Chemistry
Correct the following statements.
(a) A molecular formula represents an element.
(b) Molecular formula of water is H2O2.
(c) A molecule of sulphur is monoatomic.
(d) CO and Co both represent cobalt.
(e) Formula of iron (III) oxide is FeO.
Chemical Formula
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Answer
(a) A molecular formula represents the molecule of an element or of a compound.
(b) Molecular formula of water is H2O.
(c) A molecule of sulphur is octatomic.
(d) CO represents Carbon Monoxide and Co represents cobalt.
(e) Formula of iron (III) oxide is Fe2O3.
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Related Questions
Complete the following table.
Acid Radicals →
Basic Radicals ↓Chloride Nitrate Sulphate Carbonate Hydroxide Phosphate Magnesium MgCl2 Mg(NO3)2 MgSO4 MgCO3 Mg(OH)2 Mg3(PO4)2 Sodium Zinc Silver Ammonium Calcium Iron (II) Potassium Name the following compounds and state how many atoms of each kind are present in one molecule of these compounds.
(a) H2SO4
(b) HClO4
(c) K2Cr2O7
(d) KMnO4
(e) K4[Fe(CN)6]
(f) Na2CrO4
(g) Mn3(BO4)2
(h) HNO2
Give the empirical formula of :
- Benzene (C6H6)
- Glucose (C6H12O6)
- Acetylene (C2H2)
- Acetic acid (CH3COOH)
What is the valency of :
(a) fluorine in CaF2
(b) sulphur in SF6
(c) phosphorus in PH3
(d) carbon in CH4
(e) Manganese in MnO2
(f) Copper in Cu2O
(g) Magnesium in Mg3N2
(h) nitrogen in the following compounds :
(i) N2O3 (ii) N2O5 (iii) NO2 (iv) NO