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Juliette [100K]
3 years ago
10

A change from one state of matter to another involves the transfer of

Chemistry
2 answers:
Alja [10]3 years ago
5 0
A heat because heat is the transfer of energy.
Alja [10]3 years ago
5 0

Answer: Option (a) is the correct answer.

Explanation:

Change in state of a substance occurs due to change in position of atoms by absorption or release of heat energy.

For example, ice is the solid state of water and when we keep it at room temperature then it absorbs heat from its surroundings. As a result, intermolecular forces of attraction between its molecules weaken.

Due to this particles or atoms gain kinetic energy and they tend to move away from each other.

Thus, we can conclude that a change from one state of matter to another involves the transfer of heat.

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What is the energy of a single photon of blue light with a wavelength of 488 nm (488 × 10-9 m)?
Vinvika [58]
E = hf

c = speed of electromagnetic wave, c ≈ 3 * 10⁸ m/s, 
Planck's constant h = 6.63 *10⁻³⁴ Js

h = Planck's constnat,  Frquency, f = c/λ = (3*10⁸)/(488*10⁻⁹)

E = hf

E = hc/λ

E = (6.63 * 10⁻³⁴ * 3 * 10⁸) /(488 * 10⁻⁹)

Energy, E ≈ 4.0758 * 10⁻¹⁹  Joules.
3 0
3 years ago
Read 2 more answers
The amount of space an object takes up is called _____. gravity weight mass volume
baherus [9]
Volume is the amount of space an object takes up
4 0
3 years ago
What is the electron configuration of an element with atomic number 20? A. 1s2 2s2 2p6 3s2 3p5 B. 1s2 2s2 2p6 3s2 3p6 C. 1s2 2s2
Cerrena [4.2K]

D.  The number of electrons equals the atomic number for a neutral element.  Each number after the letter refers to the number of electrons in that shell.  So for D, 2+2+6+2+6+2 = 20 electrons, which is equal to the atomic number.

8 0
3 years ago
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What if you measured 15cc of liquid elemental mercury, how much would that weigh in pounds
PIT_PIT [208]

Answer:

0.447 pounds

Explanation:

The density of Mercury in grams/mL is 13.55 - I multiplied that by the volume and got approximately 203.25 grams, I then turned it into Kilograms and multiplied by 2.2 lbs / kg.

4 0
3 years ago
How many moles are there in 5.30 x 1024 atoms of silver?
Rus_ich [418]

Answer:

The mass of

4.6

×

10

24

atoms of silver is approximately 820 g.

Explanation:

In order to determine the mass of a given number of atoms of an element, identify the equalities between moles of the element and atoms of the element, and between moles of the element and its molar mass.

1

mole atoms Ag=6.022xx10

23

atoms Ag

Molar mass of Ag =#"107.87 g/mol"#

Multiply the given atoms of silver by

1

mol Ag

6.022

×

23

atoms Ag

. Then multiply times the molar mass of silver.

4.6

×

10

24

atoms Ag

×

1

mol Ag

6.022

×

10

23

atoms Ag

×

107.87

g Ag

1

mol Ag

=

820 g Ag

6 0
3 years ago
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