Use of tables to derive the formulae of compounds 2 ( Form 2, Chemistry )

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Test your knowledge on radicals, valencies, and formula derivation.

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Use of tables to derive the formulae of compounds 2 ( Form 2, Chemistry )


Use of tables to derive the formulae of compounds 2 ( Form 2, Chemistry )Online version Test your knowledge on radicals, valencies, and formula derivation. by YAKILI LMS 1 Chlorine can have valency 2 in NaCl. Yes No 2 Calcium carbonate has the formula CaCO3. Yes No 3 The formula for nitric acid is HNO3-. Yes No 4 Phosphorus forms six bonds in phosphate. Yes No 5 Potassium nitrate has the formula KNO3. Yes No 6 Copper(II) oxide is CuO and contains Cu2+. Yes No 7 Nitrogen commonly forms three bonds in most compounds. Yes No 8 Ammonium ion has the formula NH4+. Yes No 9 Hydrogen has valency 1. Yes No 10 Hydroxide ion is HO2-. Yes No 11 Calcium oxide has the formula CaO2. Yes No 12 In Na2SO4, sulfate is attached to two sodium ions, forming Na2SO4. Yes No 13 The carbonate ion carries a 2- charge: CO3 2-. Yes No 14 The hydroxide ion has the formula OH-. Yes No 15 The nitrate ion has the formula NO3-. Yes No 16 The valency of sodium is 1. Yes No 17 In NaCl, Na has valency 1 and Cl has valency 1. Yes No 18 In a compound, the sum of valencies must balance to zero. Yes No 19 When writing formulas, subscripts are chosen so total positive equals total negative charges. Yes No 20 The formula of ammonium sulfate is (NH4)2SO4. Yes No 21 The formula for potassium carbonate is K2CO3. Yes No 22 Magnesium oxide is MgO2. Yes No 23 Hydrogen can form two bonds when bonded to oxygen in water. Yes No 24 Carbon has valency 3 in most compounds. Yes No 25 Carbon dioxide has the formula CO2 and carbon forms bonds to oxygen. Yes No 26 The valency of sulfate is 2- when forming salts with metal cations. Yes No 27 In FeO there are Fe3+ ions. Yes No 28 The oxidation state of hydrogen is +1 in most compounds. Yes No 29 The nitrate ion is NO2-. Yes No 30 The oxidation state of oxygen is -2 in most compounds. Yes No 31 Sodium chloride is NaCl2. Yes No 32 The ion nitrate is NO-. Yes No 33 The valency of magnesium is 2. Yes No 34 The carbonate ion is CO3 3-. Yes No 35 The formula for aluminium sulfate is Al2(SO4)3. Yes No 36 In Fe3O4 there are both Fe2+ and Fe3+ ions. Yes No 37 Oxygen has valency +2 in all compounds. Yes No 38 The sulfate ion carries a 2- charge: SO4 2-. Yes No 39 Oxygen typically has valency 2. Yes No 40 Carbon commonly has valency 4. Yes No 41 Chlorine commonly has valency 1. Yes No 42 The formula for sulfuric acid is HSO4-. Yes No 43 The oxide of calcium is CaO2. Yes No 44 Phosphorus in phosphate (PO4)3- has valency 3. Yes No 45 The formula for ammonium sulfate is (NH4)SO4. Yes No 46 Al2(SO4)3 is magnesium sulfate. Yes No 47 Water is H2O2. Yes No 48 The table of common valencies helps derive simple formulas. Yes No 49 Noble gases commonly form multiple covalent bonds to reach octet in most compounds. Yes No 50 In calculating formulas of compounds, tables can help deduce the simplest whole-number ratios. Yes No

Use of tables to derive the formulae of compounds 2 ( Form 2, Chemistry )

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Use of tables to derive the formulae of compounds 2 ( Form 2, Chemistry )Online version

by YAKILI LMS

Chlorine can have valency 2 in NaCl.

Calcium carbonate has the formula CaCO3.

The formula for nitric acid is HNO3-.

Phosphorus forms six bonds in phosphate.

Potassium nitrate has the formula KNO3.

Copper(II) oxide is CuO and contains Cu2+.

Nitrogen commonly forms three bonds in most compounds.

Ammonium ion has the formula NH4+.

Hydrogen has valency 1.

Hydroxide ion is HO2-.

Calcium oxide has the formula CaO2.

In Na2SO4, sulfate is attached to two sodium ions, forming Na2SO4.

The carbonate ion carries a 2- charge: CO3 2-.

The hydroxide ion has the formula OH-.

The nitrate ion has the formula NO3-.

The valency of sodium is 1.

In NaCl, Na has valency 1 and Cl has valency 1.

In a compound, the sum of valencies must balance to zero.

When writing formulas, subscripts are chosen so total positive equals total negative charges.

The formula of ammonium sulfate is (NH4)2SO4.

The formula for potassium carbonate is K2CO3.

Magnesium oxide is MgO2.

Hydrogen can form two bonds when bonded to oxygen in water.

Carbon has valency 3 in most compounds.

Carbon dioxide has the formula CO2 and carbon forms bonds to oxygen.

The valency of sulfate is 2- when forming salts with metal cations.

In FeO there are Fe3+ ions.

The oxidation state of hydrogen is +1 in most compounds.

The nitrate ion is NO2-.

The oxidation state of oxygen is -2 in most compounds.

Sodium chloride is NaCl2.

The ion nitrate is NO-.

The valency of magnesium is 2.

The carbonate ion is CO3 3-.

The formula for aluminium sulfate is Al2(SO4)3.

In Fe3O4 there are both Fe2+ and Fe3+ ions.

Oxygen has valency +2 in all compounds.

The sulfate ion carries a 2- charge: SO4 2-.

Oxygen typically has valency 2.

Carbon commonly has valency 4.

Chlorine commonly has valency 1.

The formula for sulfuric acid is HSO4-.

The oxide of calcium is CaO2.

Phosphorus in phosphate (PO4)3- has valency 3.

The formula for ammonium sulfate is (NH4)SO4.

Al2(SO4)3 is magnesium sulfate.

Water is H2O2.

The table of common valencies helps derive simple formulas.

Noble gases commonly form multiple covalent bonds to reach octet in most compounds.

In calculating formulas of compounds, tables can help deduce the simplest whole-number ratios.