1000 liter methanol = 1000 kg
1 liter metahnol = 1 kg
1 ml metahnol = 1 gram
10 ml metahanol = 10 grames
The mass of 10 mL of water is 10 g.
With 25ml methanol and 75ml water, there is 100ml in total. So there is 25/100 = 25% by volume methanol.
13.6% methanol solution.
The mass of a spoon is 10.
Density = mass/milliliters Density = 10 grams/2 ml = 5 g/ml ---------------
The number of milliliters to have a mass of 238 g depends upon the mass density of the substance. For pure water at 4.0 C : ----------------------------------- d = 1.000 g per mL d = m / V ..... [ By Definition of mass density ] V = m / d = ( 238 g ) / ( 1.000 g /mL ) = 238 mL <------- For methanol at 10 C : --------------------------- d = 0.801 g / mL V = m / d = ( 238 g ) / ( 0.801 g / mL ) = 297 mL <-----------
25%
0.5gm/ml
D= G/mL, so 44/10
You divide the mass of a substance by its density.
Methanol, CH4O, has a molar mass of 32g (12g+4.0g+16g)* *note this is only rounded to two sig figs, since the mass of elements are usually rounded to the tenths place. Next, simply use dimensional analysis: 1ml/22.4L X 32g. you should get the right answer by doing the steps shown above.
ml is a measure of volume; mg is a measure of mass. The mass of each ml depends on the density of the substance you are dealing with.