U3&4: Mole & Reactions

Molar Mass

100

What is the molar mass for: 

H₂O

18 g/mol

200

What is the molar mass for N₂O₅

108 g/mol

300

what is the molar mass for NaHCO₃

84 g/mol

400

what is the molar mass for Fe₂(SO₄)₃

400 g/mol

500

what is the molar mass for Ca₃(PO₄)₂

310 g/mol

mole-gram conversions

100

What is the relationship between 1 mole and molar mass? 

Same. 

1 mole = molar mass

200

When converting from grams to moles what will go on the top of the fraction in the set up?

1 mole

300

How many moles are in 20 grams NaCl?

0.34 moles

400

how many grams are in 2 moles C₄H₈

112 g

500

How many grams are in 4 moles CaCl₂

440 g

balancing

100

Only add ________ when balancing.

coefficients

200

what is the law of conservation of mass. 

mass/matter can not be created or destroyed

300

Balance: 

__Na + ___Cl₂ --> ___NaCl

2, 1, 2

400

Balance: 

__Br₂ + ___NaCl --> ___NaBr + __Cl₂

1, 2, 2, 1

500

Balance: 

____C₃H₈ + ___ O₂ --> ___CO₂ + ___H₂O

1, 5, 3, 4

types of reactions

100

What happens during a synthesis reaction?

put together

200

what happens during a decomposition?

break apart

300

What do you always need for a combustion?

What are the products?

Need O₂

products: H₂O and CO₂

400

Identify: 

Pb + CuNO₃ --> PbNO₃ + Cu

single replacement 

500

predict the products: 

CuSO₄ + Na₂CrO₄ -->

CuCrO₄ + Na₂SO₄ 

factors/indicators of chemical reaction

100

increased temperature will make a reaction go ______

faster

200

If a chemical is diluted (watered down) the reaction will go ______. 

slower

300

What will dissolve quicker and WHY? sugar grains or sugar cubes

grains because more surface area

400

What is an indication that a chemical reaction occurred? 

color, pH, gas formation, precipitate, energy

500

precipitates form during double replacement reactions. What is a precipitate?

solid formation