Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right). This makes it easy to isolate and measure the amount of gas produced. Suppose the H₂ gas evolved by a certain chemical reaction taking place at 30.0 °C is collected over water, using an apparatus something like that in the sketch, and the final volume of gas in the collection tube is measured to be 116. mL. X collected 3 gas water chemical Sketch of a gas-collection apparatus Calculate the mass of H₂ that is in the collection tube. Round your answer to 2 significant digits. You can make any normal and reasonable assumption about the reaction conditions and the nature of the gases. reaction

Consider the apparatus shown below with the valve closed. The volume and pressure of each gas is indicated. F2 N2 Valve 3.00 L 6.00 L 2.00 atm 4.00 atm When the valve is opened the two gases mix uniformly. At that point, what is the mole fraction of fluorine in the mixture? none of the answers are correct O 0.333 0.200 O 0.500

Solid sodium chlorate (NaClO3) decomposes at high temperatures according to the following balanced chemical equation:   a. A mixture contains NaClO3 and another compound that does not decompose. A sample from the mixture was heated until the formation of gas stops. The oxygen gas produced was collected over water at 25.0 ° The volume of gas is 622 mL measured at 1.00 atm. Find the number of moles of the gas produced. The vapor pressure of water at 25.0 °C is 0.0418 atm. R = 0.08206 L·atm/mol·K   b. Calculate the mass of NaClO3 that was decomposed to produce the above gas sample. (Na = 22.99 g/mol, Cl = 35.45 g/mol, O = 16.00 g/mol)     c. Calculate the mass percentage of NaClO3 in the original sample if the mass of the sample that was heated is 0.2532 g.

What volume of ammonia gas, measured at 547.9 mmHg and 27.6oC, is required toproduce 8.98 g of ammonium sulfate according to the following balanced chemical equation?2NH3(g) + H2SO4(aq) → (NH4)2SO4(s)a. 0.000992 Lb. 0.00397 Lc. 1.16 Ld. 18 Le. 4.65 L

Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right). This makes it easy to isolate and measure the amount of gas produced. Suppose the CO gas evolved by a certain chemical reaction taking place at 45.0 °C is collected over water, using an apparatus something like that in the sketch, and the final volume of gas in the collection tube is measured to be 145. mL. g x10 17 Sketch of a gas-collection apparatus X collected gas Calculate the mass of CO that is in the collection tube. Round your answer to 2 significant digits. You can make any normal and reasonable assumption about the reaction conditions and the nature of the gases. water chemical reaction

A gas storage cylinder in an ordinary chemical laboratory measures 7.7 cm wide and 31. cm high. This is the label on it. Contents: N, gas Pressure: 16.5 atm If the cylinder is opened and the gas allowed to escape into a large empty plastic bag, what will be the final volume of nitrogen gas, including what's collected in the plastic bag and what's left over in the cylinder? Write your answer in liters. Round your answer to 2 significant digits.

Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right). This makes it easy to isolate and measure the amount of gas produced. Suppose the CO gas evolved by a certain chemical reaction taking place at 40.0 °C is collected over water, using an apparatus something like that in the sketch, and the final volume of gas in the collection tube is measured to be 44.1 mL. x10 collected X gas water Sketch of a gas-collection apparatus Calculate the mass of CO that is in the collection tube. Round your answer to 2 significant digits. You can make any normal and reasonable assumption about the reaction conditions and the nature of the gases. chemical reaction

A 25.5 mL sample of CO, gas at 855 torr and a temperature of 25.00 °C is heated at constant pressure to 375 °C. Predict the volume of the CO2 gas after this process. Hint: you must convert torr to atm 760 torr = 1 atm Hint: you must convert °C to K by adding 273 O 854 mL O 451 mL O 122 mL O 25.9 mL O 55.5 mL O 96.1 mL O 2130 mL O 273 mL

Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right). This makes it easy to isolate and measure the amount of gas produced. collected gas chemical water reaction Suppose the CO, gas evolved by a certain chemical reaction taking place at 45.0 °C is collected over water, using an apparatus something like that in the sketch, and the final volume of gas in the collection tube is measured to be 39.5 mL. Sketch of a gas-collection apparatus Calculate the mass of CO, that is in the collection tube. Round your answer to 2 significant digits. You can make any normal and reasonable assumption about the reaction conditions and the nature of the gases.

A gas storage cylinder in an ordinary chemical laboratory measures 2.5 cm wide and 10. cm high. This is the label on it. Contents: N, gas Pressure: 17.8 atm If the cylinder is opened and the gas allowed to escape into a large empty plastic bag, what will be the final volume of nitrogen gas, including what's collected in the plastic bag and what's left over in the cylinder? Write your answer in liters. Round your answer to 2 significant digits. L x10