Fill in the blank to balance the following chemical equation:


2 Al + _____ H2SO4 --> Al2(SO4)3 + 3 H2


Match each chemical reaction to its type:



C3H8 + 5 O2 --> 3 CO2 + 4 H2O



2 H2O2 --> 2 H2O + O2



AgNO3 + KBr --> AgBr + KNO3



CuCl2 + Zn --> ZnCl2 + Cu



CaO + H2O --> Ca(OH)2

A

combustion

B

synthesis

C

decomposition

D

single replacement

E

double replacement


You suspect one of the products of a single replacement is hydrogen gas. How might you experimentally confirm your prediction? Choose the best option.



Watch for bubbles to form in solution which indicates a gas was produced.



Waft to detect an odor from the test tube.



Place a burning splint near the end of the test tube and listen for a 'pop' sound.



Hydrogen gas is never a product in a chemical reaction.


(PLEASE HELP FAST))))