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Arturiano [62]
3 years ago
12

WHEN IN FRICTION not useful

Chemistry
1 answer:
Paladinen [302]3 years ago
6 0
Friction is not useful in Machinery sometimes, Since it leads to the wear and tear of machine parts.
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Charles Darwin's theory of evolution describes how species evolve due to natural selection. Which of these is NOT evidence of na
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b

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mint plant varieties are crossed to express desirable traits

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How many atoms are present in 98.1 grams of Ar? You may report your numerical answer in scientific notation use e-notation.
Andrei [34K]

Answer:

1.48 × 10²⁴ atoms

Explanation:

Step 1: Calculate the moles of argon

Argon is a noble gas, whose molar mass is 39.95 g/mol. We will use this data to find the moles corresponding to 98.1 grams of argon.

98.1g \times \frac{1mol}{39.95g} =2.46 mol

Step 2: Calculate the atoms of argon

In order to calculate the number of atoms of argon in 2.46 moles of argon, we have to consider the Avogadro's number: there are 6.02 × 10²³ atoms of Ar in 1 mole of Ar.

2.46mol \times \frac{6.02 \times 10^{23}atoms  }{1mol} = 1.48 \times 10^{24}atoms

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3 years ago
What are the sub-particles that make up an atom? (select all that apply) *?
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1. The name of this element is Carbon because there are 6 electrons in the shell.

2. Sorry I didn't learn that. And I don't know.

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4. Neutron = no charge

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6. An atom is bigger. Because electrons are what takes up space in atoms, the result is that the size of the biggest filled orbital determines the size of the atom or ion.

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