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Marina86 [1]
3 years ago
15

Is the lithosphere a solid rock or a liquid rock

Chemistry
1 answer:
maks197457 [2]3 years ago
7 0
Uhhaoah....it liquid
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The correct answer is G
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3 years ago
1. How many molecules of barium hydroxide, Ba(OH)2 are there in 21.9 grams of
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Answer: 7.7\times 10^{22} molecules of Ba(OH)_2

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number 6.023\times 10^{23} of particles.

To calculate the moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}=\frac{21.9g}{171g/mol}=0.128moles

1 mole of Ba(OH)_2 contains =  6.023\times 10^{23} molecules

0.128 mole of Ba(OH)_2 contains =  \frac{6.023\times 10^{23}}{1}\times 0.128=7.71\times 10^{22} molecules

Thus there are 7.7\times 10^{22} molecules of Ba(OH)_2

3 0
3 years ago
What are 3 main ways an object can accelerate
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