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NeTakaya
3 years ago
12

how many grams of sodium carbonate must react with 222 g of calcium chloride to make 233 grams of sodium chloride and 201 grams

of calcium carbonate?
Chemistry
1 answer:
inessss [21]3 years ago
5 0

Answer: 212 g  of sodium carbonate must react

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products formed must be equal to the mass of reactants taken.

In order to get the same mass on both sides, the atoms of each element must be balanced on both sides of the chemical equation.

The balanced chemical equation is:

Na_2CO_3+CaCl_2\rightarrow 2NaCl+CaCO_3

Mass of products = mass of  sodium chloride + mass of  calcium carbonate = 233 g+ 201 g= 434 g

Mass of reactants= mass of sodium carbonate  + mass of calcium chloride =x + 222 g

As the mass of reactants should be equal to mass of products

434  = x  + 222 g

x = 212 g

Thus 212 g  of sodium carbonate must react with 222 g of calcium chloride to make 233 grams of sodium chloride and 201 grams of calcium carbonate

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Determine the mass in grams of 5.15 × 10²¹ atoms of chromium. (The mass of one mole of chromium is 52.00 g.)
Dennis_Churaev [7]

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From Avogadro's hypothesis,

6.02×10²³ atoms = 1 mole of Cr

But:

1 mole of Cr = 52 g

Thus, we can say that:

6.02×10²³ atoms = 52 g of Cr

With the above information, we can obtain the mass of 5.15 × 10²¹ atoms of chromium. This can be obtained as follow:

6.02×10²³ atoms = 52 g of Cr

Therefore,

5.15×10²¹ atoms = (5.15×10²¹ × 52) / 6.02×10²³

5.15×10²¹ atoms = 0.44 g of Cr

Thus, the mass of 5.15 × 10²¹ atoms of chromium is 0.44 g

Learn more: brainly.com/question/15488332

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2 years ago
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Explanation:

4 0
4 years ago
You are asked to make 500 mL of a 0. 250 M sodium chloride (NaCl) solution.
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Answer:

a. .125 mol b. 7.25g

Explanation:

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