Question

A sample of pure compound contains 1.15 g of sodium, 3.01 × 1022 atoms of carbon and 0.1 mol
of oxygen atom. Its empirical formula is

Answer 1

Answer:

The parathyroid hormone (PTH), secreted by the parathyroid glands, is responsible for regulating blood calcium levels; it is released whenever blood calcium levels are low. PTH increases blood calcium levels by stimulating osteoclasts, which break down bone to release calcium into the blood stream.

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Answer 2

Answer:-

Empirical formula of the compound

is NaCO₂ .

Explanation:-

• Molar mass of sodium = 23g/mol

• Avogadro Number = 6.022×10²³

Let us calculate the molar ratio of each type of atoms.

Number of moles in 1.15g of Sodium (Na):-

= Given Mass / Molar mass

= 1.15/23

= 0.05 mole

Number of moles in 3.01×10²² atoms of

Carbon (C) :-

= No of atoms / Avogadro Number

= 3.01×10²²/6.022×10²³

= 0.5/10

= 0.05 mole

Number of moles of Calcium atom = 0.1

The atomic ratio of Na : C : O is :-

= 0.05 : 0.05 : 0.1

• Least value = 0.05

Now, we will divide each value by the least value.

=> [0.05/0.05] : [0.05/0.05] : [0.1/0.05]

=> 1 : 1 : 2

Thus, the empirical formula is NaCO₂ .