Remark
The question with these kind of problems is "Which R do you use?" That's where dimensional analysis is so handy. You must look at the units of the givens and choose your R accordingly. You'll see how that works in a moment.
You need to list the givens along with their units and in this case the property you want to solve for. You need all that to determine the R value
Givens
n = 0.25 moles
T = 35°C = 35 + 273.15 = 308.15°K
V = 6.23 L
Pressure = P in kPa
Which R
The units of the R you want has to have units of moles, kPa, °K and liters
The R that you want is 8.314
<em><u>Formula</u></em>
PV = nRT
P 6.23 = 0.25 * 8.314 * 308.15 Combine the left
P*6.23 = 640.5
P = 640.5/6.23 = 102.81 The answer should be 100 kpA of 1.0 * 10^2 kPa
because the number of moles has only 2 sig digs.
But if sig digs are not a problem 102.8 is likely close enough.
Second Question
You are going to have to clean up the numbers. I think I've got only 1 chance at this. The partial pressures of the 2 gases will add up to the total pressure. So the total pressure was 100 approx and the water vapor was 3.36 kPa. The difference is
Total = air + water vapor
100.18 = air + 3.36 about Subtract 3.36 from both sides.
100.18 - 3.36 = 96.82 about. Pick the answer that is closest to that. I'll clean up the numbers if I can.
Answer C
The answer is: B. Collisions between gas particles are elastic; there is no net gain or loss of kinetic energy.
The Kinetic Molecular Theory of Matter
1) Matter is composed of tiny particles (in this example oxygen molecules).
2)These particles are in constant, random motion and possess kinetic energy.
3) The particles also have potential energy due to intermolecular attractions.
4) The average kinetic energy increases as the temperature increases.
5) Energy is transferred from one particle to another during collisions, but at constant temperature the total energy of the system is constant.
Kinetic energy is energy associated with motion.
Answer:
Dip one end of the blue litmus paper into the solution take it out if it turns red then its acidic.
silver
Hydrogen gas
carbon dioxide
beryllium
magnesium chloride
Sorry if any are wrong i tried
Answer:
3.10g
Explanation:
Please see the attached picture for the full solution.