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rusak2 [61]
3 years ago
13

Describe a process that may have produced the moon

Chemistry
1 answer:
vaieri [72.5K]3 years ago
6 0
The Giant-Impact theory. People basically believed that the moon was created from the collision between earth and another small planet:)
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Explain how you would decide which represents a greater mass: 3.25 x 1022 atoms of Ca or 2.45 grams of Mg?
elena55 [62]

Answer:

  • <u>You need to convert the number of atoms of Ca into mass in grams, using Avogadro's number and the atomic mass of Ca.</u>

Explanation:

The amount of matter is measured in grams. Thus, you need to convert the number of atoms of Ca (calcium) into mass to compare with 2.45 grams of Mg.

To convert the atoms of calcium into mass, you divide by Avogadro's number, to obtain the number of moles of atoms, and then divide by the atomic mass of calcium.

<u />

<u>1. Number of moles, n</u>

      n=\dfrac{\text{number of atoms}}{\text{Avogadro's number}}\\ \\ \\ n=\dfrac{3.25\times 10^{22}}{6.022\times 10^{23}}=0.053969mol

<u />

<u>2. Mass</u>

  • mass = number of moles × atomic mass
  • mass = 0.053969mol × 40.078g/mol = 2.16g

Then, 2.45 g of Mg represent a greaer mass than the 3.25 × 10²² atoms of Ca.

4 0
3 years ago
How some solutions can conduct electricity while others not?
agasfer [191]

Answer:

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what is the most appropriate unit to measure the following; the length of a football field. b) the diameter of a tennis ball​
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Explanation:

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6 0
3 years ago
When an object is lifted 6 meters off the ground, it gains a certain amount of potential energy. If the same object is lifted 18
AlexFokin [52]

Answer:

The answer to your question is the letter C. three times as much

Explanation:

Data

First step = 6 m

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Potential energy is the energy stored that depends on its position.

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Potential energy of the first step

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Potential energy of the second step

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-Divide the Pe2 by the Pe1

        Pe2/Pe1 = 18mg/6mg

                       = 3

7 0
3 years ago
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