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dolphi86 [110]
3 years ago
13

How many atoms are in 165 g of calcium?

Chemistry
2 answers:
vesna_86 [32]3 years ago
7 0

             <span> Find the molar mass of calcium acetate...158.165g.
So start with 255g Calcium acetate x 1 mole Calcium Acetate/158.165 g Calcium Acetate x 6 mol Hydrogen/1 mole Calcium Acetate x 6.022e23 atoms/mole.

So...(255 x 1 x 6 x 6.022e23)/(158.165 x 1 x 1) = 5.825e24 hydrogen atoms</span>

<span />

Romashka [77]3 years ago
5 0
Moles in165g = 165 / 40 = <span><span>N/<span>6.02×10^23</span></span></span>
<span>N=2.48325×<span>10^24
hope it helps<span /></span></span>



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Can someone help me with the question in the image? if it is correct i will mark as brainliest
Debora [2.8K]

Answer:

I would think the correct answer would be B and D.  

Explanation:

The information the institutions gathered doesn't tell whether the temperature increased or decreased so it couldn't be A. And the data that is gathered by each institute is similar to one another, so it couldn't be C. Therefore, you're left with B and D.

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3 years ago
The sum of the oxidation numbers of all atoms in a neutral compound is
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How many moles are in 25.3 g of a sample of potassium nitrate (KNO3)?
aksik [14]

Answer:

25.3 g of KNO₃ contain 0.25 moles.

Explanation:

Given data:

Number of moles of KNO₃ = ?

Mass of KNO₃ = 25.3 g

Solution:

Formula:

Number of moles = mass/ molar mass

Molar mass of KNO₃:

KNO₃ = 39 + 14+ 16×3

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Now we will put the values in formula.

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8 0
3 years ago
Solid potassium chlorate decomposes upon heating to form
olga55 [171]

Answer:

32.6%

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since the gas was collected over water,

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0.976 = 0.04184211 atm + pressure of oxygen gas at 30°C

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V2 = \frac{P1V1T2}{T1P2}

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0.66411 will yield = \frac{245.2 * 0.66411}{67.2}  = 2.4232 g

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3 0
3 years ago
How to calculate moles
blondinia [14]

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