If 315g of a substance reacts with 49g of another substance what will be the mass of the products after the reaction

Explanation:

we know that

The law of conservation of mass states that the total mass of substances taking part in a chemical reaction is conserved during the reaction.

therefore

To find out the mass of the products after the reaction, sum the mass of the substances

i believe the answer is a.

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them