Heat of vaporization is the heat required to vaporize unit mass of a substance at it's boiling point. The heat of vaporization or condensation of water is 2257 J/g.
It means that 1 g of water involves 2257 J energy during condensation or vaporization at its boiling point (100 C)
Given mass of water vapor that is condensing = 11.2 g
Calculating the heat released when 11.2 g of water vapor condenses in to liquid water at 100
:
Rounding the final answer 25,278 J to three significant figures we get, 25,300 J
Therefore the correct answer is E. 25,300 J
Answer
B salt this is beacause salt is made of monomers
It’s C I hope this was useful and have a great day!
Answer:
Diatomic molecules are molecules composed of only two atoms, of the same or different chemical elements. The prefix di- is of Greek origin, meaning "two
Explanation:
Answer:
<em><u>Mass of Ni = 4.14 grams</u></em>
Explanation:
Molar mass : It is the amount of substance present in 1 mole of the molecules.
Moles : It is the quantity that contains as many atoms as present in 12 gram of C-12. This is equal to Avogadro Number .
Molar mass of Ni = 58.69 g/mole
Moles can be calculated by two formula:
........(1)
And ,
.........(2)
Comparing equation 1 and 2
M = 58.69 g/mole
Put these value in the formula and solve for m
m = 4.14 gram
<em><u>Mass of Ni = 4.14 grams</u></em>
<em><u>Second Approach :</u></em>
Find the moles first using :
Then put value of n in the formula(1) and solve for m
........(1)
