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shish
Questions (16)
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
3 answers
748 views
the weight of one atom of uranium is 238 amu. its actual wt. is ......g
6 answers
1,717 views
how much time(in years) would it take to distribute one avogadro number of wheat grains if 10^10 grains are distributed each
2 answers
657 views
the density of liquid mercury is 13.6 g/cm^3. how many moles of mercury are there in 1 litre of the metal?
1 answer
1,133 views
average atomic mass of magnesium is 24.31 amu. this magnesium is composed of 79 mole % of ^24 Mg and remaining 21mole % of ^25
6 answers
4,552 views
calculate the number of malecules in a drop of water weighting 0.09 g
1 answer
948 views
calculate the no. of molecules in 16g of methane is:
3 answers
665 views
a sample of ethane has the same mass as 10million mulecules of methane. how many moles of CO2 are left?
1 answer
885 views
the no. of neutrons in 5g of D2O(Dis 2/1 H) are:
4 answers
1,075 views
calculate the wt. of 6.022x 10^23 formula units of CaCO3
1 answer
605 views
from 200 mg of CO2, 10^21 molecules are removed. how many moles of CO2 are left?
1 answer
722 views
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
4 answers
595 views
if from 3moles MgSO4.7H2O all the 'o' atoms are taken out and converted into ozone, find the number of O3 molecules formed.
1 answer
496 views
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?
3 answers
1,292 views
the no. of real roots of eqn (x-1)POWER 2 + (X-2) POWER 2 +(X-3) POWER 2= 0 IS:
1 answer
798 views
Write half page for each topic.
What do you feel about? or something you wish to know or learned ? in college about? 1. Test
1 answer
1,533 views
