Show:
Law of Conservation of mass
Balanacing
Types of Chemical Reactions
Chemical reactions & Factors affecting the rate
Misc
100
What is the Law of Conservation of mass?
During a chemical reaction, the matter is not created or destroyed
100
What is a Coefficient?
Is the big number that is written in front of the chemical formula.
100
What is Synthesis reaction?
when two or more elements or compounds combine to make a more complex substance.
100
The energy needed to start a chemical reaction is............
Activation energy
100

Crushing a reactant ____________ the reaction rate

increases

200

According to the law of conservation of mass mass of reactants equal the mass of the products. True or False?

True

200

In balancing chemical reactions we never change the:

 Subscript

200
AB = A+B is what type of reaction?
Decomposition reaction
200
If we used a catalyst what will happen to the rate of the reaction?
The rate will increase
200
Cooling down a reaction _____________ the reaction rate

decreases

300
If we have 10 grams of reactants how many grams of products we should have?
10 grams (reactants=products)
300
how many of each element in the formula? 2HO
H=2 O=2
300
one element replaces another element in the compound is a .............reaction
single replacement
300

What is an Enzyme?

A biological catalyst

300
Preservatives are considered 

inhibitors

400
if you have 2 atoms of Hydrogen in the reactants how many should be in the products?
2
400
When balancing Ahmed changed the subscript. Is that a correct way of balancing?
No
400
AX + BY = BX + AY is what type of reaction?
Double replacement
400

Inhibitors ___________ the activation energy 

increase

400

The energy of the reactants in an exothermic reaction is ________ than that of the products 

higher

500
10 grams C+ 5 grams H = ? grams CH
15
500
How do you the reaction is balanced?
number of elements in the reactants = products
500
Which two types of reactions are opposite of each other?
Synthesis and decomposition
500
If the energy of the reactants are higher than the energy of the products. the reaction is exothermic. True or false?
True
500

The "bump" on an endothermic reaction for an inhibitor is ________ than the normal activation energy. 

higher