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padilas [110]
3 years ago
5

Is the atomic number the lesser or the greater of the numbers for each atom on the periodic table?

Chemistry
1 answer:
SOVA2 [1]3 years ago
3 0
Lesser. atomic number means proton number
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From the image the answer is 24.

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2, 4, 1

Explanation:

We have the following chemical reaction:

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To balance the chemical equation the number of atoms of each element entering the reaction have to be equal to the number of atoms of each element leaving the reaction, in order to conserve the mass.

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Is there a difference between a homogeneous mixture of hydrogen and oxygen in a 2:1 ratio and a sample of water vapor?
Feliz [49]

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Explanation:

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3 years ago
If you have 250 mL of 0.75 M LINO2.<br> How many grams of this substance<br> would you have?
Vesna [10]

Mass of this substance = 9.928 g

<h3>Further explanation</h3>

Molarity is a way to express the concentration of the solution

Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution

\large{\boxed {\bold {M ~ = ~ \frac {n} {V}}}

Where

M = Molarity

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V = Volume of solution

So to find the number of moles can be expressed as

\boxed{\bold{n=V\times M}}

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V = 250 ml = 0.25 L

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\tt n=0.25\times 0.75=0.1875

So mass of this substance -  LiNO₂ (MW=52,947 g/mol) :

\tt mass=mol\times MW\\\\mass=0.1875\times 52,947 g/mol\\\\mass=9.928~g

4 0
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