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iheartfood
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#1: At STP, how many molecules of nitrogen gas are in 22.4 L?
A. 6.022 × 10^22
B. 6.022 × 10^23
C. 6.022 × 10^24
D. 6.022 × 10^25
**my answer: B
is that right?? @aaronq :)
 one year ago
 one year ago
iheartfood Group Title
#1: At STP, how many molecules of nitrogen gas are in 22.4 L? A. 6.022 × 10^22 B. 6.022 × 10^23 C. 6.022 × 10^24 D. 6.022 × 10^25 **my answer: B is that right?? @aaronq :)
 one year ago
 one year ago

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iheartfood Group TitleBest ResponseYou've already chosen the best response.0
#2: Molar mass is the molecular (formula) mass of any substance expressed in which of the following? A. moles B. grams C. kilograms D. liters **my answer: A is that right?
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
molar mass is expressed in gram per mole
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
1 is right though
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
#3: Which of the following temperatures and pressures are used as standards for gases? A. 0°C, 1 atm B. 25°C, 1 atm C. 10°C, 1 atm D. 5°C, 2 atm **my answer; A or is it B?? ;/ idk im a bit conflicted :/
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
okay so what is #2 then? ;/
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
2 would be grams
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
mass = unit of weight measurement
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
ohhh okay!! :) #4: Which of the following is NOT a measure of the amount of matter? A. mole B. molar mass C. molar volume D. STP **my answer; D is that right?
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
STP, standard temperature and pressure ALWAYS 25 celsius and 1 atm (760 torr/mm Hg)
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
#5: Which of the following is equal to the number of particles in 18 grams of carbon12? A. 1.5 : 1 mole ratio B. 1.5 : 1 molar mass c. 1.5 moles D. 1 : 1.5 molar volume *my answer: B is that right? :/
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
wait so #3 is B. 25°C, 1 atm ??
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
yeah 3 is B. 5 is oddly worded, the only that makes sense is 1.5 moles because n=18g/12g/mol=1.5 moles
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
#6: Which of the following substances has a molar mass of 208 g? A. P2O5 B. BaCl2 C. AlCl3 D. MgCl2 **my answer; B is that right? :)
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
okay!! so #5 is what then?? :/
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
5 would be 1.5 moles, C.
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
6 is right (Y)
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
aweosme!! :) thx! #7: Who discovered the principle that equal volumes of gases at the same temperature and pressure contain the same number of particles? A. John Dalton B. Amedeo Avogadro C. Ernest Rutherford D. Jacques Charles *my answer: B is that right? :)
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
yep! my main man avogadro
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
#8: What is the volume of 1.5 moles of gas at STP? A. 9.02 L B. 20.0 L C. 33.6 L D. 22.4 L **my answer; C is that right??
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
LOL thats hilarious!!! :P
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
#9: You do an experiment in which you need 0.25 moles of tyrosine (C9H11NO3). How many grams must you weigh out? A. 45.3 g B. 90.5 g C. 181 g d. 272 g **my answer; A is that right? :)
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
9 is also correct
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
this one you might not get
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
#10: For an experiment, you need to dissolve 0.10 moles of NaCl in 1 liter of water. How much NaCl must you weigh out? A. 8.2 g B. 5.8 g C. 3.2 g D. 0.14 g **my answer: B to is it A?? :/
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
lol yeah i get it, cuz h202 is hydrogen peroxide, which is poisonous and would kill u haha my friend told me this b4 lol
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
hahaha wow, good stuff (Y)
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
#11: A doctor prescribes 1,500 mg of glucosamine (C6H13NO5) per day for a person with osteoarthritis. How many moles of glucosamine does the patient take each day? A. 8.38 B. 8.38 × 10^3 C. 0.12 D. 1.79 × 10^3 **my answer: B is that right? haha and yeah ikr?? :) so is #10 right?? is it B? or is it A? :/
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
10 is right, B
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
#12: In a chemical reaction, you collect 500 mL of hydrogen gas at STP. How many moles of hydrogen gas did you collect? A. 22 B. 0.22 C. 0.02 D. 0.004 **my answer; C is that right?? and yayy :)
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
#13: How many atoms are in 1.0 moles of xenon gas at STP? A. 2.2 × 10^23 B. 3.0 × 10^22 C. 3.0 × 10^24 D. 6.0 × 10^23 **idk this one :( do u get it?
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
11 is good!
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
#14: A chemical reaction produces oxygen gas. You collect 6.02 × 10^23 oxygen gas molecules at STP. What volume of oxygen gas did you collect? A. 2.8 L B. 5.6 L C. 11.2 L D. 22.4 L **my answer; D is that irhgt?? :)
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
for 13, you have to know that Xe(g) is not diatomic, so you know 1 mole = 6.022x10^23 atoms/molecules
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
14 is good also!
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
annnndd last one!!! (which unfortunately i do not understand :(.... ) #15: A chemical reaction produces 5.6 L of nitrous oxide gas (N2O) at STP. What is the mass of the gas produced? A. 0.25 g B. 5.6 g C. 11 g D. 44 g ***idk :(
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
so 13 would be D. 6.0 × 10^23 ??
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
lol that was a good one :P and that kitty is so cute with the glasses and stuff!! =)
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
yes 13 is D, noble gases are ALWAYS unimolecular. uni=1
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
awesome! :)what about 15 tho?? and i found a good one hahaha :P i like this one :)
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
so for 15, find how many moles you produced, 1 mole of gas at STP = 22.414 L so moles = 5.6/22.414 then use that to find the grams with the molar mass of N2O moles= mass/molarmass mass = moles*molarmass
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
HAHA I've never seen that one, i like it
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
so is #15 A. 0.25 g?? and i found a kinda continued one of one u posted above :) and hahaa yeahh i like that one :)
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
and this one :P
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
"ALL THESE CHEM JOKES ARE BORON ME" LOL
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
and i liked this one too :P
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
haha periodically
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
okay!! :) thanks!! :) and lol that ones good :) and heres another one.. but its with... the one and only!!! PAtrick... STar!!!!
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
oh wait i added up the molar mass of N2O wrong i did NO2
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
lol it's still 11 grams
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
okay!! haha thanks!! :D
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
:) no prob haha i haven't watched spongebob in like i don't even know, forever.
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
haha yeah same, but i love patrick!! :) i mean he lives in a rock.. how do u even find a hollowed out rock?? :) spongebob is awesome!! :)the best cartoon ever!! :) lol thanks again!! :D
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
it is so awesome, i liked the movie too! no problem at all!
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
yeah!! haha i watched it a while ago but all spongebob is good and funny :)
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
agreed :) i'm gonna go, see ya !
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
byebye! :D
 one year ago
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