Description : Which one of the following is largest? w) the number of molecules in 2 grams of hydrogen gas x) the number of molecules in 60 grams of lead sulfate y) the number of molecules in 20 liters of oxygen gas at standard temperature and pressure z) the population of the United States
Last Answer : ANSWER: A - THE NUMBER OF MOLECULES IN 2 GRAMS OF HYDROGEN GAS
Description : At what centigrade temperature will 1 mole of a gas under 1 atmosphere of pressure occupy 22.4 liters?
Last Answer : ANSWER: ZERO DEGREES CENTIGRADE
Description : At one atmosphere, a cylinder with movable piston contains 2,000 milliliters of gas. If the pressure is increased to 5 atmospheres and the temperature remains unchanged, what is the new volume of the gas? w) 10,000 milliliters x) 400 milliliters y) 1,000 milliliters z) 4,000 milliliters
Last Answer : ANSWER: X -- 400 MILLILITERS
Description : At 0°C, a gas occupies 22.4 liters. How nuch hot must be the gas in celsius and in kelvin to reach volume of 25.0 literes?
Last Answer : At 0°C, a gas occupies 22.4 liters. How nuch hot must be the gas in celsius and in kelvin to reach volume of 25.0 literes?
Description : How many molecules are present in 2.5 liters of gas at STP? w) 5.6 x 1024 molecules x) 1.5 x 1024 molecules y) 6.0 x 1023 molecules z) 6.7 x 1022 molecules
Last Answer : ANSWER: Z -- 6.7 X 1022 MOLECULES
Description : The volume of a gas at `0^(@)C` and 760 mm pressure is 22.4 c c. The no . Of molecules present in this volume is
Last Answer : The volume of a gas at `0^(@)C` and 760 mm pressure is 22.4 c c. The no . Of molecules present in this volume is ... `10^(-5)N_(A)` D. `10^(-2)N_(A)`
Description : The maximum delivery pressure of compressors can be upto __________ atmospheres. (A) 10 (B) 100 (C) 250 (D) 1000
Last Answer : (D) 1000
Description : At constant temperature the pressure of 22.4 dm^3 volume of an ideal gas was increased from 10^5 kPa to 210 kPa, New volume could be -
Last Answer : At constant temperature the pressure of 22.4 dm3 volume of an ideal gas was increased from 105 kPa to 210 kPa, New ... 2 dm3 c. 22.4 dm3 d. 5.6 dm3
Description : In thermodynamics the standard pressure is 100.0 kpa . What is this value in units of atmospheres?
Last Answer : 1 atm
Description : The ratio of spacing (d) for for simple cubic lattice, d(100) :d(110) :d(111) a. 1 : 0.707: 0.669 b. 1: 1.414: 0.577 c. 1: 0.707 : 0.577 d. 1: 0.707 : 1.154
Last Answer : c. 1: 0.707 : 0.577
Description : How many moles of an ideal gas will occupy a volume of 20 liters at 3.5 ATM and 280K?
Last Answer : The number of moles is 3,046.
Description : Pick out the wrong statement: (A) Greater is the kinematic viscosity of the liquid, greater is the thickness of the boundary layer (B) Blowers develop a maximum pressure of 2 atmospheres ( ... factor in case of turbulent flow of liquids in pipe depends upon relative roughness & Reynolds number
Last Answer : (C) Friction losses in pipe fittings are generally expressed in terms of velocity heads
Description : Which gases are found in the atmospheres of the gas giantes?
Last Answer : Hydrogren and helium
Description : According to Avogadro's law A. the product of the gas constant and the molecular mass of an ideal gas is constant B. the sum of partial pressure of the mixture of two gases is sum of the ... all gases, at the same temperature and pressure, contain equal number of molecules D. all of the above
Last Answer : Answer: C
Description : The pressure exerted by an ideal gas is __________ of the kinetic energy of all the molecules contained in a unit volume of gas. A.one-half B.one-third C.two-third D.three-fourth
Description : Under which of the following conditions does the behavior of a real gas resemble that of an ideal gas? Is it: w) under all conditions of temperature and pressure x) only at very high pressure ... when the gas is near condensation z) only at low densities when the molecules are relatively far apart
Last Answer : ANSWER: Z -- ONLY AT LOW DENSITIES WHEN THE MOLECULES ARE RELATIVELY FAR APART
Description : Is 6 gallons greater than 22 liters?
