1)A sample of oxygen gas occupies 1.00 liter at 1.00 atmosphere (atm) of pressure. If the temperature remains constant, and the pressure on the oxygen gas is increased to 3.00 atmospheres, what is the new volume? 2)At STP, 0.280 L of a gas weighs 0.400 g. Calculate the molar mass of the gas

3)The density of a gas is 1.43 g/mole at STP. What is the gas?

4)A gas evolved during the fermentation of sugar was collected at 22.5°C and 702 mmHg. After purification its volume was found to be 25.0 L. How many moles of gas were collected?

5)Calculate the number of moles of CO2 in a 846 mL container at 76 oC and 3.5 atm

What is driving behind plate tectonics (plate movment)? a) gravity only b) inertia c) convection and gravity d) the sun theres no option for science so i picked chemistry. plz

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?

These questions are based on the attached photo. the experiment is about burning magnesium metal with oxygen. 1. write the balanced chemical equation for the reaction you are performing. 2. calculate the mass of magnesium metal used in each trial. o trial 1: o trial 2: 3. calculate the actual yield of magnesium oxide for each trial. o trial 1: o trial 2: 4. magnesium is the limiting reactant in this experiment. calculate the theoretical yield of mgo for each trial. o trial 1: o trial 2: 5. determine the percent yield of mgo for your experiment for each trial. o trial 1: o trial 2: 6. determine the average percent yield of mgo for the two trials. your company currently uses a process with a similar cost of materials that has an average percent yield of 91 percent. if the average percent yield of this process is higher than that, this could save the company money. what is your recommendation to the company? support your recommendation using your data, calculations, and understanding of stoichiometry gathered from this lab.