Given: 4 hcl(g) + o2(g) → 2 h2o(ℓ) + 2 cl2(g) ∆h0 = −202.4 kj/mol rxn what is the expected energy change for the reaction of three moles of h2o and six moles of cl2? 1. 67.5 kj 2. -607.2 kj 3. -67.5 kj 4. 303.6 kj 5. -303.6 kj 6. 607.2 kj 7. 202.4 kj 8. 1821 kj

Nitrogen (n), phosphorus (p), and potassium (k) are the main nutrients in plant fertilizers. according to an industry convention, the numbers on the label refer to the mass percents of n, p2o5, and k2o, in that order. calculate the n: p: k ratio of a 30: 10: 10 fertilizer in terms of moles of each element, and express it as x: y: 1.0.

Match the acid base pairs by arranging the acid name with the conjugate base formula. hydrogen carbonate hydrogen phosphate carbonic acid read water sulfuric acid phosphoric acid a. co32- b. hso4- c. hco3- d. po43- e. h2po4- f. oh-

What does the mass of 0.7891 mol of ferric oxide (fe2o3)