If 279 grams of iron react with an excess of oxygen, as shown in the balanced equation below, how many grams of iron (iii) oxide can be formed? 4fe + 3o2 yields 2fe2o3 139.5 grams 199.5 grams 399 grams 1596 grams

The pressure in a fluid is affected by which characteristics of that fluid

The combustion of methane, ch4, releases 890.4kj/mol. that is, when one mole of methane is burned,890.4 kj are given off to the surroundings. this meansthat the products have 890.4 kj less than the reactants.thus, ah for the reaction = - 890.4 kj. a negative symbolforah indicates an exothermic reaction.ch (g) + 20 (g)> co2 (g) + 2 h0 (1); ah = - 890.4 kga) how much energy is given off when 2.00 mol of ch,are burned? b) how much energy is released when 22.4g of ch. areburned?

The biosphere of the earth is made up of . a. inorganic b. organic