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V125BC [204]
2 years ago
14

When someone pours milk into this life what is the the role of the coffee

Chemistry
2 answers:
azamat2 years ago
8 0
B solvent because it is socking in
stiv31 [10]2 years ago
5 0
The answer you are looking for is B I agree
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Describe the energy in coal and the way in which it’s converted to electrical energy. Write 50 to 100 words.
devlian [24]

Answer:

Coal contains chemical potential energy

Explanation:

Chemical species are known to contain chemical energy. Chemical energy is contained in chemical bonds in a chemical substance.

Since energy can neither be created nor destroyed, energy contained in chemical bonds can be transformed from one form to another. Coal contains chemical energy.

One of the ways of generating electricity is the combination of fossil fuels. This involves the conversion of chemical energy to heat energy. The steam produced is used to turn a turbine. The turning off the turbine implies a conversion of heat to mechanical energy. The turning of the turbine now produces electrical energy.

4 0
2 years ago
Consider the reaction between hydrazine and hydrogen to produce ammonia, N2H4(g)+H2(g)→2NH3(g). Use enthalpies of formation and
kupik [55]

Answer:

The enthalpy of the nitrogen-nitrogen bond in N2H4 is 162.6 kJ

Explanation:

For the reaction: N2H4(g)+H2(g)→2NH3(g), the enthalpy change of reaction is

ΔH rxn = 2 ΔHºf NH3 - ΔHºf N2H4

but we also know that the ΔH rxn is calculated by accounting   the sum of number of bonds formed and bonds broken as follows:

ΔH rxn = 6H (N-H) + 4 (N-H) + 2H (H-H)  

where H is the bond enthalpy .When bonds are broken H is positive, and negative when formed,  in the product there are 6 N-H bonds , and in the reactants 4 N-H and 1 H-H bonds).

Consulting an appropiate reference handbook or table the following values are used:

ΔHºf (NH3) = -46 kJ/mol

ΔHºf (N2H4) = 95.94 kJ/mol

(The enthalpy of fomation of hydrogen in its standard state is zero)

H (N-H) = 391 kJ

H (H-H) = 432 kJ

H (N-N) = ?

So plugging our values:

ΔH rxn =  2mol ( -46.0 kJ/mol) - 1mol(95.4 kJ/mol) = -187.40 kJ

-187.40 kJ = 6(-391 kJ) + 4 (391 kJ) + 432 +  H(N-N)

-187.40 kJ = -350 kJ + H(N-N)

H(N-N) = 162.6 kJ

7 0
3 years ago
What are the five major types of celestial bodies in the solar system
kirill115 [55]

Answer:

the Sun, planets, satellites, comets, asteroids and meteoroids.

Explanation:

hope it helps :)

4 0
2 years ago
Which is a set of valid quantum numbers?
harina [27]
2,2,1,1/2 -- NOT (l too high)
3,2,1,1/2 -- Valid
2,1,-1,1/2 -- Valid
3,3,-2,-1/2 -- NOT (l too high)
1,-1,-1,-1/2 -- NOT (l too low)
4,3,3,-1/2 -- Valid
1,1,0,1/2 -- NOT (l too high)
0,2,1,1/2 -- NOT (no such thing as n = 0, l too high)
2,0,0,-1/2 -- Valid
1,0,0,1/2 -- Valid
3,2,1,0 -- NOT (cannot have ms = 0)
4,3,4,-1/2 -- NOT (ml too high)

6 0
3 years ago
Read 2 more answers
A mountainous region would be a likely source for nuclear or hydroelectric or wind energy
forsale [732]
Hydroelectric is the answer 
7 0
3 years ago
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