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Ivenika [448]
3 years ago
5

feel free to answer any of these. i need the answer to the appropriate amount of significant figures on this pleasee

Chemistry
1 answer:
jekas [21]3 years ago
4 0

Answer:

6. (2.7*10^{5})

8. (1.0*10^{4})

Explanation:

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Sonja [21]

Answer:

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5 0
3 years ago
Which of the following is NOT a characteristic of a compound?
MissTica

Answer:

I think it's D

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Explanation:

4 0
3 years ago
Calcium oxide or quicklime (CaO) is used in steelmaking, cement manufacture, and pollution control. It is prepared by the therma
Elena-2011 [213]

Answer:

The yearly release of CO_2 into the atmosphere is 6.73\times 10^{10} kg.

Explanation:

CaCO_3(s)\rightarrow CaO(s) + CO_2(g)

Annual production of CaO = 8.6\times 10^{10} kg=8.6\times 10^{13} g

Moles of CaO :

\frac{8.6\times 10^{13} g}{56 g/mol}=1.53\times 10^{12} moles

According to reaction, 1 mole of CaO is produced along with 1 mole of carbon-dioxide.

Then along with  1.53\times 10^{12} moles of CaO moles of carbon-dioxide moles produced will be:

\frac{1}{1}\times 1.53\times 10^{12} moles=1.53\times 10^{12} moles of carbon-dioxide

Mass of 1.53\times 10^{12} moles of carbon-dioxide:

1.53\times 10^{12}mol\times 44 g/mol=6.73\times 10^{13} g =6.73\times 10^{10} kg

The yearly release of CO_2 into the atmosphere is 6.73\times 10^{10} kg.

6 0
3 years ago
LIH2PO4 i dont know how to do this mabey you can help me figure it ou???
inessss [21]
Lithium dihydrogen phosphate
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2 years ago
Coal and petroleum are alike in which fundamental way?
Dovator [93]
Coal a is a chemical compound. It is pure carbon. You cannot separate carbon into other molecules without changing its chemical consitution.

Petroleum is a mixture of many chemical compounds, hydrocarbons, plus other elements. Petroleum components contain carbon, hydrogen, oxygen, nitrogen, sulfur, and some metal traces. The different compounds that consitute the petroleum can be separated by physical media like distillation.
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3 years ago
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