The gram-molecular mass of H2O is 18.01. Therefore, 75.0 grams contains 75.0/18.01 = 4.16 moles. Each molecule contains two hydrogen atoms. Therefore, the number of hydrogen atoms = 2(4.16)(6.022 X 1023) = 5.01 X 1024 atoms.
Use this formula and you should be fine: n=m/M
n= number of moles
m= mass of the compound given
M= molar mass (in this case, add the mass of 2 H +O)
n(H20)= 75.0/18.02
4.16 moles
than to get the amount of water molecules in 75g
4.16 multiple by 6.02*10^23
=2.50*10^24 molecules
Water has a molar mass of 18.0153 grams per mole. 75 grams of the substance is then equal to 4.16 moles of water.
75.0 g H2O x 1 mole/17.99 g x 6.02x10^23 molecules/mole = 2.51x10^24 molecules
4.17 molecules
7.0 moles
:) welcome!
The answer is 4,166 moles.
2.51 x 10^24
200 miilion
4.17 mole
750
For a rock to have started with 1500 atoms of any element and now have 750 it has undergone radioactive decay equal to one full half life (i.e. there are half the number of atoms now than at the beginning).Uranium-235 has a half life of 7.038×108 years.As such, the rock is 7.038×108 or 703 million years old.
.0000787 mol
750 divided by 3 equals 250
A tonne of top soil is about 750 liters. Therefore 1600 liters is 2.13 tonnes
750 L hydrogen gas at 0 0C and 1 at is equal to 33,44 moles.
Both A53 and A106 are common for non corrosive services up to about 750 deg. A106 is killed steel (silicon content is present) , thus suitable for some services where Hydrogen present.
The formula of sulfuric acid is H2SO4, showing that each mole of sulfuric acid contains four mol of oxygen atoms. Therefore 750/4 or 187.5 mol of sulfuric acid will be sufficient.
750
750
750 cc of water
750 Milliliters is in one fifth of a bottle of vodka.
There are 750 milliliters in .75 liters.
750 pounds = 340.19 kilograms.
750 feet = 250 yards.
75 centimeters are in 750 centimeters.
750 miles is 47,520,000 inches.