Piers & aida added 1.25 ml aliquot of h2o2 to a beaker containing 5.0 ml of 6 m h2so4 and 90 ml of water. the hydrogen peroxide solution required 19.00 ml of 0.0225 m mno4- to reach the equivalence point using the orp probe. 5 h2o2(aq) + 2 mno4–(aq) + 6 h+(aq) → 5 o2(g) + 2 mn+2(aq) + 8 h2o(ℓ) what is the molarity of the original h2o2 solution?

Nitric oxide (no) can be formed from nitrogen, hydrogen and oxygen in two steps. in the first step, nitrogen and hydrogen react to form ammonia: n2(g) + 2 h_2(g) rightarrow 2 nh_3 (g) delta h = -92. kj in the second step, ammonia and oxygen react to form nitric oxide and water: 4 nh_3(g) + 5 o_2(g) rightarrow 4no(g) + 6 h_2o(g) delta h = -905. kj calculate the net change in enthalpy for the formation of one mole of nitric oxide from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .

Asample of neon occupies a volume of 375 ml at stp. what will be the volume of neon if the pressure is reduced to 90.0 kpa? a. 422 ml b. 422 l c. 333 ml d. 333 l

Which characteristics can be used to differentiate star systems? check all that apply.