if a sample that contains oxygen and hydrogen gasses has the pressure of 234 mm Hg in a 2.50 ml flask at 25 C the same sample of gasses is moved to 50.0 ml flask at 25C what is the new pressure of gas?

We just started a new lesson in chemistry and everyone hates it and i dont get it one bit. i hate school. h el p. balanced equationc3h8+5o2-> 3co2+4h2o1.) if you start with 14.8g of propane(c3h8) and 3.44g of oxygen, which is the limiting reactant -check my answer 2.)what mass of excess reagent is left over? 3.)what mass of carbon dioxide can be made? 4.)what mass of water is produced?

Asingle atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it? ok o z

Acamcorder has a power rating of 17 watts. if the output voltage from its battery is 7 volts, what current does it use?units: