Question 1 0.5 pts Which of the gas samples shown below in identical containers has the...
Question 26 2 pts Which of the following containers of a gas will have the highest number of moles of the gas? A B C Impossible to determine. Gas B Gas A Gas C
The following gases are stored in identical containers at the conditions specified. Which of the gases has the HIGHEST pressure? 15 g He at 250K 96 g O2 at 200K 71 g Cl2 at 150K 66 g CO2 at 300K
#1) Which of the following gas samples contains the greatest mass of gas molecules? a. 1 L of He at STP b. 1 L of Xe at STP c. 1 L of H2 at STP d. All are the same #2) Which physical property/state is incorrectly matched? a. liquids - rigid shape b. gases - easily compressed c. gases and liquids - flow d. solids - higher density than gases e. liquids - incompressible
rowan.instructure.com Question 3 0.5 pts Which of the following are assumptions of the independent samples t-test? Skewed population Sample size over 30 Homogeneity of variance Related samples Question 4 0.5 pts What is the term called in an independent samples t-test that averages together the variances of the two samples? Mean variance Average variance Standard error of the difference Pooled variance Question 5 0.5 pts How is the standard error of the difference (used in independent samples t-tests) different from...
QUESTION 3 0.5 points Save Answer If nitrogen gas has a density of 1.14 g/L, and an unknown gas has a density of 5.67 g/L at the same temp and pressure, what is the ratio of the rate of effusion of the known gas to the rate of effusion of nitrogen? rate effusion unknown - 2 rate effusion N2 QUESTION 4 0.5 points Save Answer The combustion reaction for octane burning in oxygen is: 2 C8H18 (1) + 25 O2(g)...
Answer both questions please and thank you!!! QUESTION 3 0.5 points If nitrogen gas has a density of 1.14 g/L, and an unknown gas has a density of 3.41 g/L at the same temperature and pressure, what is the ratio of the rate of effusion of the known gas to the rate of effusion of nitrogen? rate effusion unknown rate effusion N2 ? QUESTION 4 0.5 points The combustion reaction for octane burning in oxygen is: 2 C8H18 () 25...
0.5 points Save Answer g/L. QUESTION 3 The density of nitric oxide (NO) gas at 0.970 atm and 34.9 °C is O 1.15 O 10.2 O 0.0384 O 0.339 O 0.869 QUESTION 4 0.5 points Save Answer Of the following gases, has density of 0.190 g/L at 308 K and 1.20 atm. OOOOO 1:1. .... . .. . .. .... .......
Question 1 0.5 pts Which of the following decreases the pressure of a gas? none of the above decreasing the temperature increasing the volume O all of the above decreasing the number of gas molecules Question 2 0.25 pts If a piston compresses air in a steel cylinder, what happens in the cylinder? the volume decreases, and the presure decreases none of the above o the volume decreases, and the pressure increases the volume increases, and the pressure decreases the...
QUESTION 1 0.5 points Save Answer The weak acid, HX, is neutralized by sodium hydroxide as shown below: HXiaq) + NaOH(ac) + NaCN aql + H200). Suppose you carried out this reaction in a coffee cup calorimeter using 50.0 mL of 0.500 M HX and 0.500 mL of 0.500 M NAOH If the temperature of the calorimeter increases by 1.4°C, what is the enthalpy of this neutralization reaction (in kJ/mol? Assume the density of the solution is 1.00g/mL and that...
D Question 3 0.5 pts If the pressure of a given sample of He gas is 1.57 atm at 18°C and the volume is 0.5 L, how many He atoms will be present? 2.0 x 1022 6.7 x 1022 0.033 2.0 x 1023 0.024