Water can be formed in the following reaction: 2h2 + o2 —> 2h2o. if you have 12 moles of hydrogen gas (h2), how many moles of oxygen gas (o2) will you need to make as much water as possible?

(enter just the number; not the number and units)

2points what is the job of a scientist? a. to answer ethical questions. b. to write laws based on his or her knowledge. c. to ask and answer scientific questions. d. to ignore facts that do not support his or her theory.

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks. energy was destroyed inside the blocks. energy was absorbed into the blocks from outside the system. energy was transferred from the warmer block to the cooler block.

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit