Sam prepares a solution of sodium chloride with a concentration of 8 g/dm3. If he only used 2 g of sodium chloride, what volume of water did he dissolve it in, in cm3?
Question
Sam prepares a solution of sodium chloride with a concentration of 8 g/dm3. If he only used 2 g of sodium chloride, what volume of water did he dissolve it in, in cm3?
Solution
To find the volume of water Sam used, we need to use the formula for concentration which is:
Concentration = Mass / Volume
We know the concentration (8 g/dm3) and the mass (2 g) of sodium chloride used. We can rearrange the formula to solve for volume:
Volume = Mass / Concentration
Substitute the given values into the formula:
Volume = 2 g / 8 g/dm3 = 0.25 dm3
Since 1 dm3 is equal to 1000 cm3, we convert the volume to cm3:
Volume = 0.25 dm3 * 1000 = 250 cm3
So, Sam dissolved the 2 g of sodium chloride in 250 cm3 of water.
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