How many moles of O2 were produced in a decomposition reaction of H2O2 if the barometric pressure was 0.980 atm, the temperature was 298 K and the volume of O2 gas collected was 0.0500 HELP ME PLISS

Balance the following reaction. as2s3 + 9o2 → 2as2o3 + so2

The solubility of barium nitrate is 9.02 g/100 g h2o at 20°c. a 15.2 g sample of barium nitrate is added to 200.0 g of water at 20°c. is the solution saturated, unsaturated, or supersaturated? a. unsaturated b. saturated c. supersaturated

The goal of this experiment was to answer the question "what is the effect of a gas' temperature on its volume? " you formulated the hypothesis below. hypothesis: if a fixed amount of gas is heated, then the volume will increase because the heat will cause the molecules of gas to move faster and further apart. to test this hypothesis, you changed the of the gas between 0 and 100°c (273 and 373 k) and calculated the resulting of the gas.