Choose the correct arrangement to obtain iron III hydroxide from iron II oxide A adding dilute acid - adding ammonia solution
B oxidation - adding dilute acid- adding ammonia solution
C reduction - adding dilute acid - oxiadtion
D oxidation - adding concentrated acid - adding ammonia solution

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

A5.000 g sample of niso4 h2o decomposed to give 2.755 g of anhydrous niso4. what is the formula of the hydrate? what is the full chemical name for the hydrate? what is the molar mass of the hydrate? niso4•_h2o what is the mass % of water in the hydrate?

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?