Answer:just for the ponits
Explanation:ima be a jenna
Similar - Both are organic compounds and fossil fuels
Different - natural gas is made up of lighter organic compounds than petrolium
Answer:
Non-metals tend to gain electrons
Explanation:
Answer:
Explanation:
The formula of calcium nitride is Ca₃P₂.
The masses of each element are:
So, there are 61.94 g of P in 182.18 g of Ca₃P₂.
In 500 g of Ca₃P₂:
There are 
in 500.0 g of Ca₃P₂.
Answer:
The answers to your questions are below
Explanation:
Physical change is when matter changes its form but is still the same substance.
Chemical change is when matter changes its composition.
iron and oxygen from rust It's a chemical change because iron and oxygen form a new compound different from the reactants.
iron is denser brightly when ignited
. This is a chemical property because iron reacts with oxygen.
oil and water do not mix
it's a physical change, oil and water are in touch but they do not react.
mercury melts at -39°C it's a physical property because mercury changes from solid to liquid but it still is mercury.
