Question

Сколько молей воды содержится в сосуде объемом 7,2л? Молярная масса воды 0,0018кг/моль , плотность воды 1000кг/м^3

Answer 1

M=p*V
v=m/M=p*V/M=1000*7,2*10^-3/18*10^-3=400 моль

Answer 2

Calculation of the Number of Moles of Water

To calculate the number of moles of water in a container with a volume of 7.2 liters, we need to use the molar mass of water and the density of water.

Given: - Molar mass of water = 0.0018 kg/mol - Density of water = 1000 kg/m^3 - Volume of the container = 7.2 liters

To find the number of moles of water, we can use the formula:

Number of moles = Mass / Molar mass

First, we need to calculate the mass of water in the container. We can do this by multiplying the volume of water by its density:

Mass = Volume x Density

Converting the volume from liters to cubic meters:

Volume = 7.2 liters = 0.0072 cubic meters

Now, we can calculate the mass of water:

Mass = 0.0072 cubic meters x 1000 kg/m^3 = 7.2 kg

Finally, we can calculate the number of moles of water:

Number of moles = 7.2 kg / 0.0018 kg/mol = 4000 moles

Therefore, there are 4000 moles of water in a container with a volume of 7.2 liters.