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stealth61 [152]
3 years ago
5

Which of the substances in the chemical equation is a pure substance?

Chemistry
2 answers:
Anni [7]3 years ago
7 0

Answer:

D. all of these

Explanation:

GarryVolchara [31]3 years ago
7 0
The answer is D. All of these. Hope this helps. You're welcome sis
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In a
dsp73

Answer:

1384 kJ/mol

Explanation:

The heat absorbed by the calorimeter is equal to the heat released due to the combustion of the organic compound. C is the total heat capacity of the calorimeter and Δt is the change in temperature from intial to final:

Q = CΔt = (3576 J°C⁻¹)(30.589°C - 25.000°C) = 19986.264 J

Extra significant figures are kept to avoid round-off errors.

We then calculate the moles of the organic compound:

(0.6654 g)(mol/46.07) = 0.0144432 mol

We then calculate the heat released per mole and convert to the proper units. (The conversion between kJ and J is infinitely precise and is not involved in the consideration of significant figures)

(19986.264 J)(1kJ/1000J) / (0.0144432 mol) = 1384 kJ/mol

8 0
3 years ago
Heating devices can be made by passing an electric current through a conductor of:
olchik [2.2K]

Answer:

High resistance

Low conductivity

Explanation:

The more resistance (aka less conductivity) there is, the more the energy is turned into heat than simply  passing through the object.

6 0
3 years ago
1. If you run into a curb on a skateboard, you will fall forward off your skateboard because
uysha [10]

Answer:

D)applied

Explanation:

4 0
3 years ago
Read 2 more answers
FREE BRAINLIST NEED HELP ASAP
mixas84 [53]
Sulfur.
there’s no neutrons and 16 protons
7 0
3 years ago
The equation for the chemical reaction shown below is not balanced. What number should replace the question mark to balance this
malfutka [58]
B. the number 3.
there are 2Al's on both sides and 6 Cl's on the right side so to balance it, you multiply Cl2 by 3 to get 6 Cl's.
6 0
3 years ago
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