Free Printable Chemical Formulae And Equation

Worksheets

Chemical Formulae And Equation

Total questions: 21

Worksheet time: 52mins

Name

Class

Date

The smallest unit of matter which can exist independently is called

an atom

a molecule

a compound

an element

Fill in the blank space to balance the chemical equation.

2KI + ____Cl₂→ 2KCl + I₂

When balancing this equation, Fe + Cl₂ → FeCl₃, what is the correct coefficient for Cl₂?

Given the formulae for calcium ion is Ca²⁺ and carbonate ion is CO₃^2-. Choose the correct chemical formula of calcium carbonate.

Diberi formula ion kalsium ialah Ca²⁺ dan ion karbonat ialah CO₃^2-. Pilih formula kimia yang betul bagi kalsium karbonat.

Ca(CO₃)₂

CaCO₃

Ca₂CO₃

Ca₃(CO₃)₂

Which of the following chemical formulae is correct?

Antara formula kimia berikut, yang manakah betul?

Li₂O

KBr₂

Al₃Cl

MgNO₃

Which of the following is a compound?

O₂

CO₂

Ag(NO₃)₂ + HCl --> HNO₃ + AgCl₂
What are the reactants in the above reaction?

Ag(NO₃)₂ + HCl

HNO₃ + AgCl₂

HCl + HNO₃

Ag(NO₃)₂ + AgCl₂

Zinc reacts with Oxygen to form Zinc Oxide. The properties of Zinc Oxide are most likely -

similar to both Zinc and Oxygen

similar only to Zinc

similar only to Oxygen

different from Zinc or Oxygen

What is the correct way to write the formula for the model of this compound?

2H₂0

2H₂O

2HO₂

H₂O₂

10.

What state of matter is this substance?

solid

liquid

gas

aqueous

11.

Magnesium can be burned in air to produce solid magnesium oxide.

2Mg(s) + O₂(g)→ 2MgO(s)

Mg(s) + O(g) → MgO(s)

2Mg(s) + CO₂(g)→ 2MgO(s) + C(s)

2Mg(s) + O₂(g)→ Mg₂O₂(s)

12.

Sodium reacts with chlorine to produce sodium chloride.

NaCl(s) → Cl(g) + Na(s)

Na(s) + CO₂(g) → NaCO₂(s)

2Na(s) + Cl₂(g) → 2NaCl(s)

Na(s) + Cl(g) → NaCl

13.

What is the right part of a chemical equation called...
2H_{2 +}O₂ --> 2H₂O

Reactants

Products

Yields

Chemical Equation

14.

What is the correct formula for Ammonium phosphate?

NH₄PO₄

NH₄₃PO₄

(NH₄)₃PO₄

NH₄(PO₄)₃

15.

What is the name of the compound P₃O₅?

Triphosphorus pentaoxide

Phosphorus pentaoxide

Triphosphorus oxide

Phosphorus oxide

16.

What is the name of the compound NH₄OH?

Nitrogen oxygen hydride

Nitrogen hydroxide

Ammonium oxygen hydride

Ammonium hydroxide

17.

What is the correct formula of the potassium oxide?

K₂O

KO₂

K₂O₂

18.

Calculate the number of atoms in 0.0340 g Zn.

[RAM: Zn = 65. Avogadro Constant, N_A = 6.02 x 10²³ mol^-1]

5.200 x 10^-4 of atoms Zn

3.130 x 10²³ of atoms Zn

3.150 x 10²⁰ of atoms Zn

1 atom of Zn

19.

2 NaClO₃ (s) --> 2NaCl (s) + 3O₂ (g)

12.00 moles of NaClO₃ will produce how many grams of O₂?

[RAM: O = 16, Na = 23, Cl = 35.5]

256 g O₂

576 g O₂

288 g O₂

345 g O₂

20.

The salt zinc chloride can be made by dissolving zinc carbonate in dilute hydrochloric acid.

ZnCO_3(s) + 2HCl_(aq) ==> ZnCl_2(aq) + H₂O_(l) + CO_2(g)

Given the atomic masses: Zn = 65, C = 12, O =16, H = 1, Cl =35.5, what mass of zinc chloride in g can be made from 25 g of zinc carbonate?

27.2

13.6

12.5

54.4

21.

For the reaction represented by the equation Cl₂ + 2KBr → Br₂ + 2KCl, how many grams of potassium chloride (KCl) can be produced from 356 grams potassium bromide (KBr)? Round to one decimal point when calculating.

[RAM: Cl = 35.5, K = 39, Br = 80]

749 g

224 g

479 g

814 g

100 %

Chemical Formulae And Equation

Total questions: 21

Worksheet time: 52mins

Similar Resources on Wayground