However, a ferromagnetic material will still lose its magnetism if you heat it above a certain point, known as its Curie temperature. Iron has a Curie temperature of 770Â°C (1300Â°F), while for nickel the Curie temperature is ~355Â°C (~670Â°F). If you heat an iron magnet to 800Â°C (~1500Â°F), it stops being a magnet.
Water (H2O) is made from 2 atoms of hydrogen and 1 atom of oxygen. A mole of water molecules would be 2 moles of hydrogen atoms plus 1 mole of oxygen atoms. From the periodic table we see the atomic weight of hydrogen is 1.0079 and the atomic weight of oxygen is 15.9994. Atomic mass is the number of grams per mole of the element. This means 1 mole of hydrogen weighs 1.0079 grams and 1 mole of oxygen weighs 15.9994 grams. Water would weigh. weight of water = 2(1.0079) g + 15.9994 g. weight of water = 2.0158 g + 15.9994 g. weight of water = 18.0152 g.
Now, the weight of a particular volume of any substance is determined by a factor called Density. The density of any substance is the mass (in kg) of the substance posessed by unit volume( 1 cubic meter) of the substance. The Density of Water is approximately 1000Kg/m3. one Litre= 1/1000 m3. Hence converted in litre, density of water becomes 1 Kg/Litre. hence mass of 1 L of water is 1 kg.