How many number of oxygen molecules are required to produce 0.22 g of CO2 according to the reaction? c+o2=co2

What’s the scientific notation for the number 6,840,000,000

Which terms are used to identify pure substances

Which of your 24 wells had indications that a chemical reaction occurred? how were you able to tell that a chemical reaction occurred? which of your 24 wells had indications that a physical reaction occurred? how were you able to tell that a physical reaction occurred? report on both mixing and evaporation. make a general statement about whether your hypotheses were validated or rejected. must your hypotheses be correct for this to be a successful laboratory?