The reaction: is known to have a value of -9.7737 kJ. The rate of the reaction was studied at a series of different concentrations at 335 K. The following initial rates were obtained: Experiment (M) Rate of reaction (M/s) 1 0.00100 0.003806 2 0.00200 0.003806 3 0.00400 0.003806 If a reaction were set up with 1.00 M solution A, with no solution B present, how long will the reaction take to

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? a. the balloons both rise. the cold balloon is larger than the warm balloon. b. the balloons rise at the same rate. both balloons are the same size. c. the warm balloon expands and rises. the cold balloon shrinks and sinks. d. the cold balloon expands and rises. the warm balloon shrinks and sinks.

Which is a chemical property of iron? a. it forms iron oxide (rust) when exposed to moisture and air. b. it is a gray–black metal that is hard to the touch. c. it has a melting point of 2795°f (1536°c). d. it is a good conductor of heat

Correct relationship between molecular formula and empirical formula