What will be the final volume of 100. ml of N2 at -20.0º C if you heated it to 10.0º C?

1-at atmospheric pressure a sample of Ne gas gas a volume of 155mL at 32C degrees. What volume in milliliters will the Ne gas occupy if the temperature is decreased to 12C degrees while the pressure remains constant? 2-How many mL of 3.5 M HCL is needed to prepare 125 mL of 0.5 M HCL by dilution? 3-A gas has a volume of 1.71 liters at a temperature of 87C and pressure of 775 torr. What is the pressure of the gas when the volume is increased to 2.3L at a temperature of 367C? 4-calculate the concentration in % (m/m) of a solution containing 30.1 g of NaBr dissolved in 400.0g of H2O. 5-what is the boiling point of an aqueous solution that contains 0.795 moles of NaCl per one kg of water?

Departmental Problems for Chapter 5: Gases In the 2015 AFC championship football game, it was alleged that the New England Patriots ber the rules by using underinflated footballs. NFL regulations require footballs to be inflated to between 12.5 and 13.5 psi (psi = pounds per square inch). [Note: this is gauge pressure, not ab- solute pressure.] One football actually used in the game was measured to have a pressure of onl 10.5 psi (gauge). One of the Patriots' coaches later alleged that the explanation was due simply gas behavior: pressure decreases as the temperature decreases. Let's examine that last claim. Suppose that the football remained sealed and nearly rigid (i.e. the volume and moles of gas within the ball did not change). A nearby airport measured the air pressure at game time to be 100.95 kPa. The temperature on the field at the start of the game was 51°F. Suppose that the ball was originally inflated in the locker room to the minimum pressure of 12.5 psi (gauge). In order…

An 93.1 mL sample of "wet" O2 (g) is collected overwater at 21.4oC and a barometric pressure of 755 mmHg(vapor pressure of water at 21.4oC = 19.11 mm Hg). a. What is the partial pressure of O2 (g) in the sample collected, in mm Hg? b.What is the volume percent O2 in the gas collected? c..How many grams of O2 are present in the sample?

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5-What volume of hydrogen gas at STP is produced from the reaction of 31.49 g of Mg? Balance the equation: ____Mg + ____ HCl -> ____MgCl2 + ____H2

80 g of CaCO3 is treated with 0.500 L of a 1.00M solution of HCl. What volume of CO2 gas, measured at 25˚C and 800. mm Hg can be obtained?                                                                         CaCO3(s)    +   2HCl(aq)    ®   CO2(g)    +   CaCl2(aq)  +  H2O(l) Show all equation and all calculations involved to get full marks. Hint: this is a limiting type question Use the following questions as guide and include them in your answer. the limiting reactant is? the maximum number of moles of CO2 gas that can be produced is? the volume of CO2 gas that can be produced from this reaction is?

25.) How many mol of H2 gas are produced from a reaction that yields 47.0 mL H2 at 758 mm Hg and 23.0°C? A) 18900 mol B) 0.00193 mol C) 1.93 mol D) 1.47 mol