Question

What is the concentration (M) of a solution containing 29 grams of salt (NaCl) dissolved in 0.4 Liters of water?

Round your answer to the nearest hundredth (2 decimal places). Do NOT include units.

Answer 1

Step by step calculation:

Given:

Mass of NaCl = 29 grams

Volume of solution = 0.4 Liters

Molar mass of NaCl = 58.44 g/mol

Calculate number of moles of NaCl:

moles = mass/molar mass

moles = 29g / 58.44 g/mol

= 0.496 moles

Concentration (M) = moles / liters of solution

Concentration = 0.496 moles / 0.4 L

= 1.24 M

Since the answer is to be rounded to the nearest hundredth, the final concentration is:

1.24