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vivado [14]
2 years ago
5

Which of the following yields a basic solution when dissolved in water? I. Nh3 ii. Na2o iii. Lioh iv. P4o10

Chemistry
1 answer:
emmainna [20.7K]2 years ago
8 0

<u>Answer:</u> The correct answer is Option 1, Option 2 and Option 3.

<u>Explanation:</u>

A base is defined as the substance which releases hydroxide ion when dissolved in water.

For the given options:

  • <u>Option 1:</u>  NH_3

When ammonia is dissolved in water, it produces ammonium hydroxide which forms a basic solution.

NH_3+H_2O\rightarrow NH_4OH

  • <u>Option 2:</u>  Na_2O

When sodium oxide is dissolved in water, it produces ammonium hydroxide which forms a basic solution.

Na_2O+H_2O\rightarrow 2NaOH

  • <u>Option 3:</u>  LiOH

When lithium hydroxide is dissolved in water, it produces aqueous lithium hydroxide which forms a basic solution.

LiOH+H_2O\rightarrow LiOH(aq.)

  • <u>Option 4:</u>  P_4O_{10}

When phosphorus pentoxide is dissolved in water, it produces phosphoric acid which forms an acidic solution.

P_4O_{10}+6H_2O\rightarrow 4H_3PO_4

Hence, the correct answer is Option 1, Option 2 and Option 3.

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Answer:

Explanation has been given below.

Explanation:

  • Chloroform has three polar C-Cl bonds. Methylene chloride has two polar C-Cl bonds. So it is expected that chloroform should be more polar and posses higher dipole moment than methylene chloride.
  • Two factors are liable for the opposite trend observed in dipole moments of methylene chloride and chloroform.
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3 0
2 years ago
The recommended daily allowance (rda of calcium is 1.2 g. calcium carbonate contains 12.0% calcium by mass. how many grams of ca
defon
1) Calcium carbonate contains 40.0% calcium by weight.
M(CaCO₃)=100.1 g/mol
M(Ca)=40.1 g/mol
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2) Mass fraction of this is excessive data.

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m(CaCO₃)=M(CaCO₃)*m(Ca)/M(Ca)

m(CaCO₃)=100.1g/mol*1.2g/40.1g/mol=3.0 g
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