Which of the following has the least mass A) one gram atom of magnesium B)0.9 mole of nitric oxide C)22.4 ;litres of `N_(2)` at STP D) 6.02X`10^(24)` molecules of `O_(2)`

Which of the following weighs most (a) 2 gram-atom of oxygen (b) 25 g of Fe (c) 4 xx 10^(23) atoms of carbon (d) 22.4 litres of CO_(2)

Which of the following contains the largest mass of hydrogen atoms (a) 5.0 moles of C_(2)H_(2)O_(4) (b) 1.1 moles of C_(3)H_(8)O_(3) (c) 1.5 moles of C_(6)H_(8)O_(6) (d) 4.0 moles of C_(2)H_(4)O_(2)

What is the mass of: (a) 0.2 mole of oxygen atoms? (b) 0.5 mole of water molecules?

Which of the following does have minimum mass in grams ? (i) 1 gram atom of oxygen (ii) 4.2 gram molecules of H_2 (iii) 2 gram molecules of helium (iv) 1.6 gram atoms of chlorine

What is the mass in grams of one molecule of caffeine ( C_8H_10N_4O_2 ) ?

Rearrange the following (I to IV) in the order of increasing masses : (I) 0.5 mole of O_(3)" "(II) 0.5 gm atom of oxygen (III) 3.011 xx 10^(23) molecules of O_(2) " " (IV) 5.6 litre of CO_(2) at STP

Calculate the mass of the following: (i) 0.5 mole of N_(2) gas (mass from mole of molecule) (ii) 0.5 mole of N atoms (mass from mole of atom) (iii) 3.011 × 10_(23) number of N atoms (mass from number) (iv) 6.022 × 10_(23) number of N_(2) molecules (mass from number)

The Ne atom has 10 times the mass of H_(2) molecule. Which of the following statements is true? I. At 25^(@)C both of them have the same kinetic energy. II. Ten moles of H_(2) would have the same volume as 1 mole of Ne at same temp. and pressure. III. One mole of Ne exerts the same pressure as one mole of H_(2) at STP. IV. A H_(2) molecule travels 10 times faster than Ne atom at same temperature. V. At STP, one litre of Ne has 10 times the density of 1 litre of H_(2).

Find the volume of the following at STP . a. 14 g of mitrogen b. 6.023 xx 10^(22) molecules of NH_(3) c. 0.1 "mole of " SO_(2) .

A mole of any substance contains 6.023 xx 10^(23) particles. The particles may be atom, molecule ions, electron, proton or neutron. One mole of atom is equal to 1 gm -atom which is equal to atomic weight of atom. 1 gm molecule of any gas is 1 mole of gas whose volume is 22.4 litre at N.T.P. Mass of 1 atom of an element X_(2) is 6.64 xx 10^(-23)gm . Molecular weight of X_(2) is