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.

Q1.A glass vessel was filled with an unknown quantity of nitrogen gas and the pressure at 28°C was 4.2 x 10⁴Pa. Oxygen gas was introduced at the same temperature until the pressure was to 1.013 ×10⁵Pa. (I) calculate the partial pressures of nitrogen gas and oxygen gas (II) calculate the mass ratio of the two gases. ( N=14, O=16) Q2. When temperature is increased by 10K, what happens to the rate of reaction? Why is it so?

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

(A) A sample of carbon dioxide gas at a pressure of 1.14 atm and a temperature of 27.1 °C, occupies a volume of 475 mL. If the gas is compressed at constant temperature until its pressure is 1.38 atm, the volume of the gas sample will be mL. (B) A sample of helium gas at a pressure of 0.885 atm and a temperature of 28.4 °C, occupies a volume of 12.4 liters. If the gas is compressed at constant temperature to a volume of 4.05 liters, the pressure of the gas sample will be atm.

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.

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?

The ideal gas law describes the relationship between pressure (P), temperature (T), volume (V), and the number of moles of gas (n). PV = nRT The additional symbol, R, represents the ideal gas constant. The ideal gas law is a good approximation of the behavior of gases when the pressure is low and the temperature is high. (What constitutes low pressure and high temperature varies with different gases.) In 1873, Johannes Diderik van der Waals proposed a modified version of the ideal gas law that better models the behavior of real gases over a wider range of temperature and pressure. na P + ")(v – nb) = nRT In this equation the additional variables a and b represent values characteristic of individual gases.