Last Answer : Need answer
Description : How far away from the surface of the Earth does the acceleration due to gravity become ½ of its value at the surface of Earth? It is at a (a) Distance equal to radius (b) Distance equal to half the radius (c) Distance equal to twice the radius (d) Distance equal to 0.414 times the radius
Last Answer : Ans:(d)
Description : The unit vector to the points p1(0,1,0), p2(1,0,1), p3(0,0,1) is a) (-j – k)/1.414 b) (-i – k)/1.414 c) (-i – j)/1.414 d) (-i – j – k)/1.414
Last Answer : a) (-j – k)/1.414
Description : a gas has a pressure of 766.7 torr at a temperature of 10.0°C. the sample contains 2.35 moles of xenon. what is the volume of the gas in liters?
Last Answer : Using PV=nRT, 10.0ºC = 283.15ºK, R = 62.36 L torr/mol KV= (nRT)/PV = (2.35m*(62.36 L torr/mol K)*283.15ºK)/766.7 TorrV = 54.12 L
Description : A sample of grapefruit juice at 25 degrees Celsius has a hydronium concentration of 1.78 X 10-3 molar. What is the pH of the solution? w) 2.22 x) 2.75 y) 3.25 z) 6.33
Last Answer : ANSWER: X -- 2.75
Description : Rationalise the denominator in each of the following and hence evaluate by taking √2 = 1.414, √3 = 1.732 and √5 = 2.236 up to three places of decimal. -Maths 9th
Last Answer : Rationalisation of denominator
Description : If `sqrt(2)=1.414, sqrt(3)=1.732` and `sqrt(5)=2.236`, find the values of the following. (i) `sqrt(98)` (ii) `sqrt(300)` (iii) `sqrt(128)+sqrt(48)` (i
Last Answer : If `sqrt(2)=1.414, sqrt(3)=1.732` and `sqrt(5)=2.236`, find the values of the following. (i) ` ... `sqrt(128)+sqrt(48)` (iv) `2sqrt(75)-3sqrt(12)`
Description : What is 414 divided by 77?
Last Answer : 5.3766
Description : What is the greatest number that divides 364 414 and 539 with the same remainder in each case?
Last Answer : The number is 25.
Description : What is 47.414 rounded to the nearest tenth?
Last Answer : It is then 47.4 to the nearest tenth
Description : The magnitude of the conduction current density for a magnetic field intensity of a vector yi + zj + xk will be a) 1.414 b) 1.732 c) -1.414 d) -1.732
Last Answer : b) 1.732
Description : What would happen if we replaced 20% of our atmosphere's nitrogen with neon?
Last Answer : I would be like “Whoa!”
Description : which of the following gases is not a significant ingredient of the jovian planet atmospheres? -General Knowledge
Last Answer : Carbon dioxide is important in the terrestrial planet atmospheres, but not in the jovian planet atmospheres.
Description : Why have the Jovian planets retained their atmospheres?
Last Answer : Simply because the gas giants are so big that the force ofgravity is sufficient to retain the light gases.
Description : Which of the statements to about the Troposphere is not true? A. It contains 85-90% of the atmosphere’s mass B. It contains nearly all the water and oxygen of the atmosphere C. It is the zone which exhibits changes in condition of weather D. It is about 350 km thick (Answer)
Last Answer : D. It is about 350 km thick (Answer)
Description : To what does the atmosphere's "greenhouse effect" refer to? w) the fact that ozone reflects ultraviolet radiation x) the fact that air prevents heat from leaving the earth y) the fact that clouds prevent sunlight from reaching the earth z) the fact that green plants use sunlight to produce food
Last Answer : ANSWER: X -- THE FACT THAT AIR PREVENTS HEAT FROM LEAVING THE EARTH
Description : What would be the volume, in liters, of 11 grams of CO2 at standard temperature and pressure?
Last Answer : ANSWER: 5.6 LITERS
Description : The average kinetic energy of the molecules of an ideal gas is directly proportional to – (1) Velocity of Molecules (2) Mass of Molecules (3) Absolute temperature of the gas (4) Temperature of environment
Last Answer : (3) Absolute temperature of the gas Explanation: The average kinetic energy of gas molecules is directly proportional to absolute temperature only. This implies that all molecular motion ceases if the temperature is reduced to absolute zero.
