Reactions

_P₄+_O₂ →  _P₂O₃

• 3 P₄+1 O₂ → 2 P₂O₃
• 1 P₄+1 O₂ → 2 P₂O₃
• 1 P₄+ 3 O₂ → 2 P₂O₃
• 1 P₄+ 2 O₂ → 3 P₂O₃

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

_BaS + _PtF₂ → _BaF₂ + _PtS

• 1 BaS + 1 PtF₂ → 1 BaF₂ + 1 PtS
• 4 BaS + 2 PtF₂ → 1 BaF₂ +  1 PtS
• 1 BaS + 2 PtF₂→ 2 BaF₂ +  2 PtS
• 1 BaS + 3 PtF₂ →1 BaF₂ +  2 PtS

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

_SO₂ + _Li₂Se →_SSe₂ + _Li₂O

• 1 SO₂ + 2 Li₂Se → 1 SSe₂ + 2 Li₂O
• 1 SO₂ + 1 Li₂Se → 2 SSe₂ + 2 Li₂O
• 2 SO₂ + 2 Li₂Se → 2 SSe₂ +  2 Li₂O
• 2 SO₂ + 2 Li₂Se → 1 SSe₂ + 1 Li₂O

Tags

NGSS.HS-PS1-7

_Al + _HCl →_H₂ + _AlCl₃

• 2 Al + 2 HCl → 2 H₂ + 6 AlCl₃
• 3 Al + 3 HCl → 6 H₂ + 2 AlCl₃
• 1 Al + 1 HCl → 3 H₂ + 1 AlCl₃
• 2 Al + 6 HCl → 3 H₂ + 2 AlCl₃

Tags

NGSS.HS-PS1-2

_K + _Cl₂ →_KCl

• 2 K + 16 Cl₂ → 8 KCl
• 2 K + 1 Cl₂ → 2 KCl
• 3 K + 4 Cl₂ → 3 KCl
• 1 K + 1 Cl₂ →1 KCl

_NaF + _Br₂ →_NaBr + _F₂

• 1NaF + 2 Br₂ →1 NaBr + 2 F₂
• 2NaF + 2 Br₂ → 2 NaBr + 2 F₂
• 2 NaF + 3 Br₂ → 1 NaBr + 2 F₂
• 2 NaF + 1 Br₂ → 2 NaBr + 1 F₂

Tags

NGSS.HS-PS1-7

Which of the following is true?

• Changing the subscripts to balance an equation is acceptable

• The products are listed on the left and the reactants are listed on the right

• Atoms are conserved when balancing a chemical equation

• Coefficients can be fractions

• Subscripts can be fractions

Tags

NGSS.HS-PS1-7

When compounds containing carbon and hydrogen react with oxygen in combustion reactions what is/are produced?

• CH4(g) and O2(g)

• H2(g) and O2(g)

• CO2(g) and H2O(g)

• C2H6(g)

• None of the above

What type of reaction is the following?

HgO (s) → Hg(l) + O₂(g)

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement

• Two of the above

What type of reaction is the following?

4Fe(s) + O2(g) → 2Fe2O3(s)

• Single Replacement

• Combustion

• Synthesis

• Decomposition

• Double Replacement