How many inches are there in 3.00 km? Given that 1 km = 1000 m, m = 1.094 yd, 1 yd = 36 in.


Correct option is


The unit conversation factors will be




Here, the conversion involves a number of steps. Hence, the unit conversion factors are applied in such a way that the unit of the preceding factor cancel out. Thus,







A man weight 175 1b. Express his weight in kg, Given that

1kg = 2.205 1b.


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.


Chlorine has two isotopes of atomic mass units 34.97 and 36.97. The relative abundances of these two isotopes are 0.755 and 0.245 respectively. Find the average atomic mass of chlorine.


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.


How many grams of NaOH should be dissolved to make 100 cm–3 of 0.15 M NaOH solution?