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Chemical Equations
Moles
Reaction Types
Reaction Rates
Energy
100

These are the products of the following reaction:

Na + H2O --> NaOH + H2

NaOH and H2

100

How many particles are in one mole?

6.02x1023

100

A + B --> AB

Synthesis

100

Define "reaction rate"

The speed it takes for a reaction to occur

100

The energy required to start a chemical reaction?

Activation Energy

200

According to the following equation, this substance is a liquid:

NaBr(s) + F2(g) --> NaF(s) + Br2(l)

Br2 or Bromine

200

what is the molar mass of silicon? Round to the nearest whole number

28 g/mol

200

CaCO3 --> CaO + CO2

Decomposition

200

What happens to reaction rate if the temperature increases?

it increases (speeds up)

200

What happens to energy when bonds are formed during a chemical reaction

It is released

300

According to the following equation, this substance is a precipitate:

NaCl(aq) + AgNO3(aq) --> AgCl(s) + NaNO3(aq)

AgCl

300

If you react 2 moles of lithium, how many moles of lithium oxide will be created?

4Li + O2 --> 2Li2O

1 mole

300

Two positive ions switch places and create two new ionic compounds

Double replacement

300

What does an inhibitor do?

Decreases reaction rate (makes it go slower)

300

This word describes a reaction which absorbs HEAT

endothermic

400

Write the skeleton equation for the following reaction:Magnesium reacts with oxygen and produces magnesium oxide

Mg + O2 --> MgO

400

What is the mass of 3 moles of phosphorus? Round your answer to the nearest whole number

93 g

400

Cl2 + LiBr --> Br2 + LiCl

Single replacement

400

You react oxygen and hydrogen gas at 1 atm of pressure. What will happen to the reaction rate if the pressure is increased to 1.5 atm?

Reaction rate will increase

400

The temperature of a reaction goes up. What word best described this reaction?

Exothermic (or exergonic)

500

Balance the following skeleton equation:

__Pb3(PO4)2 + __HF --> __PbF2 + __H3PO4

1, 6, 3, 2

500
How many moles are in 160 g of oxygen gas (O2)? Round your answer to the nearest whole number.

5 moles

500

Fe + O2 --> Fe2O3

Synthesis AND combustion

500

NaCl and Pb(NO3) react when they are dissolved in water. You obtain 3 g of each, and react them in 100 mL of water. What will happen to the time it takes for the reaction to finish if you repeat the experiment with only 50 mL of water?

The time it takes for the reaction to finish will decrease

500

Describe the difference between exergonic and exothermic reactions

Exergonic= energy is released

Exothermic=heat is released