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Hoochie [10]
3 years ago
15

How many g are equal to 345.7mg?

Chemistry
2 answers:
Finger [1]3 years ago
5 0
The answer is 0.3457g equal to 345.7mg
Mumz [18]3 years ago
4 0

Answer:

0,3457 grams equal to 345.7mg

Explanation:

1000 mg-------1 g

345.7mg------x= (345.7mgx 1 g)/1000mg= <em>0,3457 g</em>

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Calculate the mass (grams) of 0.750 moles of Al2(Cr2O7)3
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Answer:

526g is the mass of this sample

Explanation:

To solve this question we must, as first, find the <em>molar mass </em>of Al₂(Cr₂O₇)₃ using the periodic table. The molar mass is defined as the mass of this compound per mole. With this value we can find the mass in 0.750 moles as follows:

<em>Molar mass Al₂(Cr₂O₇)₃</em>

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6 Cr = 6*51.9961g/mol = 311.9766g/mol

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53.96g/mol + 311.9766g/mol + 335.979g/mol

= 701.9156g/mol

The mass of 0.750 moles is:

0.750 moles * (701.9156g / mol) =

<h3>526g is the mass of this sample</h3>
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