Suppose we have made 3 measurements of the volume occupied by a gas and 20 measurements of its pressure. Which of the following statements is considered incorrect?(A). Of the 3 volume values ​​measured, we can safely discard the one that is furthest from the mean. It is not advisable to discard pressure values(B). There is no single criterion that we must follow in order to discard values. Therefore, it could be the case that each experimenter rejects a different number of data(C). It would be good practice for the number of discarded values ​​to be less than 5%(D). The so-called 4δ criterion advises discarding measurements that fall outside an interval with a center at the mean and a width 8 times the mean deviation

Is there a difference between a homogeneous mixture of hydrogen and oxygen in a 2:1 ratio and a sample of water vapor? Explain.

5. An experiment is performed to measure the mass percent of CaCO3(s) in eggshells. Five different samples of CaCO3(s) of known mass react with an excess of 2.0M HCl(aq) in identical sealed, rigid reaction vessels. The pressure of the gas produced is measured with a pressure gauge attached to the reaction vessel. Since the reaction is exothermic, the reaction system is cooled to its original temperature before Cooling the HCl(aq) to a lower temperature than it was in the original experiment the pressure is recorded. The experimental data are used to create the calibration line below. Using eggshells that are more finely powdered than those used in the original experiment 0.10- 0.09 0.08- Using 2.0M CH3COOH(aq) instead of 2.0M HCl(aq) 0.07 * 0.06- Reducing the volume of the reaction vessel 0.05 0.04 CLEAR ALL 0.03- 0.02- 0.05 0.10 0.15 0.20 Mass of CaCO3(s) (grams) The experiment is repeated with an eggshell sample, and the experimental data are recorded in the table below. Mass of…

12. (c) Potassium metal reacts with water. 2K(s) + 2H,0(1) → 2KOH(aq) + H,(g) 0.2346g of potassium is reacted with excess water. Calculate the volume of gas formed. The gas volume is measured in cm° at room temperature and pressure. answer =

Zn reacts with hydrochloric acid to give zinc chloride and hydrogen gas. A sample of 5 g of a Zn mineral requires 10 mL of commercial HCl of 37% purity, by weight and density 1.19 g/mL, to react completely. Find: a) The mass of zinc contained in the sample. b) The purity of the zinc mineral. c) The pressure exerted by the hydrogen gas collected in a 2 L container and at a temperature of 20ºC.please use conversion factors and mark the solutionsThe solutions should be : 3,92 g; 78,4%; 0,72 atm.I just dont know how to do it

The mass of the plastic bag, baking soda, and vinegar before the reaction was equal to the mass of the plastic bag, baking soda, and vinegar after the reactionBubbles were produced during the reaction which was evidence a gas was being producedThe plastic bag did not change in any way which indicated it was not involved in the reactionThe mass of the baking soda was exactly equal to the mass of the vinegar used to create the reaction.

Can you help me this question? This is a molar mass of gas-laboratory assignment.

If you mix 1.09 moles of He and 1.312 moles of Ne in a closed container, what is the resulting mole fraction of He? Your answer should be a dimensionless (unitless) number between 0 and 1.

6. At 100°C and 16.0 kPa, the mass density of phosphorus vapor is 0.6388 kg/m³. What is the molecular formula of phosphorus under these conditions?

P1A.10 Ozone is a trace atmospheric gas which plays an important role in screening the Earth from harmful ultraviolet radiation, and the abundance of ozone is commonly reported in Dobson units. Imagine a column passing up through the atmosphere. The total amount of O3 in the column divided by its cross-sectional area is reported in Dobson units with 1 Du =0.4462 mmol m−2. What amount of O3 (in moles) is found in a column of atmosphere with a cross-sectional area of 1.00 dm2 if the abundance is 250 Dobson units (a typical midlatitude value)? In the seasonal Antarctic ozone hole, the column abundance drops below 100 Dobson units; how many moles of O3 are found in such a column of air above a 1.00 dm2 area? Most atmospheric ozone is found between 10 and 50 km above the surface of the Earth. If that ozone is spread uniformly through this portion of the atmosphere, what is the average molar concentration corresponding to (a) 250 Dobson units, (b) 100 Dobson units?