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 =

A sample of methane gas at a pressure of 0.947 atm and a temperature of 29.0 °C, occupies a volume of 711 mL. If the gas is allowed to expand at constant temperature until its pressure is 0.504 atm, the volume of the gas sample will be | mL.

(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.

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.

4.) The equivalent pressure gauge of a compound gauge measuring a pressure of 25.3 inches mercury isL Density of mercury is 13.53 g/cm3: Express your answer in kilopascal.

A cylinder is filled with 10.0 L of gas and a piston is put into it. The initial pressure of the gas is measured to be 113. kPa. The piston is now pulled up, expanding the gas, until the gas has a final volume of 20.0 L. Calculate the final pressure of the gas. Be sure your answer haş the correct number of significant digits. piston cylinder gas olo Ar ||kPa x10