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mafiozo [28]
3 years ago
9

A laboratory bottle of helium gas occupies a volume of 2.0 L at 760 mm Hg. Calculate the new pressure if the volume falls to 1.8

L.
Chemistry
1 answer:
irina1246 [14]3 years ago
6 0

Answer: 844 mm Hg

Explanation:

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Which transfer of heat is depicted in the figure?
Eddi Din [679]

Answer:

Oh it is convention

Explanation:

because the heat transfer is through fluids

8 0
3 years ago
How many moles of co2 are produced when 5.40 mol of ethane are burned in an excess of oxygen?
Nimfa-mama [501]
<span>Reaction of ethane combustion:

2C2H6 (g) + 7O2 (g) ----> 4CO2 (g) + 6H2O 

According to the reaction, we can see that </span>C2H6 and CO2 have following stoichiometric ratio: 

n(C2H6) : n(CO2) = 2 : 4

If we know the number of moles of ethane we can calculate moles of carbon dioxide:

2 x n(CO2) = 4 x n(C2H6)

n(CO2) = 2 x n(C2H6)

n(CO2) = 2 x 5.4 = 10.8 mole of CO2 <span>are produced</span>


3 0
4 years ago
5 of 7 What percentage of a material will persist after 80 minutes if it's half life is 20 minutes?​
malfutka [58]

Answer:

50

Explanation:

6 0
3 years ago
What does it mean when a reaction has a negative amount of Kj
makvit [3.9K]

Answer:

heat is released in going from reactants to products

Explanation:

hope this helps

3 0
3 years ago
Which type of reaction is the Haber process: N2(g) + 3 H2(g) → 2 NH3(g) + heat? *
Alik [6]

Answer:

exothermic, with a decrease in entropy

Explanation:

Whenever you produce heat as a product in a reaction, the reaction is exothermic. To determine entropy, we know we have 4 moles of gas on reactant (1 from N2 and 3 from H2) and in produce side we only have two moles (2 from NH3) thus since we are decreasing the number of gas molecules, there is going to be less disorder, hence decrease in entropy.

8 0
3 years ago
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