All of the helium gas in a 2.0 liter balloon at a pressure of 101.3 kpa is added to a 4.0 liter tank that holds argon at 303.9 kpa of pressure. after the two gases are combined, what are the partial pressures of each gas? a) 50.65 kpa he; 253.25 kpa ar b) 50.65 kpa he; 303.9 kpa ar c) 101.3 kpa he; 303.9 kpa ar d) 202.6 kpa he; 303.9 kpa ar

If 90.0 grams of ethane reacted with excess chlorine,how many grams of dicarbon hexachloride would form

Inside a flashbulb, oxygen surrounds a thin coil of magnesium. when the flashbulb is set off, a chemical reaction takes place in which magnesium combines with oxygen to form magnesium oxide. which of the chemical equations matches the reaction above? a. mg + o2 mgo2 + energy b. 2mg + o mg2o + energy c. 2mg + o2 2mgo + energy d. mg + o mgo + energy

Which of the following is a conclusion that resulted from ernest rutherford’s scattering experiment? (will mark brainliest) a. the nucleus is negatively charged b. the atom is a dense solid and is indivisible c. the mass is conserved when atoms react chemically d. the nucleus is very small and the atom is mostly empty space