Writing and Balancing Chemical Equations

Which is the correct formula for the compound formed between beryllium and nitrogen?

• BeN
• Be₃N
• Be₃N₂
• Be₂N₃

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

Which is NOT a diatomic molecule?

• Fluorine
• Nitrogen
• Boron
• Bromine

Tags

NGSS.MS-PS1-1

Which type of chemical reaction is shown?

• double replacement
• composition
• combustion
• decomposition

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which type of reaction can be recognized by the general pattern?

• combustion
• single replacement
• composition
• decomposition

Tags

NGSS.MS-PS1-2

Identify the type of reaction shown by this chemical equation:
Al  +  HCl  →  AlCl₃  +  H₂

• single replacement
• composition
• double replacement
• decomposition

Which is the correctly balanced equaition?

• Cl₂ + 2NaI → 2NaCl + I₂

• Cl₂ + 2NaI → NaCl + 2I₂

• Cl₂ + NaI → NaCl + I₂

• 2Cl₂ + NaI → 2NaCl + I₂

Tags

NGSS.HS-PS1-7

The correct coefficients for the equation are

• A. 2, 2, 3

• B. 3, 2, 2

• C. 2, 3, 2

• D. 2, 1, 3

Tags

NGSS.HS-PS1-7

In a chemical reaction, the mass of the products is _____

• A. less than the mass of the reactants.

• B. greater than the mass of the reactants.

• C. equal to the mass of the reactants.

• D. undetermined

Tags

NGSS.HS-PS1-7

Write the equation for the following:

nickel (III) hydroxide reacts with copper to form nickel and copper (II) hydroxide

• Ni(OH) + Cu → Ni + Cu(OH)

• NiOH₃ + Cu → Ni + CuOH₂

• Ni(OH)₃ + Cu → Ni + Cu(OH)₂

• Ni(OH)₃ + Cu²⁺ → Ni³⁺ + Cu(OH)₂

Tags

NGSS.HS-PS1-7

NGSS.HS-PS1-2

Write the equation for the following:

calcium reacts with oxygen to form calcium oxide

• Ca + O → CaO

• Ca + O₂ → CaO

• Ca²⁺ + O₂ → CaO

• Ca²⁺ + O → CaO

Tags

NGSS.HS-PS1-7

NGSS.HS-PS1-2