According to the following reaction,_______ moles of P406 form when 4 moles of P4 react with 6 moles of 02.
P4(s) + 302(g) --> P4O6(s)
What is 2 moles
100
This temperature in Kelvin would be necessary to keep a balloon that contains 0.220 moles of He gas at a volume of 8.30 L and a pressure of 851 mm Hg.
What is 515 K.
100
_______ out of the following compounds is predicted to thave the highest vapor pressure.
NaCl,
CH3OH,
CS2,
SO2,
NH3
What is CS2
100
This/these gas samples would have the largest volume if they were all at the same temperature and pressure.
1.0 mole of He,
1.0 mole of N2,
1.0 mole of CH4,
1.0 mole of C2H6.
What is they'd all have the same volume under these conditions.
100
Out of the following molecules, _____ has the weakest intermolecular forces.
CF4,
CCl3H,
Br2,
CH3OH,
NF3.
What is CF4
200
This many iron atoms form when 3.44 g of aluminum reacts according to the following balanced reaction.
3FeO(s) + 2Al(l) --> 3Fe(l) + Al2O3 (s)
What is 1.15 x 10 E23
200
This is the final temperature in Kelvin of a gas sample when it contracts (shrinks) to a volume of 23.6 L from a volume of 32.9 L at 377 K.
What is 270 K.
200
Out of the following pairs of substances listed below, _____ is listed with the compound containing the strongest intermolecular forces first.
HCl and HF,
CO2 and SO2,
PH3 and NH3,
CCl2H2 and CF4
What is CCl2H2 and CF4
200
If the temperature(absolute, Kelvin scale) of a gas sample is _______, the volume doubles.
What is doubled.
200
_____ is the percent yielf of a reaction that produces 19.5 g of CO2 from 29.8 g of Fe2O3(and excess CO).
Fe2O3(s) + 3CO(g) --> 2Fe(s) + 3CO2(g)
What is 79.2%
300
This many moles of oxygen are formed when 4.59 moles of KO2 are reacted with 26.7 g of water according to the balanced reaction below.
4KO2(s)+ 2H20(l) --> 3O2(g) + 4KOH(s)
What is 2.22 moles of O2
300
This is the pressure of a gas mixture composed of 5.00 moels of H2 and 20.18 g of Ne at standard temperature in a 20.0 L container.
What is 6.72 atm.
300
Only one of the following statements is true. That statement is __________.
1)It is possible to boil water @ room temp at a very high pressure.
2)The process of vaporization is an exothermic process.
3)Ionic compounds have very low melting points compared to covalent compounds.
4) Covalent compounds with high boiling points have strong intermolecular forces.
What is covalent compounds with high boiling points have strong intermolecular forces.
300
______ out of the following compounds is the only one to exhibit dipole-diple forces.
Cl2,
CH2F2,
CH4,
CO2.
What is CH2F2
300
According to the following balanced reaction, this volume (in L) of NH3(at 425 K and 1.7 atm) is required to form 22.1 g of H20.
CO2(g) + 2NH3(g) --> CO(NH2)2(s) + H2O(g)
What is 50.3 L
400
This many moles of B2H6 are needed to react exactly with 1.89 moles of O2.
B2H6(g)+3O2(l) --> 2HBO2(g) + 2H2O(l)
What is 0.630 moles of B2H6
400
Out of the following gas samples,_______ would have the lowest pressure if they are each places in separate 10.0 L containers at standard temperature.
4.0 g He
20.2 g Ne
20.2g CO2
70.9 g Cl2
What is 20.2 g CO2
400
This/these types of intermolecular forces of the following are present in NF2Br.
Dispersion,
Dipole-dipole,
hydrogen bonding.
What is dispersion and dipole-dipole
400
______ is the correct order of the following according to decreasing vapor pressure.
NH4NO3 , I2 , F2 , SCL2.
What is F2>I2>SCl2>NH4NO3
400
The remaining gas (at 358 K) exerts _____ pressure(in atm) if 46.3 grams of H2S are mixed with 31.6 g of SO2 in a 3.65 L sealed container according to the following reaction.
2H2S(g) + SO2(g) --> 3S (s) + 2H2O(l)
What is 3.00 atm
500
This much N2(in g) is formed from reacting 54.4 g of NH3 with 58.9 g of O2 according to the following balanced reaction.
4 NH3(g) + 3O2(g)--> 2N2(g)+ 6H2O(g)
What is 34.4 g N2
500
This pressure is exerted by a gas mixture of 8.9 g He and 23.2 g Ar in a 3.9 L container at 185 degrees C.
What is 27 atm.
500
Out of the following substances, ______ would become a liquid FIRST as the temperature of the samples is decreased.
CS2,
CF4,
CH3OH,
F2,
He.
What is CH3OH
500
In respect to decreasing boiling point, the following are placed in _______ order.
KI, He, CS2 , NCl3.
What is KI>NCl3>CS2>He
500
According to the following reaction, ______ moles of H2SO4 would be needed to dissolve a 19.8 g piece of aluminum jewelery.
2Al(s) + 3H2SO4(aq) --> Al2(SO4)3 (aq) + 3H2 (g)