shish

the no. of real roots of eqn (x-1)POWER 2 + (X-2) POWER 2 +(X-3) POWER 2= 0 IS:

11 years ago

if the components of air are N2-78% ;O2-21%; Ar-0.9% and Co2-0.1% by volume (or mole) what would be the molecular weight of air?

11 years ago

if from 3moles MgSO4.7H2O all the 'o' atoms are taken out and converted into ozone, find the number of O3 molecules formed.

11 years ago

if from 10 moles NH3 and 5moles of H2SO4 all the H-atoms are removed in order to from H2 gas, then find the no. of H2 molecules formed.

11 years ago

from 200 mg of CO2, 10^21 molecules are removed. how many moles of CO2 are left?

11 years ago

calculate the wt. of 6.022x 10^23 formula units of CaCO3

11 years ago

the no. of neutrons in 5g of D2O(Dis 2/1 H) are:

11 years ago

a sample of ethane has the same mass as 10million mulecules of methane. how many moles of CO2 are left?

11 years ago

calculate the no. of molecules in 16g of methane is:

11 years ago

calculate the number of malecules in a drop of water weighting 0.09 g

11 years ago

average atomic mass of magnesium is 24.31 amu. this magnesium is composed of 79 mole % of ^24 Mg and remaining 21mole % of ^25 Mg. calculate mole % of ^26Mg.

11 years ago

the density of liquid mercury is 13.6 g/cm^3. how many moles of mercury are there in 1 litre of the metal?

11 years ago

how much time(in years) would it take to distribute one avogadro number of wheat grains if 10^10 grains are distributed each second?

11 years ago

the weight of one atom of uranium is 238 amu. its actual wt. is ......g

11 years ago

find (i) the total no. of neutrons and (ii) the total mass of neutrons in 7mg o^14C. (assume that the mass of a neutron = mass of a hydrogen atom)

11 years ago