Chemistry equations
Moles
Stoichiometry
Thermochemistry
Intermolecular forces
100

True or False; usually products are the substances that are written on the right side of the chemical equation while the reactants are found on the left side  

False

100

What are moles used for?

To measure the amount of atoms or molecules in a substance. 

100

What is stoichiometry? 

The study of how the quantities of reactants and products are related in a chemical reaction

100

What is the formula for calculating heat?


q = mcΔT

100

Intermolecular forces are forces ______ molecules 

Between 

200

You can tell a new substances form when all, but of one of the below happpens:

A) bubbles appear 

B) light is emitted from a flame 

C) solid dry ice turns into gas

C) solid dry ice turns into gas

200

Whatis Avogadros number? 


6.02 x 10 (23)

200

The first step in stoichiometry is to…..?

Determine a balanced equation 

200

What are the two different types of energy and their differences between eachother?

endothermic reactions absorbs heat while exothermic reactions  releases heat 

200

True or false; Hydrogen bonds have the strongest intermolecular force of attraction.  

True 

300

Is this equation balanced?

2Hg + O2 —> 2HgO

Yes

300

TRUE OR FALSE; If 2 compounds have the same empirical formula, they are the same (same properties, structure, etc.)

False 

300

Balance:  ____ RbNO3 + ____ BeF2 ----> ____ Be(NO3)2 + ____ RbF

 _2_ RbNO3 + __1_ BeF2 ----> _1_ Be(NO3)2 + _2_ RbF

300

Is the reactions endo or exothermic ?

2 H2O + energy --> 2H2 + O2

endothermic because its absorbing energy

300

What type of intermolecular force does NH3 have 

Hydrogen bonding 

400

Define a single displacement reaction and a double displacement reaction and describe one the similarities and one differences between the two. 

Similarity: They both involve the rearrangement of atoms or ions to form new compounds and are both seen as chemical reactions. 

In a single displacement reaction, one element or ion displaces another element and a compound, leading to the formation of a new compound and a free element. A double displacement, the positive ions and the negative ions from two compound switch places, resulting in the formation of two new compounds.


400

How many molecules are in 2.00 moles of H2O?

1.20 x 10(24) molecules H2O

400

What is the mole ratio between nitrogen and ammonia in N2 + 3H2 -> 2NH3?

2 moles NH3/ 1 moles N2

400

What is 42 kJ converted into joules 

42000 J

400

If fluorine is stronger then carbon, what charge will the fluorine receive?

Slight negative 

500


Which of the following equations is balanced?
1) 2H2 + O2 ---> H2O
2) H2 + 2O2 ---> 2H2O
3) H2 + O2 ---> H2O
4) 2H2 + O2 ---> 2H2O


4) 2H2 + O2 ---> 2H2O
500

Find the percent composition of N2S2

N:30.4 % S:69.6 %

500

What is the molar mass of Zn(C2H3O2)2?

183.5 g/mol

500

A 500g piece of aluminum has a temperature of 7°C and with a specific heat of 0.900 J/gºC. What is the heat produced? 

q = mcΔT


3150 J

500


Which substance would have the weakest intermolecular forces of attraction?

A) CH4

B) NaCl

C) H2O

D) MgF2


A) CH4