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PilotLPTM [1.2K]
3 years ago
12

In 1913, Henry Moseley discovered a way to calculate the atomic number for each element and it was determined to arrange the per

iodic table by atomic number and not atomic mass. Why is atomic number the better way to organize the elements of the periodic table and not organizing by atomic mass?
A.The atomic mass can vary based on the number of neutrons the atoms of the same element have, so the atomic mass may not be in order.  Also, the atomic number is unique to each element.

B.The atomic number can be different for atoms of the same element, so it makes the patterns of the periodic table more varied.

C.The atomic number can vary based on the number of neutrons the atoms of the same element have, so the atomic mass may not be in order.  Also, the atomic mass is unique to each element.

D.The atomic number and atomic mass are equivalent, so the atomic number is used because it is a smaller number
Chemistry
1 answer:
Morgarella [4.7K]3 years ago
7 0
I'm not exactly sure but I believe that it is A it may be C
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A sealed container can hold
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0.216 moles of gas can the container hold if a sealed container can hold 0.325 L of gas at 1.00 atm and 293 K.

<h3>What is an ideal gas equation?</h3>

The ideal gas law (PV = nRT) relates the macroscopic properties of ideal gases. An ideal gas is a gas in which the particles (a) do not attract or repel one another and (b) take up no space (have no volume).

PV=nRT, where n is the moles and R is the gas constant. Then divide the given mass by the number of moles to get molar mass.

Given data:

R = gas constant = 0.08206 L.atm / mol K  

T = temperature, Kelvin  

V=5 L

P = 1.05 atm

T = 296 K

Putting value in the given equation:

\frac{PV}{RT}=n

n= \frac{1.05 atm\; X \;5 L}{ 0.08206 L.atm / mol K  X 296 K}

Moles = 0.216 moles

Hence, 0.216 moles of gas can the container hold if a sealed container can hold 0.325 L of gas at 1.00 atm and 293 K.

Learn more about the ideal gas here:

brainly.com/question/27691721

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6 0
2 years ago
A specialist that study substance obtained by attained mining is called a what​
galina1969 [7]

Answer:

Explanation:

Mining:

   

   

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7 0
1 year ago
Write the reaction from the word equation and then balence the equation
Mars2501 [29]
<h3>Answer:</h3>

Ni + Pb(NO₃)₂ → Ni(NO₃)₃ + Pb

<h3>Explanation:</h3>

We are required to write a balanced equation from the word equation;

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That is;

Ni + Pb(NO₃)₂ → Ni(NO₃)₃ + Pb

We then balance the equation;

  • To balance the equation, we put appropriate coefficients on reactants and products, so that the number of atoms of each element is equal on both sides of the equation.
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2Ni + 3Pb(NO₃)₂ → 2Ni(NO₃)₃ + 3Pb

4 0
3 years ago
Why is an atom regarded as electrically unstable​
meriva

Answer: An atom can be considered unstable in one of two ways. If it picks up or loses an electron, it becomes electrically charged and highly reactive. Such electrically charged atoms are known as ions. Instability can also occur in the nucleus when the number of protons and neutrons is unbalanced.

Explanation:

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Answer:

The symbol for decimeter is dm

Explanation:

No need for an explanation

5 0
3 years ago
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