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maxonik [38]
3 years ago
6

g Which ONE of the following ionic compounds is insoluble in water? A) MgCO3 B) Li2CO3 C) NH4Br D) K3PO4 E) Pb(NO3)2

Chemistry
1 answer:
navik [9.2K]3 years ago
4 0

Answer:

A) MgCO₃ is insoluble

Explanation:

Based on the rules of solubility:

All nitrates are soluble. That means Pb(NO₃)₂ is soluble.

All ammonium ions are soluble. NH₄Br is soluble.

All phosphate are insoluble except when combined with group I ions (Li, Na, K...) K₃PO₄ is soluble.

Also, all carbonates are insoluble except when combined with group I ions. That means Li₂CO₃ is soluble and:

<h3>A) MgCO₃ is insoluble</h3>
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Answer:

The four characrteristics of warm blooded animals are÷

Explanation:

i=They can keep its body temperature the same no matter what the outside temperature .

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iv=They maintain their body temperature higher than environment.

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<h3>How to calculate moles?</h3>

The balanced chemical equation is

P_{4}  + 10Cl_{2}  = 4PCl_{5}

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The amount of clorine is n(Cl_{2}) = m(Cl_{2})/M(Cl_{2}) = 58/70.906 = 0.817 mol

The stoichiometric reaction,shows that

10 moles of Cl_{2} yield 4 moles of PCl_{5};

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n(PCl_{5}) = 4*0.817/10 = 0.3268 mol

To know more about stoichiometric reaction, refer:

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2 years ago
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The answer is option C.

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2. Different samples of the substance appeared to have different proportions of the components.

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Answer:

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