The empirical formula is the one already given* in the question, Cd(NO3)2 because it contains an atomic symbol, Cd, represented only one time. The name of the compound is cadmium (II) nitrate.
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*As well as possible, given the typography limitations of the question-asking format.
The standard name of this compound is Nitrogen(II) Oxide. It is generally known as nitric oxide.
The compound with the formula Ba(NO3)2 is called barium nitrate. It is a white crystalline solid often used in fireworks to produce a green flame.
The compound with the formula Al(NO3)3 is called aluminum nitrate.
Chromium (III) Nitrate
The compound formula for zinc nitrate is Zn(NO3)2.
The empirical formula for Co(NO3)2 is Co(NO3)2. The compound is named cobalt(II) nitrate.
The compound is lead(IV) nitrate, with the formula Pb(NO3)4.
Ca(NO3)2 is the chemical formula of calcium nitrate.
This chemical compound is copper nitrate.
The standard name of this compound is Nitrogen(II) Oxide. It is generally known as nitric oxide.
The compound with the formula Ba(NO3)2 is called barium nitrate. It is a white crystalline solid often used in fireworks to produce a green flame.
The compound with the formula Al(NO3)3 is called aluminum nitrate.
Chromium (III) Nitrate
The compound formula for zinc nitrate is Zn(NO3)2.
The compound name for mercury nitrate is mercurous nitrate or mercury(I) nitrate, with the chemical formula HgNO3.
The formula of a compound that contains Ag, N and O is Ag(NO3). The name of the compound is silver nitrate.
The term for the 4 in the formula 4Ca(NO3)2 is the coefficient. It indicates the number of units of the compound Ca(NO3)2 in the formula.