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3 years ago

Where are the electrons found in Bohrs atomic atom

Chemistry

1 answer:

AnnZ [28]3 years ago

8 0

Answer:

The elections circle ITS B TRUST ME I JUST DID IT

Explanation:

Apex

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What would be the greatest difference in using an open ceramic coffee mug rather than an insulated mug with a lid as a calorimet

STALIN [3.7K]

Answer:

Hi. Increased evaporation would be the greatest difference.

Explanation:

Have you ever had a drink in a mug with a lid? When you would remove the lid, all of the liquid on the lid is the liquid that would evaporate if there was no lid.

6 0

3 years ago

Read 2 more answers

Determine the heat needed to warm 25.3 g of copper from 22 degrees celsius to 39 degrees celsius.

Serggg [28]

Answer:

The heat needed to warm 25.3 g of copper from 22°C to 39°C is 165.59 Joules.

Explanation:

$Q=mc\Delta T$

Where:

Q = heat absorbed or heat lost

c = specific heat of substance

m = Mass of the substance

ΔT = change in temperature of the substance

We have mass of copper = m = 25.3 g

Specific heat of copper = c = 0.385 J/g°C

ΔT = 39°C - 22°C = 17°C

Heat absorbed by the copper :

$Q=25.3 g\times 0.385 J/g^oC\times 17^oC=165.59 J$

The heat needed to warm 25.3 g of copper from 22°C to 39°C is 165.59 Joules.

5 0

4 years ago

How does a chemical clock work

Rudik [331]

Answer:

The reaction in this experiment is termed an iodine clock reaction, because it is the molecular iodine (I2) that undergoes the sudden concentration change. When the iodine concentration increases, it reacts with the starch in the solution to form a complex, turning it a deep blue-black color.

3 0

3 years ago

Somebody please answer

Zepler [3.9K]

Answer:

177 mmHg

Explanation:

Given that:

The sample of a gas is with Pressure (1) $P_1$ = 500 mmHg

The initial temperature $T_1$ = 773 K

The final temperature $T_2$ = 273 K

Using ideal gas equation:

$\dfrac{P_1}{T_1} = \dfrac{P_2}{T_2} \\ \\ \dfrac{500}{773} = \dfrac{P_2}{273} \\ \\ (136500) = 773 \times P_2 \\ \\ P_2 = \dfrac{136500}{773} \\ \\ P_2 = 176.58 \ mmHg \\ \\ \simeq 177 mmHg$

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3 years ago

What is the purpose of control set up

Archy [21]

The purpose of preparing Set-up _ is to act as a control set-up to ensure that the (measured variable) is only caused by the(changed variable) and not any other variables in the experiment.

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3 years ago