Description : Translational kinetic energy of molecules of an ideal gas is proportional to (where, T = absolute temperature of the gas) (A) T (B) √T (C) T2 (D) 1/√T
Last Answer : (A) T
Description : The volume of a gas is directly proportional to the number of molecules of the gas. a. Ideal gas law b. Boyle-Mariotte Law c. Avogadro’s Hypothesis d. Gay-Lussac’s Law of combining Volumes
Last Answer : Avogadro’s Hypothesis
Description : If the Kelvin temperature of an ideal gas is doubled, what happens to the rms speed of the molecules in the gas? a. it increases by a factor of square root of 2 b. it increases by a factor of 2 c. it increases by factor of 4 d. none of the above
Last Answer : it increases by a factor of square root of 2
Description : Which of the following statements is TRUE for an ideal gas, but not for a real gas? A. PV = nRT B. An increase in temperature causes an increase in the kinetic energy of the gas C. The ... same as the volume of the gas as a whole D. No attractive forces exists between the molecule of a gas
Last Answer : PV = nRT
Description : The average kinetic energy of the molecules of an ideal gas is directly proportional to (1) Velocity of Molecules (2) Mass of Molecules (3) Absolute temperature of the gas (4) Temperature of environment
Last Answer : Absolute temperature of the gas
Description : A cylinder contains oxygen at a pressure of 10 atm and a temperature of 300 K. The volume of the cylinder is 10 liters. What is the mass of the oxygen in grams? Molecular weight (MW) of oxygen is 32 g/mole? a. 125.02 b. 130.08 c. 135.05 d. 120.04
Last Answer : 130.08 {(10atm)(10)(32)/(0.0821) (300K)}
Description : What force between molecules tends to cause most common gases to behave as non-ideal gases? w) Van der Waals' force x) ionic bonding force y) gravitational force z) covalent bonding force
Last Answer : ANSWER: W -- VAN DER WAALS' FORCE
Description : A sample of NO experiences a change in pressure from 0.5734 atm to 5.1663 atm. If its new volume is 89.811 L, what was its original volume in liters ____ L?
Last Answer : 809.2(Explanation): boyle's law of PV=PV for this problem. Plug in values we know, (the pressures and new volume) to get 0.5734V=(5.1663)(89.811). Now solve for V by dividing by 0.5734 on both sides. You get 809.1917846. Round to 4 sig figs to get 809.2.
Description : Heating 235 g of water from 22.6 degrees C to 94.4 degrees C in a microwave oven requires 7.06x10^4 J of energy. If the microwave frequency is 2.88x10^10 Hz, how many quanta are required to supply the 7.06x10^4 J?
Last Answer : answer:Guidelines. I don’t mean to be the bearer of bad news…
Description : What is the volume in liters of 0.75 mol of methane gas (CH4)?
Last Answer : The volume is 17 L.
Description : Calculate the number of molecules of methane in 0.50 m^3 of the gas at a pressure of 2.0 × 10^2 kPa and a temperature of exactly 300 K.
Last Answer : Calculate the number of molecules of methane in 0.50 m3 of the gas at a pressure of 2.0 × 102 kPa and a temperature of exactly 300 K.
Description : How to fix body health fast ? I am currently 20 years old , height 5 feet 6 inches and I weigh 49 kg and BMI 18.00 . When I was at home, 0.5 liters per day. I used to eat cow's milk but after ... to buy. How can I gain 10 kg weight in 3 months ?? Looking for the right advice to fix my health ???
Last Answer : It is not possible to gain weight fast. It will take some time to get fat or weight. Usually if you are a little fat you will gain weight. So I am not giving any separate tips for weight gain. You ... weight. Food: Drink vegetables , small fish , meat , eggs , milk , banana and water after a while.
Description : What would have the effect on the gas pressure if collisions between the gas molecules are not elastic?
Last Answer : Ans. The gas pressure would gradually become zero as molecules will gradually slow down and ultimately settle down due to constant loss of energy.
Description : A sample of gas has a volume of 210 cubic centimeters at a temperature of 250 degrees Kelvin. The temperature is raised to 500 degrees Kelvin while the pressure remains unchanged. What is the new volume of the gas.
Last Answer : ANSWER: 420 CUBIC CENTIMETERS