What is 500ml in grams?

Answer 1

There is no equivalence.

A gram is a measure of mass. A millilitre is a measure of volume. The two measure different things and, according to basic principles of dimensional analysis, conversion from one to the other is not valid.

If you are not convinced, consider a millilitre of air. How many grams? Next consider a millilitre of molten lead. How many grams?

The masses of equal volumes of the two substances will clearly be very different. So there is no direct conversion between mass and volume: you need to know the density of the substance to enable you to carry out the conversion.

Some people still believe that there is a conversion in relation to pure water but that is only approximately true. Until 1964 (nearly 50 year ago!) a litre was defined as the volume of one kilogram of pure water at 4 degrees Celsius and at a pressure of 760 millimetres of Mercury. With that definition a conversion would have been valid - but only for pure water and only under those conditions. In any case that definition of a litre was abandoned in favour of 1 litre =1000 cubic centimetres.

In fact the density of pure water, at 4 deg C and 760 ml of mercury is 999.9720 grams/millilitre

Answer 2

The conversion of milliliters to grams depends on the density of the substance. For water, 500ml is equal to 500 grams, as the density of water is 1g/ml. For other substances, you would need to know the density to make the conversion.

Answer 3

This question cannot be answered sensibly. A millilitre is a measure of volume, with dimensions [L3]. A milligram is a measure of mass, with dimensions [M]. Basic dimensional analysis teaches that you cannot convert between measures with different dimensions such as these without additional information.

A simple mental exercise will demonstrate that a milligram of air and a milligram of water will have very different volumes.

Answer 4

Depends on the density of the material you are measuring. If it is water, density 1, 50millilitres is equivalent to 50 grams If it was Mercury, density 13.7, weight would be 50 X 13.7 = 685g

Answer 5

This cannot be sensibly answered. Milliliters (mL or ml) and liters (L) are measures of volume. Grams (g), kilograms (kg) and milligrams (mg) are measures of weight or mass.