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Montano1993 [528]
2 years ago
12

Which inner planet has 2 moons? Question 2 options: Mercury Venus Earth Mars

Chemistry
1 answer:
MaRussiya [10]2 years ago
5 0

Answer:

Mars

Explanation:

neither Mercury nor Venus have any moons at all, Earth has one and Mars has its two small moons

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When 2.3 × 10^3 g of CaCO3 are heated, the actual yield of CaO is 1.09 × 10^3g. What is
iren [92.7K]

The percent yield : 4. 84.58%

<h3>Further explanation</h3>

Reaction

CaCO₃ ⇄ CaO+CO₂

mass CaCO₃ = 2.3 × 10³ g

mol CaCO₃ (MW=100.0869 g/mol) :

\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{2.3\times 10^3}{100,0869}\\\\mol=22.98

From the equation, mol CaCO₃ : CaO = 1 : 1, so mol CaO=22.98

mass CaO(MW=56.0774 g/mol)⇒ (theoretical) :

\tt mass=mol\times MW\\\\mass=22.98\times 56,0774\\\\mass=1288.659~g

The percent yield :

\tt \%yield=\dfrac{actual}{theoretical}\times 100\%\\\\\%yield=\dfrac{1090}{1288.659}\times 100\%\\\\\5yield=84.58\%

5 0
3 years ago
What is the systematic name of PbO?
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I hope this helped
6 0
3 years ago
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alekssr [168]
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Which is most likely to happen during a precipitation reaction?
Salsk061 [2.6K]

Answer:

I think its B

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Iron III sulfide is classified as what type
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