paper-1a – Page 4

M25-CHEM-HL-TZ3-P1A-Q9

What is the formal charge of the nitrogen atom in \( NO_3^- \)?

What is the hybridization of carbon and oxygen in \( CO_3^{2-} \)?

What is the formula of the compound formed by aluminium ions and sulfate(VI) ions?

A substance has the following properties: Melting point: \( 714^{\circ}C \) Electrical conductivity: poor when solid, good when molten What

Which forces of attraction cause the boiling point of ammonia, \( NH_3 \), to be significantly higher than that of

What is the relative atomic mass of an element with a mass spectrum showing a peak at \( m/z =

What is the maximum number of electrons that can occupy the fourth main energy level of an atom?

How many oxygen atoms are present in \( 0.0200 \, mol \) of \( CuSO_4 \cdot 5H_2O \)?

What is a possible empirical formula for a substance with \( M_r = 58 \)? I. \( C_2H_5 \) II.

Which volume of butane gas, in \( cm^3 \), will produce \( 40 \, cm^3 \) of carbon dioxide gas