During the combustion of 5.00 g of butane in the presence of oxygen, 4.01 g of carbon dioxide and 3.55 g of water is given off. how much oxygen was needed to totally combust the butane?

iron combines with 4.00 g of copper (11) nitrate to form 6.01 g of iron (i) nitrate and 0.400 g copper metal. how much iron did it take to convert the cu(no3)2?

Question 1 which of the following allows cells to take in fluids? a. phagocytosis b. pinocytosis c. exocytosis d. receptor-mediated endocytosis question 2 molecules move along their concentration gradient (from areas of high concentration to low concentration) using active transport mechanisms. a. true b. false question 3 which of the following powers active transport (ie. provides the energy for)? a. glucose b. transport proteins c. atp d. phospholipids question 4 what type of lipid is a major component of the plasma membrane? a. cholesterol b. phosopholipids c. proteins d. triglycerides