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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 does gravity mapping show?
Sati [7]
The Answer is C . The differences in the magnetic force from place to place .
5 0
3 years ago
Read 2 more answers
What is the oxidation state for the oxygen atom in na 2 ​ o 2 ​ ?
elixir [45]
Na_{2}O_{2}

Na in compounds has oxidation number +1 only.

So,  Na_{2}^{+1}O_{2}^{x}

2*(+1)+2x=0, x=-1.

Oxidation number oxygen in Na_{2}O_{2} is - 1.
4 0
2 years ago
20g of water at 30°C was mixed with 40g of water at 75°C. What is
Kipish [7]

Answer:

The temperature of the mixture is 60°C

Explanation:

We can write the energy of water as follows:

E = m×C×T

<em>Where E is energy in Joules, m is mass of water, C is specific heat of water = 4.184J/g°C and T is temperature</em>

<em />

Replacing fot both samples:

E = 20g×4.184J/g°C×30°C

E = 2510.4J

E = 40g×4.184J/g°C×75°C

E = 12552J

The total energy of the mixture is 12552J + 2510.4J = 15062.4J

Mass = 60g:

15062.4J = 60g×4.184J/g°C×T

60°C = T

<h3>The temperature of the mixture is 60°C</h3>

4 0
3 years ago
Help please i have 5 minutes to do this !!!
kramer

Answer:

A) One that occurs on its own

4 0
2 years ago
If the NaOH is added to 35.0 mL of 0.167 M Cu(NO3)2 and the precipitate isolated by filtration, what is the theoretical yield of
Ghella [55]

Answer:

The correct answer is - 0.570 grams

Explanation:

The balanced chemical reaction is given by

Cu(NO3)2(aq)     + 2NaOH(aq)    -------->    Cu(OH)2(s)      + 2NaNO3(aq)

        1.0 mole            2.0 mole                 1.0 mole          2.0 mole

number of mol of Cu(OH)2,

n = Molarity * Volume

= 35.0*0.167 = 5.845 millimoles

As clear in the equation, 1 mole of Cu(NO3)2 gives 1 mole of Cu(OH)2 , So, 5.845 millimoles of Cu(NO3)2 will produce 5.845 millimoles of Cu(OH)2

Mass of Cu(OH)2 = number of mol * molar mass

= 97.5*5.845*10^-3

= 0.570 grams

Thus, the correct answer is - 0.570 grams

8 0
2 years ago
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