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balu736 [363]
2 years ago
13

When a substance changes from a solid to a liquid, is a new substance made?

Chemistry
1 answer:
anygoal [31]2 years ago
6 0

Answer:

no

Explanation:

it means melting or fusion so yhe answer is no

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Formula for calculating pressure​
Anna35 [415]

Answer:

The formula for pressure is P = F/A, in which P is pressure, F is force, and A is area.

Explanation:

6 0
3 years ago
the red line observed in the line spectrum for hydrogen has 3.03x10^-19J, what is the wavelength, in nm, of this?
djverab [1.8K]

Answer:

λ = 6.5604 x 1016 nm

Explanation:

Given Data:

The energy of the red line in Hydrogen Spectra = 3.03 x 10-19

Formula to calculate Wave length

E= hv

Where E is Energy

h is Planks Constant = 6.626 x 10–34 J s

v is frequency

In turn

v= c/ λ

where c is speed of light = 3.00 x 108 m s–1

λ is wavelength = to find

Solution:

Formula to be Used:

E= hv………………………… (1)

Putting the value v in equation 1

               E= h c/ λ…………………… (2)

Put the value in equation 2

3.03 x 10-19 J  = (6.626 x 10–34 J s) x (3.00 x 108 m s–1) / λ ……………………….(3)

By rearranging equation 3

λ = (6.626 x 10–34 J s) x (3.00 x 108 m s–1) /3.03 x 10-19  J

λ = 6.5604 x 107 m

The answer is in “m”

So we have to convert it into nm

So for this to convert “m” to “nm” multiply the answer with 109

λ = 6.5604 x 107 x 109

λ = 6.5604 x 1016 nm

6 0
3 years ago
Why do we crack molecules?
tino4ka555 [31]

We need to crack molecules in order for us to get the desired molecule. For example, in the extraction of crude oil, after entering the fractional distillation, it will give products base on their molecular structure. The products are gasoline, diesel fuel, jet fuel, wax, asbestos,kerosene.

4 0
3 years ago
Read 2 more answers
Can someone please help me ANSWER this question down below?
julsineya [31]

This statement is true

4 0
3 years ago
What is melted rock and minerals found beneath earths rust called
satela [25.4K]
Magma- hot fluid or semifluid material below or within the earth's crust from which lava and other igneous rock is formed by cooling. Hope this helps!
3 0
3 years ago
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