Answer: 
Explanation:
Given
Mass of water in the sample is 
Temperature changes from 
to 
Change in temperature is 
We know, specific heat of water is 
Heat absorbed is given by
Thus, water absorbs of heat from hot plate.
Explanation:
To solve this question, we need to use the following formula:
M = n/V
So:
M = ??
n = 2.634 mol
V = 25.2 L
M = 2.634/25.2
M = 0.105 mol/L
Answer: a. 0.105
A is your answer, "the concentration of an unknown acid based upon the concentration of a known base"
Answer:
The atmosphere acts like a multi-layer shield that protects Earth from dangerous solar radiation. ... The stratospheric ozone layer absorbs ultraviolet (UV) radiation, preventing dangerous UV rays from hitting Earth's surface and harming living organisms. (Just look it up)
Explanation:
I hope this helps!
Answer is: empirical formula of the product is Br₂O₅.
Chemical reaction: x/2Br₂ + y/3O₃ → BrₓOy.
m(Br₂) = 1,250 g.
m(BrₓOy) = 1,876 g.
n(Br₂) = m(Br₂) ÷ M(Br₂).
n(Br₂) = 1,25 g ÷ 159,81 g/mol.
n(Br₂) = 0,0078 mol.
n(Br) = 2 · 0,0078 mol = 0,0156 mol.
m(O₃) = 1,876 g - 1,25 g = 0,626 g.
n(O₃) = 0,626 g ÷ 48 g/mol = 0,013 mol.
n(O) = 0,039 · 3 = 0,039 mol
n(Br) : n(O) = 0,0156 mol : 0,039 mol.
n(Br) : n(O) = 1 : 2,5.
