A gas sample in a balloon contains 4.0 moles of gas at a particular pressure, volume, and temperature. If your balloon springs a leak, and the volume decreases to 1/2 of the original amount before you can plug the leak, how many moles of gas have you lost. The temperature and pressure remain the same. A sample of o2 gas was collected over H2O in a 550ml container at 21C and at a barometric pressure of 743 torr. The vapor pressure of water is 19.0 torr at that temp. How many moles of O2 were collected?

In an exothermic reaction the bonding energy of the product is: less than the reactants same as the reactants greater than the reactants dependent upon the presence of a catalyst

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. 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

Three alkali metals in group 1 are a. calcium, strontium, barium b. boron, aluminum, gallium c. sodium, potassium, rubidium d. fluorine, iodine, chlorine