What is the atomic mass for Helium (He)? Question 5 options: 8 2 3 4

1 answer:

3 0

It is 2 because if you have a chart that shown all the elements at the top left corner it would show a number and that is the atomic number

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Out of Br2 and NaBr which compound is more likely to be more soluble in CCl4

saul85 [17]

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3 years ago

What was the result of the atomic theory?

Cerrena [4.2K]

Answer:

The result of the atomic theory was atomic theory proposed that all matter was composed of atoms, also postulated that chemical reactions resulted in the rearrangement of the reacting atoms.

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3 years ago

Atomic number of f^-1

victus00 [196]

The atomic number is 9 Ions have the same atomic number since atomic number signifies number of protons not electrons

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Given the reaction: A + B <--> C + D

Lady_Fox [76]

Answer:

A.) 4.0

Explanation:

The general equilibrium expression looks like this:

$K = \frac{[C]^{c} [D]^{d} }{[A]^{a} [B]^{b} }$

In this expression,

-----> K = equilibrium constant

-----> uppercase letters = molarity

-----> lowercase letters = balanced equation coefficients

In this case, the molarity's do not need to be raised to any numbers because the coefficients in the balanced equation are all 1. You can find the constant by plugging the given molarities into the equation and simplifying.

$K = \frac{[C]^{c} [D]^{d} }{[A]^{a} [B]^{b} }$ <----- Equilibrium expression

$K = \frac{[2 M] [2 M]}{[1 M] [1 M] }$ <----- Insert molarities