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marta [7]
3 years ago
15

If you want to stop the the current flow through device 3 in the circuit shown above which one of the following single switches

should you open

Chemistry
1 answer:
Amiraneli [1.4K]3 years ago
4 0
Switch s5. This will stopt the current flow of all the circuit.
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What amount of heat will raise the temperature of 78g liquid water from 20 C to 80 C?
DaniilM [7]

Answer:

19656J

Explanation:

Step 1:

Data obtained from the question.

Mass (M) = 78g

Initial temperature (T1) = 20°C

Final temperature (T2) = 80°C

Change in temperature (ΔT) = T2 – T1 =

80°C – 20°C = 60°C

Specific heat capacity (C) = 4.2J/g°C

Heat (Q) =...?

Step 2:

Determination of the heat required for the reaction.

Q = MCΔT

Q = 78 x 4.2 x 60

Q = 19656J

Therefore, 19656J of heat is required.

3 0
3 years ago
What is 25 milliliters in cubic centimeters
lubasha [3.4K]

1cc (cubic centimeter) and 1mL (milliliter) are the same volume. So, 25mL = 25cc

3 0
3 years ago
Which of the following will stay constant, no matter if the substance is in the solid, liquid, or gas state?
34kurt
The mass of any substance will remain the same regardless of its state of matter. Using water as an example, its volume increases when it is boiled to a gas or when it is frozen from a liquid state to the solid state ice. The volume and temperature will change as it moves through the states of matter, however the amount of individual molecules of oxygen and hydrogen that form water will remain the same and this constitute mass. 
3 0
3 years ago
Which of the following pairs of compounds have the same empirical formula?
andreyandreev [35.5K]

Answer:

option a and c both are correct

Explanation:

please mark me as brainliest

6 0
2 years ago
S-2-iodooctane lost his opticaly activity in soln on tratment wwithNaI. Explain
IceJOKER [234]

Answer:

Repeated SN2 reactions occur leading to the formation of a racemic mixture

Explanation:

S-2-iodooctane is a chiral alkyl halide with an asymmetric carbon atom. The presence of an asymmetric carbon atom implies that it can rotate plane polarized light and thus lead to optical isomerism. The two configurations of the compound are R/S according to the Cahn-Prelong-Ingold system.

However, when S-2-iodooctane is treated with sodium iodide in acetone, repeated SN2 reactions occur since the iodide ion is both a good nucleophile and a good leaving group. Hence a racemic modification is formed in the system with time hence we end up with (±)- Iodooctane.

5 0
3 years ago
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