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3 years ago

When a liquid evaporates

1 answer:

4 0

When a liquid evaporates, it releases heat energy into the surroundings because the molecules obtain energy ( when they are being evaporates), causing the molecules to vibrate fast and escape into the atmosphere!

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calculate the number of coulombs of positive charge in 250cm 3 of (neutral) water. (hint: a hydrogen atom contains one proton; a

Sidana [21]

Number of coulombs of positive charge in 250cm^3 water is 1.3×10^7 C

The volume of 250 cm^3 corresponds to a mass of 250 g since the density of water is 1.0 g/cm^3

This mass corresponds to 250/18 = 14 moles since the molar mass of water is 18. There are ten proton (each with charge q = +e) in each molecule of $H_{2}O$ So,

Q = 14NA q =14(6.02×10^23)(10)(1.60×10^−19C) = 1.3×10^7 C.

Mass is the quantity of matter in a physical body. It is also a measure of the body's inertia, the resistance to acceleration when a net force is applied. An object's mass also determines the strength of its gravitational attraction to other bodies.

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2 years ago

Treatment of (S)-( )-5-methyl-2-cyclohexenone with lithium dimethylcuprate gives, after protonolysis, a good yield of a mixture

tekilochka [14]

Answer:

use google and use the first link

Explanation:

6 0

3 years ago

When an atom of oxygen, atomic number 8, forms an ion what is the overall charge of that

lesya [120]

A. 1-

Explanation:

When an atom of oxygen with an atomic number of 8 forms an ion, the overall charge on it will be -1

When atoms from ions, they either lose or gain electrons in the process.

If an atom loses electrons, they become positively charged.

When they gain electrons, they become negatively charged.

An atom is made up of three fundamental particles;

Protons the positively charged particles

Electrons are negatively charged

Neutrons do not carry any charges.

In a neutral atom, the number of protons and electrons are the same

When an atom gains electrons, the number of electrons in it increases and it becomes negatively charged.

When they lose electrons, the number of protons is more and they become positively charged.

Oxygen atoms prefers to gain electrons in order to have a complete octet. When they gain an electron;

With the atomic number of 8:

Number of proton = 8

Number of electrons = 9

Charge = 8-9 = -1

We can represent this as O¹⁻

Ideally, oxygen prefers to gain two electrons to mimic the structure of the noble gas Neon.

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Anions in binary compounds brainly.com/question/11041787

Anions brainly.com/question/4670413

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4 years ago

1. What would happen if you aimed light from the magenta part of the Horsehead Nebula through a spectrograph?

otez555 [7]

Given what we know, we can confirm that if you aimed light from the magenta part of the Horsehead Nebula through a spectrograph we would be able to determine more precisely the structure and details of the cloud.

<h3>How do we use Spectrums in order to understand stars?</h3>

The spectrums recorded by scientists, such as those of stars or nebulas like the horsehead nebula can tell us a great deal about the composition of said entities. Studying the spectrum can tell scientists about the chemical composition of stars or nebulas, such as information about the elements that form them, like their temperatures and densities.

<h3 /><h3>How would a discontinuous emission of hydrogen gas look in the spectrum?</h3>

This would appear as pauses in the lines of the spectrum. If the emission of the hydrogen gas were constant, there would be a continuous line on the spectrum graph to indicate the illuminated hydrogen, though if this line were discontinuous, we would be able to assume that its source is emission from another gas instead.

Therefore, we can confirm that spectrography is an essential part of scientific discovery pertaining to our universe. It allows us to study the chemical composition of stars and nebulas, and determine the sources of certain emissions like that of hydrogen gases.

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4 0

2 years ago

How many moles are in 182 grams of BC13?

spayn [35]

Answer:

Explanation:

5 0

3 years ago