Reaction - balance and types

Which of these state symbols is NOT correctly matched to its meaning?

• (g) = grams

• (l) = liquid

• (s) = precipitate

• (aq) = soution

What do we call the numbers we use to balance reactions?

• subscripts

• coefficients

• congruents

• superscripts

How many hydrogens are in   3 (NH₄)₂CrO₄?

• 4
• 2
• 8
• 24

What type of reaction is this?
 Cl₂ + 2KI →  I₂ + 2KCl

• synthesis
• single displacement
• double displacement
• decomposition

What coefficients are needed to balance... __P₄ + __O₂ →__P₂O₃

• 1,3,2
• 1,1,1
• 1,2,3
• 2,1,2

What coefficients are needed to balance... __AgNO₃ + __Cu  → __Cu(NO₃)₂ + __Ag

• 4,2,1,2
• 1,1,1,1
• 1,2,1,2
• 2,1,1,2

Tags

NGSS.HS-PS1-7

What coefficients are needed to balance... __CH₄ + __O₂ → __CO₂ + __H₂O

• 2,1,2,1
• 1,2,1,2
• 1,1,1,1
• 1,3,1,3

Tags

NGSS.HS-PS1-7

What law says that the mass of the reactants should equal the mass of the products in a chemical equation?

• Law of Constant Mass
• Law of Conservation of Mass
• Law of Preservation of Mass
• Law of Balance of Mass

Tags

NGSS.HS-PS1-7

What type of reaction is this?
2 Na₃PO₄ + 3 CaCl₂ → Ca₃(PO₄)₂ + 6 NaCl

• single displacement
• double displacement
• synthesis
• decomposition

What type of reaction is this?
2Pb(NO₃)₂ → 2PbO + 4NO₂ + O₂

• synthesis 
• decomposition
• single displacement
• combustion