Question 4 5 pts What mass (in grams) of C3Hg is required to fill an 18.9...
QUESTION 8 What is the mass percent of a solution prepared by dissolving 18.9 grams of solid into 39.5 grams of water? OA) 47.8% O B) 58.4% C) 32.4% OD) The identity of the compound must be known. E) none of the above QUESTION 9 1 points What is the molarity of a solution prepared by dissolving 54.3 g of Ca(NO3)2 into 355 ml of water? A) 0.331 M B) 0.932 M C) 0.117 M D) 1.99 M E) none...
50. What mass of helium, in grams, is required to fill 5.0-L balloon to a pressure of 1.1 atm at 25°C?
What mass of neon gas is required to fill a 4.32-L container to a pressure of 1.36 atm at 21°C?
What mass of neon gas is required to fill a 4.37-L container to a pressure of 1.28 atm at 27°C?
O 18.9 g Question 28 5 pts In a given diffusion apparatus and under identical conditions, an unknown noble gas diffuses twice as fast as HBr gas (molar mass = 80.91 g/mol). What is the gas? Hint: Determine molar mass of the gas and compare with the molar masses of the noble gases. O Ne Xe O He O Ar 5 pts utan 20
Question 4 1pts What is the mass of excess reactant (in grams) that remains after the limiting reagent produces the maximum amount of phosphorus pentachloride possible upon the reaction of 4.23 g of phosphorus with 15.02 g of chlorine according to the following reaction: P4(s)+ 10 Cl2( 4 PCI5 ( Give your answer to 2 decimal places, fill in the number ONLY! 1 pts Question 5 Fine wires of masnes Um burn readiy in oxvgen to 603 PM roduce imaanestum.axicie.1l...
Question 4 5 pts How many grams are contained in 2.75 x 1020 carbon atoms? O 5.48 x 10-3gC O 1.82 x 10 g 2.63 x 1080 O 3.81x 10sgC
elp Center 3.03 Incorrect Question 10 0/2 pts A sample of propane gas cocuples 27 centimeter cube at 295 K. What is the final volume (in lives) at 1541 140.9 Incorrect 0/2 pts Question 11 A sample of laughing gas occupies 0.28 L at 14.7 psi and -80.0°C. If the volume of the gas is 0.475 L at 37.0°C, what is the pressure in psl? 2.51 0/2 pts Incorrect Question 12
QUESTION 1 What will be the pressure of 52.5 grams of oxygen gas in a glass container with a volume of 6 L at 15.4 °C? QUESTION 2 At what temperature in °C does 37.34 g of oxygen gas occupy 18.17 L at 622 mm Hg? QUESTION 3 Consider the reaction between hydrogen gas and oxygen gas to form water: 2 H2(g)O2(g)-»2 H20(g) How many grams of water could be produced by the reaction of 5.1 liters of hydrogen with...
Question 1 1 pts Calculate the mass of potassium chloride, KCI, (in grams) formed when 7.00 g of chlorine gas is allowed to react with 5.00 g of potassium. (write the chemical reaction first) 7.36 7.38 14.7 4.77 9.53 Question 2 1 pts Carbon dioxide is produced in the following reaction: 5 H2C204(aq) + 2 KMnO4 (aq) + 3 H2SO4 (aq) → 10 CO2(g) + 2 MnSO4 (aq) + K2SO4 (aq) + 8 H20 (1) What is the limiting reagent...