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sergey [27]
3 years ago
10

What does variable mean

Chemistry
1 answer:
DedPeter [7]3 years ago
4 0
In an experiement things that are changing are called variables.
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What is the identity of the element, and how many neutrons does it have? An elements most stable ion forms an ionic compound wit
Pani-rosa [81]

Answer:

B. CA, 14

Explanation:

Atoms of elements contain small particles known as electrons, neutrons, and protons. The nucleus of an atom is made up of neutrons and protons which are at the center of the atom. Electrons on the other hand surrounds the nucleus. Electron has negative charge while proton has a positive charge. The number of neutrons is equivalent to the number of protons . In addition, the number of protons is equal to mass number minus the number of electrons.

For the compound XCl_{2}, it can be broken down into X^{2+} and 2Cl^{-}. Its ion has a mass of 34 and 18 electrons which means it has already lost 2 electrons.

Therefore:

For the given element, the number of electrons is 18+2 = 20 electrons.

The number of protons = 34 - 20 = 14.

And the number of neutrons is 14.

Only option B has the correct answer.

6 0
3 years ago
What did the periodic table help scientists discover?
Monica [59]
They discovered that *elements* show increase in atomic numbers across the period.
8 0
3 years ago
Read 2 more answers
How did scientists discover that Earth's outer core is liquid?
Sholpan [36]
They discovered this since S waves don’t travel through the earth but P waves do. P waves tend to travel faster than S waves in speed, 1&14km/s vs 1&8km/s
3 0
3 years ago
To what temperature in kelvin will a 2.3 L balloon have to be heated to expand to a volume of 400 L Assume the initial temperatu
olchik [2.2K]

Answer:

T₂ = 51826.1 K

Explanation:

Given data:

Initial Volume = 2.3 L

Final volume = 400 L

Initial temperature = 25 °C (25+ 273 = 298 K)

Final temperature = ?

Solution:

V₁/T₁ = V₂/T₂

T₂ = V₂ T₁/V₁

T₂ =  400 L . 298 K / 2.3 L

T₂ = 119200 K. L / 2.3 L

T₂ = 51826.1 K

7 0
3 years ago
Which contain a common ion that will shift the equilibrium system represented by the equation shown? Select all that apply. MgSO
inn [45]

The compounds in the reaction that shifts the equilibrium with the common ion effect are \rm MgSO_2\;and\;HNO_3.

<h3>What is the common ion effect?</h3>

The equilibrium condition has an equal amount of reactant and products in the reaction.

The addition of ions same as product or reactant results in a change in the equilibrium of condition and shifts the equilibrium in opposite direction.

The given reaction is:

\rm H_2SO_4\;\rightleftharpoons 2H^+\;+\;SO_4^{2-}

The addition of sulfate and hydrogen ions shifts the equilibrium.

Thus, the compounds that shift the equilibrium for the reaction are \rm MgSO_2\;and\;HNO_3.

Learn more about equilibrium, here:

brainly.com/question/4289021

4 0
1 year ago
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