Answer:
Hi
Explanation:
A change in matter that produces one or more new substances is a chemical change (also called a chemical reaction). Burning and rusting are both examples of chemical changes. products.
Answer:
pure hydrogen is a pure substance even though it consists of many different types of molecules. what makes it pure substance is that it is free from contamination.
The sodium in soda lowers the melting point and makes the ice melt more slowly than it would in plain water because with the addition of any substance, there are fewer free water molecules available to form bonds together and freeze
sorry but if you are looking for an answer I don't know one. :(
Your answer is B. 6.02 x 1023 grams