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Artyom0805 [142]
2 years ago
13

Answer the question below based on the periodic table entry for iron.

Chemistry
1 answer:
denis23 [38]2 years ago
4 0
The atomic number is usually shown at the top of the element (on periodic table)

(I’ve attached an image for you to understand visually)

Answer: 26

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A gas at constant temperature has a pressure of 404.6 kPa with a volume of 12 ml. If the volume changes to 43ml, what is the new
blagie [28]

Answer:

The answer is

<h2>112.912 kPa</h2>

Explanation:

The new pressure can be found by using the formula for Boyle's law which is

P_1V_1 = P_2V_2

Since we are finding the new pressure

P_2 =  \frac{P_1V_1}{V_2}  \\

404.6 kPa = 404600 Pa

From the question we have

P_2 =  \frac{404600 \times 12}{43}  =  \frac{4855200}{43}  \\  = 112911.6279... \\  = 112912

We have the final answer as

<h3>112.912 kPa</h3>

Hope this helps you

4 0
3 years ago
How does the flow of energy during freezing compare with the flow of energy during melting
lianna [129]

Answer:

At the melting point, some molecules overcome the forces of attraction. Energy gained after the the solid melts increases the average kinetic energy or the temperature. When liquid is freezing the energy flows out the the liquid. As the kinetic energy decreases, they move more slowly.

Explanation:

3 0
2 years ago
Even when an object appears to be at rest, its atoms and molecules are in constant motion
natita [175]

Answer:

the answer is True

Explanation:

the answer is True

5 0
2 years ago
Dalton incorporated the law of conservation of mass into his atomic theory by asserting that
Feliz [49]

Answer:

a. atoms are indivisible. ... atoms can not be destroyed in chemical reactions.

Explanation:

Hope this helped :D

7 0
2 years ago
Identify and explain exothermic and endothermic reactions in terms of energy transfer
Ulleksa [173]
Exothermic reaction is when the system releases energy to the surrounding, the energy (in the perspective of the system) will have a sign of negative, as the system is transferring energy towards the surrounding.

Endothermic reaction is when the system is absorbing energy from the surrounding, the energy (in the perspective of the system) will have a sign of positive, as energy is transferred to the system.
5 0
3 years ago
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