Provide a structure for the following compound: ei mass spectrum: two molecular ions of about equal intensity at m/z = 180 and 182; ir: 1740 cm–1; a. δ 1.30 (3h, t j = 7 hz); b. δ 1.80 (3h, d, j = 7 hz); c. δ 4.23 (2h, q, j = 7 hz); d. δ 4.37 (1h, q, j = 7 hz).

Which of the following is a testable hypothesis? a. if i brush my teeth, i will get fewer cavities than if i don't brush my teeth. b. green toothpaste tastes better than blue toothpaste or red toothpaste. c. smart, careful, healthy people always brush their teeth. d. it's wrong to not brush your teeth before you have an important conversation with someone.

We are hoping to create 5.72 grams of glucose. the plant was given 4.75 liters of co2 and 2.81 g of h20. which reactant was the limiting reagent? how much excess mass did we have of the other reactant?

What is the enthalpy of combustion (per mole) of c4h10 (g)? –2,657.5 kj/mol –5315.0 kj/mol –509.7 kj/mol –254.8 kj/mol