Some Basic Conc...

0.48 g of a sample of a compound containing boron and oxygen contains 0.192 g of boron and 0.288 g of oxygen. What will be the percentage composition of the compound?

A solution is prepared by adding $$5\ g$$ of a solute $$'X'$$ to $$45\ g$$ of solvent $$'Y'$$. What is the mass percent of solute $$'X'$$?

The weight of $$AgCl$$ precipitated when a solution containing $$5.85\ g$$ of $$NaCl$$ is added to a solution containing $$3.4\ g$$ of $$AgNO_3$$ is:

How much mass of sodium acetate is required to make 250 mL of 0.575 molar aqueous solution? 

A compound of magnesium contains  $$21.9\%$$ magnesium, $$27.8\%$$ phosphorus and $$50.3\%$$ oxygen. What will be the simplest formula of the compound?

What will be the weight of CO having the same number of oxygen atoms as present in 22 g of $$CO_2$$?

Which of the following statement about Avogadro's hypothesis is correct?

In a mixture of gases, the volume content of a gas is $$0.06\%$$ at STP. Calculate the number of molecules of the gas in 1 L of the mixture.

Total number of atoms present in 34 g of $$NH_3$$ is:

Major problems faced by energy section are