A certain public water supply contains `0.10ppb` (part per billion) of chloroform `(CHCI_3)`. How many molecules of `CHCI_3` would be obtained in `0.478 mL` drop of this water ?(assumed `d=1g/mL`)

A certain public water supply contains 0.10ppb (part per billion) of chloroform (CHCl_(3)) . How many molecules of CHCl_(3) would be obtained in 0.478mL drop of this water? (Assuming d=1g//Ml)

How many moles of water molecules are present in 3.8 x 10^(-8) g of water?

If the water molecules in 1.0 g of water were distributed uniformly over the surface of earth, how many such molecules would there be in 1.0 cm^2 of earth's surface ?

The volume of a drop of water is 0.04 mL . How many H_(2) O molecules are there in a drop of a water? d = 1.0 g mL .

6.3 g of oxalic acid dihydrate have been dissolved in water to obtain a 250 ml solution. How much volume of 0.1 N NaOH would be required to neutralize 10 mL of this solution ?

In photosynthesis, 6 molecules of carbon combine with an equal number of water molecules through a complex series of reactions to give a molecule of glucose having a molecular formula C_(6)H_(12)O_(6) . How many grams of water would be requried to produce 18g of glucose? Compute the volume of water so consumed assuming the density of water to be 1g cm^(-3) .

0.7875 g of crystalline barium hydroxide is dissolved in water .For the neutralization of this solution 20 mL of N/4 HNO_(3) is required. How many moles of water of crystallization are present in one mole of this base ? (Given : Atomic mass Ba=137,O=16, N=14, H=1)

How much grams of CH_(3)OH should be dissolved in water for preparing 150 ml of 2.0 M CH_(3)OH solution ?

Oridinary water contain one part of heavy water per 6000 parts of water by weight. The number of heavy water molecules present in a drop of water of volume 0.01 mL is (density of water 1 g/mL)

Solution of 100 ml water contains 0.73 g of Mg(HCO_(3))_(2) and 0.81g of Ca(HCO_(3))_(2) calculate the hardness in terms of ppm of CaCO_(3)