A mixture of gases in a container has a pressure of 63.2 atm. If the pressure of CO2 gas is 27.8 atm and the pressure of O2 gas is 31.7 atm, what is the pressure of CH4 gas.

Select the correct answer. given: 2libr + ba → babr2 + 2li in this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced? a. 1.18 mol b. 2.37 mol c. 4.73 mol d. 16.4 mol e. 32.9 mol

6. using 3 – 4 sentences explain (in your own words) why water expands when it freezes? 7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation.

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?