How man moles of sodium phosphate are there in 0.4 liters of 0.1M Na2HPO4 (MW=141.96 g/mol)?
2.) How many millimoles in 200 ml?
mols = M x L = ?
millimols = M x mL = ?
Thanks!
To calculate the number of moles of sodium phosphate in a given volume and concentration, you can use the formula:
moles = volume (in liters) x concentration (in Molarity)
1. For the first question, you are given the volume (0.4 liters) and concentration (0.1 M) of sodium phosphate. To calculate the number of moles, you can use the formula:
moles = 0.4 L x 0.1 M
moles = 0.04 moles
Therefore, there are 0.04 moles of sodium phosphate in 0.4 liters of 0.1 M Na2HPO4.
2. For the second question, you are given the volume (200 ml) instead of liters. Before calculating the moles, you need to convert the volume to liters. There are 1000 milliliters (ml) in one liter, so you can use the conversion factor:
1 liter = 1000 ml
To convert 200 ml to liters, divide by 1000:
200 ml รท 1000 = 0.2 liters
Now you can use the formula to calculate the number of millimoles:
millimoles = volume (in liters) x concentration (in Molarity)
millimoles = 0.2 L x 0.1 M
millimoles = 0.02 millimoles
Therefore, there are 0.02 millimoles in 200 ml.