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algol13
2 years ago
15

4. *

Chemistry
1 answer:
crimeas [40]2 years ago
8 0
The answer would be A because it’s a byeeeee
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It is A) Condensation
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Question 13 of 32
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D

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Perform the following calculations to the correct number of significant figures.
SSSSS [86.1K]
Answer: 460.624

Explanation:
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Opal is a hydrated form of silica. If a laboratory analysis of a sample of opal reveals it to contain29.2% Si, 33.3%O, and 37.5%
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Let us assume that there is a 100g sample of Opal. The masses of each element will be:
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37.5g H2O
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O: (33.3 / 16) = 2.08
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3 years ago
Determine the mass of sodium carbonate required to produce 23.4g of sodium chloride when it reacts with excess hydrochloric acid
Leni [432]
The balanced chemical reaction for the described reaction above is,
                          Na2CO3 + 2HCl ---> 2NaCl + H2CO3
From the reaction, 1 mole of Na2CO3 is needed to produce 2 moles of NaCl. In terms of mass, 106 grams of Na2CO3 are needed to produce 116.9 grams of NaCl. From this,
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Thus, approximately 21.22 g Na2CO3 is needed for the desired reaction. 
8 0
3 years ago
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