If you use rate laws then your answer will be more supported. Laws can not change, so if you use rate laws then the student will get a more accurate answer then if they don’t use rate laws.
Explanation:
The given data is as follows.
Heat of vaporization (
) = 45.4 kJ/mol
Specific heat (
) = 0.903 
Let us assume the alcohol given is
and its mass is 1.12 g. Also, mass of aluminium block is 73.0 g.
First, calculate the moles of alcohol (
) as follows.
No. of moles alcohol = 
=
= 0.0186 mol
So, heat absorbed by the alcohol (
) = heat lost by aluminium (
)
= 

12.71 = 

Thus, we can conclude that the final temperature of the block is 12.3^{o}C[/tex].
Answer:
B. a type of carbohydrate
Explanation:
Sugar is a type of carbohydrate.
Hope it helped brainiest plz
Answer:
41 g
Explanation:
The equation of the reaction is;
Cr(NO3)3(aq)+Na3PO4(aq)=3NaNO3(s)+CrPO4(aq)
Number of moles of chromium nitrate = 37g/ 146.97 g/mol = 0.25 moles
1 mole of sodium phosphate reacts with 1 mole of chromium nitrate
x moles of sodium phosphate react as with 0.25 moles of chromium nitrate
x= 1 × 0.25/1
x= 0.25 moles
Mass of sodium phosphate = 0.25 moles × 163.94 g/mol
Mass of sodium phosphate = 41 g