u2/cm/g3
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I have no idea about the above answer, but it does not appear to answer the question.
The best way to find the mass of a given quantity of water is to use a balance to find the mass of an empty container. Then pour the water into the container and measure their combined mass. The difference between the two is the mass of the water.
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The mass of water can be calculated by multiplying its volume by its density. The density of water is approximately 1 gram per cubic centimeter at standard temperature and pressure. So, for example, a volume of 1 liter of water would have a mass of 1000 grams or 1 kilogram.
Probably just one of the ways is to calculate the mass of an empty container.
Then, pour the water into the container and calculate the mass.
Then, subtract the empty container's mass from the mass when you put the water in.
There you have it. The mass of the water. TADA!
Multiply the volume of the water by its density. Water has a density of 1 kg per liter.
So, obviously, you cannot simply pour water onto a balance and weigh it. You'll need something to hold it in. Try a beaker.
Lets say that you want to find the mass of 100mL of water. Firstly, you'll need to weigh an empty beaker on a balance and record the mass. Next, pour 100mL of water into the beaker and weigh it again. Record the mass of beaker containing water.
So now you have the mass of the beaker and the mass of the beaker + water. You want to find the mass of just the water. Subtract the mass of the beaker from the mass of the beaker with water, and there you have it.
Example if you have 10.0ML of water then
The definition of a Kilogram (Kg) is 1 litre of pure water at room temperature.
Each cubic centimetre or millilitre (ml meaning 1000th of a litre) is therefore 1 gram.
The answer you need is 10 grams
Water has a density of 1 kilogram per liter. As such, it's quite simple to calculate the mass of water using the volume, translating liters directly to kilograms.
Water molecules are composed from hydrogen and oxygen. Their atomic masses are 1 and 16 respectively. The molecular mass of water is 2x1+16=18u.
The mass of water, as opposed to its density, depends on the quantity of water whose mass is being calculated.
To find water by mass in a compound, you can calculate the difference in mass before and after heating the compound to drive off the water. The lost mass represents the mass of water present in the compound. You can then calculate the percentage of water in the compound by dividing the mass of water by the total mass of the compound and multiplying by 100.
To calculate the moles of water, you can use the formula: moles = mass of water (in grams) / molar mass of water (about 18.015 g/mol). Simply divide the mass of water by its molar mass to find the number of moles.
To calculate the molality of a solution, you need to divide the moles of the solute (in this case, NaCl) by the mass of the solvent (water) in kilograms. First, convert the mass of NaCl to moles using its molar mass. Then, calculate the molality by dividing the moles of NaCl by the mass of water in kilograms.
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The mass of the water would be 40g - 2g = 38g. The mass of the salt would be 2g.