Which chemical equation is balanced? a. co2 + 4h2 -> ch4 + 2h2o b. 4co2 + h2 -> ch4 + 2h2o c. co2 + 4h2 -> 2ch4 + 2h2o d. 2co2 + 2h2 -> 2ch4 + 2h2o

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

*will mark you brainliest + 15 points ** why does the equilibrium of a system shift when the pressure is increased? a. to maximize the stress on the system b. to stop restoring equilibrium to the system c. to increase the total moles of gas in the system d. to decrease the total moles of gas in the system

What is the approximate vapor pressure when the gas condenses at 70 degrees celsius