Show your work to the following with an explanation: A student collects 265 mL of gas at 25°C and 750 mm Hg. What is the volume of the gas at STP?

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

An atom with 7 protons, 6 neutrons, and 7 electrons has an atomic mass of amu. (enter a whole number.) numerical answers expected! answer for blank 1:

What is the area in square meters of 448 g ai foil that has a thickness of 23921 nm? the density is 2.70 g/cm