In which two types of reactions do opposite chemical changes occur? double replacement and combustion
single replacement and double replacement
synthesis and decomposition
combustion and synthesis

Perform the following mathematical operations and report the answer to the appropriate number of significant figures 5.87998 + 3.100

How many ions that have a +1 charge will bond with an ion that has a -2 charge

Arock can be broken down into different kinds of substances by physical processes. no chemical reactions are needed to separate different parts of a rock into pure substances. this is because a rock is a(n)