produced from the reaction.
The overall balanced equation for the reaction is,
So, the number of molecules produced in the reaction of
produced from the reaction.
reaction.
are produced in the reaction.
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Answer:
26.981539 u
Explanation:
One mole of Al atoms has a mass in grams that is numerically equivalent to the atomic mass of aluminum. The periodic table shows that the atomic mass (rounded to two decimal points) of Al is 26.98, so 1 mol of Al atoms has a mass of 26.98 g.
Answer:
ΔH = -55.73 kJ/mol
Explanation:
Since the density of water is 1 g/ml and the problem wants us to use this value to find the mass of NaOH and HNO3 we arrange the original equation of
Since no heat was lost or gained
qrxn+qsoln=0. ----> qrxn=-qsoln.
qsol = mc*()
The mass of the solution is the mass of NaOh and HNO3. 100+100= 200.
You plug in the remaining numbers using 4.18 as the heat capacity and 2 as the change in temperature:
qsol=200*(4.18)*(2)= 1672 J
qrxn= -1672 J
Now ΔH = qrxn over the amount in moles or grams. This problem asks for NaOH in moles. To calculate this we use the concentration formula
M= . -----> n=V*M.
Note that you must convert 100 ml to L to use this equation. So we have
n=0.1*0.300 where n=0.03
ΔH =
ΔH = -55733.3 J/mol
ΔH = -55.73 kJ/mol
A-Locations M and O are at the poles.
Explanation:
Locations M and O are located at the poles because they receive sunlight that is spread out over a large surface area. The poles receive sunlight at an angle to the surface and it causes the rays of the sun to spread out in all direction.
- At the equator, sunlight impinges directly on the surface and the solar radiation here is very much.
- It is important to know that the sun is overhead directly at the equator.
- The earth is tilted at an angle to sun and therefore, areas around the polar region will receive sunlight that is spread out in different directions over a large area.
- Away from the pole, the equator is directly facing the sun and it receives direct sunlight.
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