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a_sh-v [17]
3 years ago
14

What is the overall reaction order for this rate law: rate = k[A]2[B][C]?

Chemistry
1 answer:
Kay [80]3 years ago
7 0

Explanation:

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If 200 grams of water is to be heated from 24.0oC to 100.0oC to make a cup of tea, how much heat must be added?
aksik [14]
According to this formula:

Q = M*C*ΔT 

when we have M ( the mass of water) = 200 g 

and C ( specific heat capacity ) of water = 4.18 J/gC

ΔT (the difference in temperature) = Tf - Ti 
     
                                                          = 100 - 24

                                                          = 76°C

So by substitution:


Q = 200 g * 4.18 J/gC * 76 °C

   = 63536 J 

 ∴ the amount of heat which be added and absorbed to raise the temp from 24°C to 100°C is = 63536 J


3 0
3 years ago
5. As a sample of matter is heated, its particles *
Sergeeva-Olga [200]

Answer:

B. move more quickly

Explanation:

As a sample of matter is heated, we know that the particles begins to move more quickly.

This is because the temperature of a substance is directly proportional to the average kinetic energy of a system.

  • As the temperature increases, the body gains more kinetic energy
  • This is translated to the particles of the medium.
  • Then they begin to move quickly and very fast enough.
3 0
3 years ago
Which salt contains an ion that forms a colored solution?
Orlov [11]
<span>Ni(NO₃)₂ - salt that forms a colored solution</span>
8 0
2 years ago
Which correctly summarizes the trend in electron affinity?
ra1l [238]

The answer is it tends to be more negative down a group. This is because as you go down the periodic table, the elements have more electron shells in their atoms. This makes the outermost shells less attracted to the nucleus due to their greater distances from the nucleus. Therefore, these shells are less likely to attract electrons (hence lower electron affinity) and are even more likely to lose electrons from their outer electron orbits.

4 0
3 years ago
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Calculate the mass percentage of H3PO4​
Natali5045456 [20]

Answer: phosphoric acid, H3PO4 (gives pop a tart taste)

% O: 1 mol H3PO4 (4 mol O / 1 mol H3PO4) (16 g / 1 mol O) = (64 g O / 98 g H3PO4) x 100 = 65.3%

% P: 1 mol H3PO4 (1 mol P / 1 mol H3PO4) (31 g / 1 mol P) = (31 g P / 98 g H3PO4) x 100 = 31.6%

3 0
2 years ago
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