Answer:
<u>✌</u><u>3</u><u> </u><u>I</u><u> </u><u>think</u><u> </u><u>-</u><u> </u><u>She</u><u> </u><u>should</u><u> </u><u>not</u><u> </u><u>have</u><u> </u><u>multiplied</u><u> </u><u>the</u><u> </u><u>hydrogen</u><u> </u><u>atoms</u><u> </u><u>by</u><u> </u><u>the</u><u> </u><u>coefficient</u><u>. </u><u> </u><u>sorry</u><u> </u><u>im</u><u> </u><u>not</u><u> </u><u>sure</u><u> </u><u>but</u><u> </u><u>I</u><u> </u><u>tried</u><u> </u><u>tell</u><u>,</u><u> </u><u>tell</u><u> </u><u>me</u><u> </u><u>if</u><u> </u><u>im</u><u> </u><u>wrong</u><u> </u><u>Plz</u><u>!</u><u>✌</u>
Explanation:
<em>❤</em><em>So</em><em> </em><em>sorry</em><em> </em><em>if</em><em> </em><em>it's</em><em> </em><em>wrong</em><em>. </em><em>❤</em>
Since the temperature is constant, therefore, this problem can be solved based on Boyle's law.
Boyle's law states that: " At constant temperature, the pressure of a certain mass of gas is inversely proportional to its pressure".
This can be written as:
P1V1 = P2V2
where:
P1 is the initial pressure = 1 atm
V1 is the initial volume = 3.6 liters
P2 is the final pressure = 2.5 atm
V2 is the final volume that we need to calculate
Substitute with the givens in the above mentioned equation to get the final volume as follows:
P2V1 = P2V2
1(3.6) = 2.5V2
3.6 = 2.5V2
V2 = 3.6 / 2.5 = 1.44 liters
Answer: All of the statements are true.
Explanation:
(a) Considering the system mentioned in the equation:-
The sum of total moles in the flask will always be equal to 1 which leads to confirmation of this statement as for 60 secs= 0.16 mol A and 0.84 mol B
(b) 0<t< 20s, mole A got reduced from 1 mole to 0.54 moles while at 40s to 60s A got decreased from 0.30 moles to 0.16 moles.
0 to 20s is 0.46 (1 - 0.54 = 0.46)mol whereas,
40 to 60s is 0.14 (0.30-.16 = 0.14) mol
(0.46 > 0.14) mol leading this statement to be true as well.
(c) Average rate from t1 = 40 to t2 = 60 s is given by:
which is true as well
Answer:
ΔH = -976.5 kJ
Explanation:
For the reaction given, there are 2 moles of benzene (C6H6). The heat of this reaction is -6278 kJ, which means that the combustion of 2 moles of benzene will lose 6278 kJ of heat. It is an exothermic reaction.
The value of ΔH, the enthalpy, is a way of measurement of the heat, and it depends on the quantity of the matter (number of moles).
So, 24.3 g of benzene has :
n = mass/ molar mass
n = 24.3/78.11
n = 0.311 moles
2 moles ------------ -6278 kJ
0.311 moles ----------- x
By a simple direct three rule:
2x = -1953.08
x = -976.5 kJ
Answer:
D
Explanation:
The electrons revolve around the nucleus and they contain negative charge