Some Basic Conc...

Who performed the gold foil experiment?

The weight ratio of roasted ore, coke and limestone fed into the blast furnace in the manufacture of cast iron is:

$$4.6\times 10^{22}$$ atoms of an element weight $$13.8$$ g. What is the atomic mass of the element?

A solution is prepared by adding $$2$$ g of substance $$A$$ to $$18$$ g of water. The mass percent of the solute is:

Statement 1: The number of gram molecules of oxygen in $$6.02 \times 10^{24}\ CO$$ molecules is 5.0.
Statement 2: The value of Avogadro number is $$6.02 \times 10^{23}$$

Assertion: 1 mole $$O_{3} (ozone)=N$$ molecule of $$O_{3} (ozone)=3N$$ atoms of $$O (oxygen)=48g$$

The mass of hydrogen at STP, that is present in a vessel which can hold $$4$$ grams of oxygen under similar conditions, is:

Choose the correct option for the following statement.

Which of the following is the best example to demonstrate the law of conservation of mass?

When 4 L of nitrogen completely reacts with hydrogen, what would be the volume of ammonia gas formed?