.42 × 10¹

  • no. of moles = 4.2moles of copper.

  • Molar mass of copper = 63.5g/mol

  • Mass of copper = 4.2mol × 63.5g/mol

  • Mass of copper = 266.7g

Therefore, 2.5 X 10²⁴ atoms of copper is equivalent to 266.7g of Cu.

Learn more at: brainly.com/question/12154684?referrer=searchResults

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What is the equation for figuring out the Atomic Mass
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8 0
3 years ago
graduated cylinder is filled with water to a volume of 6.2 ML. an irregular shaped plastic object weighing 1.2 g is placed in th
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Answer:

A. Density of object = 0.86 g/mL

B. The object will float in the water.

Explanation:

The following data were obtained from the question:

Volume of water = 6.2 mL

Mass (m) of object = 1.2 g

Volume of water + Object = 7.59 mL

Density of object =?

Density of water = 1 g/mL

Next, we shall determine the volume of the object. This can be obtained as follow:

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Volume of object =?

Volume of object = (Volume of water + Object) – (Volume of water)

Volume of object = 7.59 – 6.2

Volume of object = 1.39 mL

Therefore, the volume of the object is 1.39 mL

A. Determination of the density of the object.

Mass (m) of object = 1.2 g

Volume (V) of object = 1.39 mL

Density (D) of object =?

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Density = 1.2/1.39

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B. Determination of whether the object will float or sink.

Density of object = 0.86 g/mL

Density of water = 1 g/mL

From the above, we can see that the density of water is greater than that of the object. This implies that the object is lighter than water. Therefore, the object will float in the water.

8 0
3 years ago
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