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garik1379 [7]
3 years ago
11

3.

Chemistry
1 answer:
Dovator [93]3 years ago
6 0

Answer : The number of grams of calcium perchlorate is, 0.00253 grams.

Explanation :

Molar mass of calcium perchlorate = 238.9 g/mol

As, 6.022\times 10^{23} formula units present in 238.9 g of calcium perchlorate

So, 6.37\times 10^{18} formula units present in \frac{6.37\times 10^{18}}{6.022\times 10^{23}}\times 238.9=0.00253g of calcium perchlorate

Therefore, the number of grams of calcium perchlorate is, 0.00253 grams.

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I need this answer quick please show work
Ainat [17]

Answer:

The answer to your question is 25.2 g of acetic acid.

Explanation:

Data

[Acetic acid] = 0.839 M

Volume = 0.5 L

Molecular weight = 60.05 g/mol

Process

1.- Calculate the number of moles of acetic acid

    Molarity = moles / volume

-Solve for moles

    moles = Molarity x volume

-Substitution

    moles = (0.839)(0.5)

-Result

    moles = 0.4195

2.- Calculate the mass of acetic acid using proportions and cross multiplications

                   60.05 g ----------------------- 1 mol

                        x        ----------------------- 0.4195 moles

                        x = (0.4195 x 60.05) / 1

                        x = 25.19 g

3.- Conclusion

25.2 g are needed to prepare 0.500 L of Acetic acid 0.839M

               

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