PLEASE HURRY

Which substance loses electrons in a chemical reaction?

A. the one that is oxidized, which is the oxidizing agent
B. the one that is reduced, which is the reducing agent
C. the one that is oxidized, which is the reducing agent
D. the one that is reduced, which is the oxidizing agent

Given that the molar mass of nano3  is 85.00  g/mol, what mass of nano3  is needed to make 4.50  l of a 1.50  m nano3solution? use  .6.75 g18.9 g255 g574 g

What are the spectator ions in 2h+ + so42- + ca2+ + 2r → caso4 + 2h+ + 21?

*will mark you brainliest + 15 points ** why does the equilibrium of a system shift when the pressure is increased? a. to maximize the stress on the system b. to stop restoring equilibrium to the system c. to increase the total moles of gas in the system d. to decrease the total moles of gas in the system