Reactions

Balancing equations

100

If you have 4 oxygen atoms on the reactant side, how many must be on the product side?

4 oxygen atoms

200

What do you add in front of a compound to balance an equation?

What is a coefficient

300

What are the numbers at the bottom right of an element called?

 Subscript

400

Balance this equation: _H₂ + _O₂ → _H₂O

2H₂ + O₂ → 2H₂O

500

Balance the equation: 

_C₃H₈ + _O₂ → _CO₂ + _H₂O 

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

Endothermic and Exothermic

100

a reaction that absorbs energy

What is an Endothermic Reaction?

200

a reaction that releases energy

What is an Exothermic Reaction?

300

what the latin word "exo" means

What is outside?

400

A chemical reaction occurs, and the temperature of the surroundings decreases. What type of reaction is this?

What is Endothermic Reaction

500

What type of reaction is used in hand warmers? Exothermic or Endothermic

What is Exothermic?

Decomposition

100

Fe(2)O(2)

Fe + O(2)

200

Cl (2) + O(5)

Cl(2) + O(2)

300

H(2) + O(2)

O(2) + H(2)

400

2ZnO

O(2) + 2Zn

500

CaCO(3)

CaO + CO(2) g

Single Replacement

100

Cu(s) + 2AgNO(3) a/q

Cu(NO[3])2 a/q + 2Ag(s)

200

Zn(s) +HCl(g)

ZnCl a/q + H(2)g

300

2Br + 2BaI

I(2) + 2BaBr

400

Al + H(2) CO (2)

Al(CO3)(2) + H(2)

500

Zn + 2HNO(2)

Zn(NO3)(2) + H(2)

Double Replacement

100

AgNO(3) a/q + NaCl a/q

 AgCl (s) + NaNo(3) a/q

200

H(2)SO(4) + KOH

H(2)O + K(2)SO(2)a/q

300

Na(2)S a/q + HCl (a/q)

NaCl (a/q) + H(2)S a/q

400

2Na(OH) + CuCl(2)

2NaCl(2) + Cu(OH)2

500

NaCl + Pb(NO[3])(2)

PbCl + Na (NO[3])(2)