How many grams of NaOH should be dissolved to make 100 cm–3 of 0.15 M NaOH solution?
∴1000 cm3 of 0.15 M NaOH contain NaOH = 0.15 mole
∴ 100cm3 of 0.15 M NaOH contain NaOH
(Molar mass NaOH = 40 g mol–1)
How many inches are there in 3.00 km? Given that 1 km = 1000 m, m = 1.094 yd, 1 yd = 36 in.
What is the mass (in grams) of an aluminum block whose dimensions are.and whose density is 2.7 g/cm3? Given that 1 in. = 2.54 cm.
The mass of precious stones is expressed in terms of ‘carat’. Given that 1 caret = 3.168 grains and 1 grams = 15.4 grains, calculate the total mass of a ring in grams and kilograms which contains 0.500 carat diamond and 7.00 grams gold.
4.90 g of KClO3 when heated produced 1.92 g of oxygen and the residue (KCl) left behind weight 2.96 g. Show that these results illustrate the law of conservation of mass.
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Calculate the molecular mass of glucose (C6H12O6)molecule.
A solution is prepared by adding 2 g of a substance A to 18 g of water. Calculate the mass percent of the solute.
The density of 3 M solution of NaCl is 1.25 g mL–1. Calculate the molalityof the solution.
Calculate the number of oxalic acid molecules in 100mL of 0.02 N oxalic acid solution.
Calculate the molarity of water if its density is 100 kg/m3