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Helen [10]
2 years ago
9

Question 9 (2 points)

Chemistry
2 answers:
dezoksy [38]2 years ago
8 0
Pretty sure it’s 0.39 moles
KonstantinChe [14]2 years ago
7 0

Answer:

0.39 moles

Explanation:

To find how many moles are in 50.0 g of CaC₂O₄ you divide the grams of the sample by the molar mass of the compound;

\frac{50.0 g}{128.097 g/mol}=0.39 mol

The grams cancel out and you are left with moles!

I hope this help ^-^

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9.8ms^{-2}

Explanation:

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u is 0m/s

t is 10seconds

a=\frac{98m/s- 0m/s}{10} \\a=\frac{98}{10}\\ a=9.8m/s^{2}

3 0
2 years ago
A sample of a compound is analyzed and found to contain 0.420 g nitrogen, 0.480g oxygen, 0.540 g carbon and 0.135 g hydrogen. Wh
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Answer:

C2H5NO

Explanation:

constituent elements                    N              O               C                H

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mole ratio                                   0.42/14       0.48/16      0.54/12         0.135/1

                                              = 0.03                0.03             0.045         0.135

dividing by the smallest           0.03/0.03     0.03/0.03    0.045/0.03 0.135/0.03

ratio                                      =        1                      1                1.5                 4.5

                                             =        1                      1                  2                   5

EMPERICAL FORMULA = C2H5NO

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Answer:

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4 0
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