Sodium Chloride | MCQs

Explanation

salt (NaCl), sodium chloride, a mineral substance of great importance to human and animal health, as well as to industry. 

Formula: NaCl

Molar mass: 58.44 g/mol

Melting point: 801 °C

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ND30-12-2022

ND5-07-2023

Explanation

It is an ionic compound with the chemical formula NaCl.

It representing a 1:1 ratio of sodium and chloride ions. 

Table salt is the granulated white salt seen in most saltshakers.

It is typically mined from underground deposits.

It is commonly known as Sodium chloride.

Explanation

To calculate the molarity, we need to calculate the number of moles of sodium chloride (NaCl) dissolved in 500 cm³ (or 0.5 L) of solution.

Molar mass of NaCl = 58.44 g/mol

Number of moles = mass / molar mass = 40 g / 58.44 g/mol ≈ 0.684 mol

Molarity = number of moles / volume (in liters) = 0.684 mol / 0.5 L ≈ 1.368 M

Rounded to one decimal place, this is approximately 1.4M.

Explanation

The molar mass of sodium chloride (NaCl) is 58.44 g/mol.

To find the mass of 2 moles of NaCl, you can multiply the molar mass by 2: 2 mol × 58.44 g/mol = 116.88 g

Rounded to the nearest gram, this is approximately 117 grams.