Question 8 (2 points) A toy car has a density of 0.5 g/mL and weighs 85...
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)...
Status: Tries remaining: 2 Points possible: 1.00 If the density of aluminum is 2.70 g/mL and there are 453.9 grams in a pound, what is the volume (in ml) of an aluminum bar that weighs 13.0 lbs? Answer: CHECK
What is the mass of 85 ml of acetone which has a density of 0.79 g/ml?include the formula used and units in your answer
Question 2 (7.5 points) What is the density of a soil sample if 170 mL of the soil sample is 3.62% Carbon and 53.28 g of carbon dioxide was produced upon burning of the carbon in the soil. Give three significant figures in your answer.
A 3-kg toy car sits at the highest point of a 13-meter-high hill. The car begins to roll down the slope from rest. Assuming the car coasts freely, without any friction or air resistance, what is the car's speed at each of the indicated points? Use for the acceleration due to gravity, g - 9.80 m/s* Note: the diagram below is NOT to scale. Car's speed Car's speed Number Number m/s m/s 13 m r's speed Number 2 m 6...
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...
8. What is the density (g/mL) of a solid with mass of 4.75 g and a volume of 6.20 mL (10pts)? (1) 1.31 (2) 0.95 (3) 0.77 (4) 1.25 9. What is the mass (g) of a 275 ml solid with a specific gravity of 1.75 (10pts)? (1) 541.2 (3) 157.1 (2) 256.7 (4) 481.3 10. A patient needs 0.5 grams of medication two times per day. How many 250 mg tablets must he take per day (10pts)? (1) (3)...
a block of aluminium occupies a volume of 15.0 ml and weighs 40.5 g. what if its density in kg m^3?
A sample of a gas weighs 2.65 g and has a volume of 1061 mL at 705.0 torr and 38.0 °C. What is its molar mass? g/mol
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. .... . .. . .. .... .......