2 years ago

Select the correct answer.

1 answer:

7 0

Answer:

No, because the number of carbon, hydrogen & oxygen atoms on both sides of the equation are not equal.

Hope this helps!

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Otrada [13]

It is -2 because the charge will be at zero and electrons lower the charge

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2 years ago

makkiz [27]

Answer:

Percent yield of SiC is 77.0%.

Explanation:

Balanced reaction: $SiO_{2}+3C\rightarrow SiC+2CO$

Molar mass of SiC = 40.11 g/mol

Molar mass of $SiO_{2}$ = 60.08 g/mol

So, 100.0 kg of $SiO_{2}$ = $\frac{100.0\times 10^{3}}{60.08}$ moles of $SiO_{2}$ = 1664 moles of $SiO_{2}$

According to balanced equation, 1 mol of $SiO_{2}$ produces 1 mol of SiC

Therefore, 1664 moles of $SiO_{2}$ produce 1664 moles of SiC

Mass of 1664 moles of SiC = $(1664\times 40.11)g$ = 66743g = 66.74 kg (4 sig. fig.)

Percent yield of SiC = [(actual yield of SiC)/(theoretical yield of SiC)] $\times 100$ %

= $\frac{51.4kg}{66.74kg}\times 100$ %

= 77.0%

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2 years ago

zaharov [31]

When a meteroid goes into the atmosphere the friction starts slowing it down and generating heat.

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alekssr [168]

90% of energy is lost. only 10% is left.

therefore the answer is B. 90%

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3 years ago

lozanna [386]

105 neutrons. hope this helps

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2 years ago