How many grams of oxygen would be needed to produce 54g of water?

How are isotopes of the same chemical element alike? how are they different?

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. which of the cell's organelles has stopped working? a.the mitochondria b.the nucleus c.the vacuoles d.the endoplasmic reticulum

Which statement is true about market economies? government goals drive business decisions. people have the freedom to choose their jobs. several are market economies vist around the world