Balanced chemical equations
Heat and Temperature
Conservation of mass
Types of chemical reactions
Random
100
Is this equation balanced? (Yes or no)
2H2 + O2 → 2H2O
Yes
100
What tool is used to measure temperature?
Thermometer
100
Matter can not be __________ or ___________.
created or destroyed
100
Na+Cl --> NaCl
synthesis
100
What is the 2 called in this compound?
H2O
subscript
200
Which compounds are the products?
C3H8 + 5O2 → 3CO2 + 4H2O
3CO2 and 4H2O
200
In which state of matter do molecules move the SLOWEST?
solid
200
After a physical change, an object's mass stays the same. True or False?
True
200
2HgO→2Hg+O2
Decomposition
200
What is the symbol for silver?
Ag
300
What is the weight of the fire?
1 kg
300
Temperature can be measured in either ___________.
Celsius or Fahrenheit.
300
Who discovered the law of conservation of mass?
Lavoisier
300
Zn+2HCl→ZnCl2+H2
Single Replacement
300
Which compounds are the REACTANTS?
C3H8 + O2 → 3CO2 + 4H2O
C3H8 and O2
400
What is the arrow called in a chemical equation?
yield
400
Heat is measured in ___________.
Joules
400
Chemical reactions that absorb energy are ____________.
Endothermic
400
2KI+Pb(NO3)2→2KNO3+PbI2
Double Replacement
400
Balance this equation:
_H2 + N2 → _NH3
3H2 + N2 → 2NH3
500
Balance this equation:
C3H8 + 5O2 → 3CO2 + 4H2O
It is already balanced!
500
What is the temperature in CELSIUS?
15 degrees Celsius
500
Is the following equation balanced? How do you know?
Fe+S --> FeS
Yes, the equation has the same amount of each chemical on both sides
500
2NaOH→Na2O+H2O
Decomposition
500
Write an example of a chemical compound.
ex; H2O