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kirill [66]
2 years ago
15

If I have 2 mol NaOH in 3 L of solution, what is the molarity of my solution?

Chemistry
1 answer:
qwelly [4]2 years ago
3 0

Answer:

0.67 mole/litre

Explanation:

the molarity equall no. of moles ÷ volume of sol.

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a compound has a molar mass of 129 g/mol if its empirical formula is C2H5N then what is the molecular formula
Elena-2011 [213]

Given :

A compound has a molar mass of 129 g/mol .

Empirical formula of compound is C₂H₅N .

To Find :

The molecular formula of the compound.

Solution :

Empirical mass of compound :

M_e = ( 2 \times 12 ) + ( 5 \times 1 ) + (  1  \times 14 )\\\\M_e = 43\ gram/mol

Now, n-factor is :

n = \dfrac{M}{M_e}\\\\n = \dfrac{129}{43}\\\\n = 3

Multiplying each atom in the formula by 3 , we get :

Molecular Formula, C₆H₁₅N₃

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