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Formula 4 Success
100

When writing a chemical equation, the substances on the left hand side of the arrow are the _____, while those on the right hand side are the ______.          


reactants; products

100

An exothermic reaction:

A) releases energy into the environment                

B) absorbs energy from the environment   


A) releases energy to the environment      

100

To balance a chemical equation, it is permissible to adjust the:               

A) coefficients     

B) formulas of the products                                     

C) subscripts                      

A) coefficients  

100

How many valence electrons in neon?

8

100

Write the formula for

potassium (K+1) bonding with iodine (I-1)   

KI

200

Chemical reactions can be represented by using a...           

A) chemical change

B) chemical equation

C) chemical formula                                         


B) chemical equation

200

If the addition of heat is required to make this reaction take place, the reaction must be?

A) endothermic                    

B) exothermic                           


A) endothermic

200

To balance this reaction the coefficient that needs to be placed before the     Potassium sulfate is:

Al2(SO4)3   +  KOH   ->   Al(OH)3  + K2SO4

A) 2                 

B) 3                 

C) 4                 

B) 3  

200

How many valence electrons in aluminum?

3

200

The correct formula for a compound made from potassium (K+1  ) and oxygen (O-2) is:

 K2O

300

Why must a chemical equation be balanced?        


obeys the law of conservation of mass

300

Involving a solid, which would cause a reaction's rate to increase the most?

A) raise the temperature and break the solid into small pieces

B) lower the temperature and break the solid into small pieces

C) raise the temperature and keep the solid in a lump

A) raise the temperature and break the solid into small pieces

300

When the equation is balanced, the coefficient for sodium chloride would be:

 ___FeCl2  +  _Na2CO3   -> __FeCO3  + _NaCl

A) 6                      

B) 2                        

C) 3                         

B) 2  

300

What is the total number of valence electrons in MgCl2?

16

300

Write the following for

Iron (III)   +  CO3 -2 carbonate

Fe2(CO3)3

400

A group of atoms covalently bonded and carrying a charge, such as SO4 -2 , is called a:


polyatomic ion or radical

400

A substance that speeds up a chemical reaction is:     

A) an inhibitor    

B) a really adorable sweet "purr"fect ...catalyst

B) a catalyst    

400

Balance and classify the equation.

Al  +  HCl   ->   AlCl3 +    H2          

Type?

2 Al + 6 HCl   ->   2 AlCl3  +  3 H2          

Type- Single Replacement

400

What is the total number of valence electrons in H2SO4 ?

32

400

In the compound copper II oxide, the roman numeral II indicates

A) The number of valence electrons from copper ions

B) The number of valence electrons from oxygen ions

A) The number of valence electrons from copper ions

500

The atomic number of an element is determined by the number of this subatomic particle in the atom.

                


 protons                                                    

500

An increase in temperature generally increases the reaction rate because the molecules collide:

A) more frequently and with less energy

B) more frequently and with more energy

C) less frequently but with more energy

B) more frequently and with more energy

500

Balance & classify the equation.

C2H6 +  O2   ->   CO2   +    H2O    

Type?

1 C2H6   + 4 O2    ->  2 CO2  +   3 H2O

Type- Combustion

500

What is the total number of valence electrons involved in barium chloride ?

16

500

What is the oxidation number of magnesium as evidenced in the formula MgO?

+2