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Nana76 [90]
2 years ago
13

What effects can occur when heat energy is added to a system? Select all that apply. a. increase in temperature

Chemistry
2 answers:
zalisa [80]2 years ago
7 0
<span>a. increase in temperature 
</span><span>d. phase change

Hope this helps!</span>
Lady_Fox [76]2 years ago
5 0

the answers are A, C, D

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How many moles of KCLO4 can be produced with 3.45 moles of NaCl. Assume all other reactants are in excess
ycow [4]
NOTE question is incorrect: The question should be:
<span>How many moles of KCLO4 can be produced with 3.45 moles of KCl. Assume all other reactants are in excess.
.......................................................................................................................

The reaction involving formation of KClO4 is 

NaClO4      +       KCl     </span>→    KClO4       +       NaCl

From above reaction, it can be seen that 1 mole of NaClO4 reacts with 1 mole of KCl to generate 1 mole of KClO4

Thus, if all other reactant are in excess, 3.45 moles of KCl  will react with 3.45 moles of NaClO4 to form 3.45 moles of KClO4.
4 0
3 years ago
An ion of iron has an 26 protons, 30 neutrons, and 23 electrons. What are its atomic number, atomic mass, and net charge?
kirill [66]
The answer to ur question corresponds to the information u provided in option A.
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6 0
3 years ago
Read 2 more answers
A 136 g sample of an unknown substance was heated from 20.0 °C to 40.0 °C. In the process the substance absorbed 2440 J of energ
Julli [10]

Answer:

Option A. The specific heat is 0.897 J/gºC, The Substance is aluminum.

Explanation:

We'll begin by calculating the change in temperature of the substance. This can be obtained as follow:

Initial temperature (T₁) = 20.0 °C

Final temperature (T₂) = 40.0 °C

Change in temperature (ΔT) =?

ΔT = T₂ – T₁

ΔT = 40 – 20

ΔT = 20 °C

Finally, we shall determine the specific heat capacity of the substance. This can be obtained as follow:

Mass (M) = 136 g

Change in temperature (ΔT) = 20 °C

Heat (Q) absorbed = 2440 J

Specific heat capacity (C) =?

Q = MCΔT

2440 = 136 × C × 20

2440 = 2720 × C

Divide both side by 2720

C = 2440 / 2720

C = 0.897 J/gºC

Comparing the specific heat capacity (i.e 0.897 J/gºC) of the substance with those in the table above, the substance is Aluminum.

Thus, option A gives the correct answer to the question.

4 0
3 years ago
In a solution at 25 degrees Celsius the H is 3.5 x 10^-6 M. What is the OH
antiseptic1488 [7]

Answer:

Explanation:

 [ H⁺] = 3.5 x 10⁻⁶ M .

[ H⁺] [ OH⁻] = 10⁻¹⁴

[ OH⁻] x 3.5 x 10⁻⁶ = 10⁻¹⁴

[ OH⁻] = 2.857 x 10⁻⁹ M .

4 0
3 years ago
What is the mass of a single atom, which is approximately equal to the total mass of the protons and neutrons in an atom called?
Lostsunrise [7]

Answer:

Mass number or relative atomic mass number.

6 0
2 years ago
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