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Rzqust [24]
3 years ago
6

A pharmaceutical company states in advertisements that their new ScarX Cream is guaranteed to erase scars in one month.

Chemistry
1 answer:
SOVA2 [1]3 years ago
7 0

Answer:d

Explanation:

the results indicated

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PLEASE HELP What's the mass in grams of 0.442 moles of calcium bromide, CaBr2? The atomic
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Answer: Thus there are 88.4 g of calcium bromide.

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to the molecular mass and contains avogadro's number 6.023\times 10^{23} of particles.

Molar mass of = 40.1 (1)+ 2(79.9) = 199.9  

To calculate the moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}

0.442=\frac{x}{199.9}

x=88.4g

Thus there are 88.4 g of calcium bromide.

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The element silver exists in nature as two isotopes: 107Ag has a mass of 106.9051 u, and 109Ag has a mass of 108.9048 u. The ave
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