Duncan takes a break from studying and goes to the gym to swim laps. If swimming burns 7.85×105 cal per hour, how many kilojoules does swimming burn in that same amount of time? In other words, convert 7.85×105 cal to kilojoules. Express your answer numerically in kilojoules.

The following reaction shows the products when sulfuric acid and aluminum hydroxide react. al(oh)3 + h2so4 → al2(so4)3 + h2o the table shows the calculated amounts of reactants and products when the reaction was conducted in a laboratory. initial mass and yield sulfuric acid aluminum hydroxide initial amount of reactant 40 g 15 g theoretical yield of water from reactant 14.69 g 10.38 g what is the approximate amount of the leftover reactant? 11.73 g of sulfuric acid 10.33 g of sulfuric acid 11.12 g of aluminum hydroxide 13.67 g of aluminum hydroxide

Asap! how do you lengthen a pattern piece? (family and consumer science, sewing)

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins