What is the mass percent of oxygen in each of the following compounds? (show work) O2
Ca(NO3)2
H2O

Calculate the mass of oxygen in the given amount of each compound. (show work)
3.0 g O2
3.0 g Ca(NO3)2
3.0 g H2O

sorry idk the answer well to you i have a explaination

explanation: a formula which shows the arrangement of atoms in the molecule of a compound

the answer is either b or c

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