Answer:
about 310ºC
Explanation:
The Moon is the natural satellite of the Earth.
The Moon orbits around the Earth in approximately 27 days, and its average distance from the Earth is about 380,000 km.
Moreover, the mass of the Moon is 
.
The Moon has no water on its surface and no atmosphere: due to the lack of atmosphere, heat coming from Solar radiation is not retained near the surface. Moreover, the Moon orbits around the Earth keeping one face always towards it, so every location on the Moon has 13 consecutive days of daylight followed by 13 days of darkness.
As a result, there is a large thermic excursion between the maximum and minimum temperature on the Moon. In particular, we have:
- Minimum temperature: -173 degrees Celsius
- Maximum temperature: +127 degrees Celsius
So this difference is about
So, about 310ºC.
Since the molecular weight of water is about 18 g/mol, you have about 1 mol of water. So, now we know that it takes approximately 46.2 kJ of heat energy to warm 18.02g of water from 25C to 100C and then to vaporize it into steam. Hopefully this helped!
Explanation:
Answer:
Explanation:
Step 1
The question is based on the concept of PH and pOH calculations.
pH is defined as negative logarithmic of hydronium Ion concentration.
while pOH is defined as negative logarithmic of hydroxide ion concentration of the solution.
Step 2
[H+] = 7.7*10-7 M
pH = -log[H+]
= -log ( 7.7*10-7 )
= 6.12
Step 3
pOH = 14 - pH
= 14 - 6.11
= 7.89
<span>Which reagent will be used up first? Thee answer is HCl.
We need to convert the amounts of the reactants into moles to see the limiting reactant.
48.2 g HCl ( 1 mol / 36.46 g) = 1.32 mol HCl
Since the ration is 1:4 then the limiting reactant is HCl. To react all of the MnO2 we need 3.44 mol HCl.
</span><span>How many grams of Cl2 will be produced?
</span>We use the amount of limiting reactant since it will be used up first.
1.32 mol HCl (1 mol Cl2 / 4 mol HCl) ( 70.9 g Cl2 / 1 mol Cl2) =23.4 g CL2
Quarter moon is the correct answer
