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Svetlanka [38]
3 years ago
10

How many moles are in 2.8x10^23 atoms of Calcium?

Chemistry
1 answer:
Zielflug [23.3K]3 years ago
8 0

Answer: 1 mole ➡️ 6.022×10²³ atoms of si.

X mole ➡️ 2.8×10²⁴ atoms of si.

X = 2.8×10×10²³/6.022×10²³

= 28/6.022

= 4.65 moles.

Explanation:

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The electrons in the outer shell of an atom are called:<br> outer<br> ionized<br> polar<br> valence
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Valence.

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The reaction that occurs in a Breathalyzer, a device used to determine the alcohol level in a person's bloodstream, is given bel
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Answer:

The rate of disappearance of C₂H₆O = 2.46 mol/min

Explanation:

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The rate of appearance of Cr₂(SO₄)₃ in that particular moment is given 1.64 mol/min. This would than means that C₂H₆O must be used up at a rate which is approximately equal to their mole ratios. Thus,  the rate of of the disappearance of C₂H₆O can be calculated from the mole ratio of Cr₂(SO₄)₃ and C₂H₆O.

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4 0
3 years ago
a student determined that 8.2 milligrams of oxygen is dissolved in a 1000 gram sample of water at 15 degrees Celsius and 1 atm w
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8 0
3 years ago
How to know if a metal reacted with an acid
enot [183]

Answer: Hydrogen gas will be given off

Explanation:

Whenever a metal reacts with an acid, a salt of the metal is formed and hydrogen gas is given off.

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From the equation provided, hydrogen gas is given off as a by-product

5 0
3 years ago
Read 2 more answers
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