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Lady_Fox [76]
3 years ago
13

Describe how the proton, electron and neutron were experimentally discovered.

Chemistry
1 answer:
alexandr1967 [171]3 years ago
5 0
The discovery of protons can be attributed to Rutherford. ... Given the discoveries of electrons in 1897 by Thomson, Rutherford and other scientists decided that a positively charged particle must exist to center the electron to create equally neutral atoms. Thomson proposed the name 'positive rays'.
You might be interested in
How many atoms are in 200.0 grams of Sulfur (S)?
Mama L [17]

Answer:

37.64 × 10²³ atoms

Explanation:

Given data:

Number of atoms = ?

Mass of sulfur = 200.0 g

Solution:

First of all we will calculate the number of moles of sulfur.

Number of moles = mass/molar mass

Number of moles = 200.0 g/ 32 g/mol

Number of moles = 6.25 mol

Number of atoms:

Avogadro number:

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ atoms

6.25 mol × 6.022 × 10²³ atoms / 1mol

37.64 × 10²³ atoms

4 0
2 years ago
What is the density of a liquid is 67.1 mL of liquid weighs 55.221 g
Mnenie [13.5K]

Answer:

<h2>0.82 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume} \\

From the question we have

density =  \frac{55.221}{67.1}  \\  = 0.822965...

We have the final answer as

<h3>0.82 g/mL</h3>

Hope this helps you

6 0
3 years ago
How do sea breezes and land breezes affect local weather
Amiraneli [1.4K]
They send warmer and colder temperatures to different places (I may be wrong so you should just pick the answer above mine)
3 0
3 years ago
Consider a solution containing 0.100 M fluoride ions and 0.126 M hydrogen fluoride. The concentration of fluoride ions after the
Nataliya [291]

Answer: The concentration of fluoride ions after the addition of 9.00 mL of 0.0100 M HCl to 25.0 mL of this solution is 0.0709 M.

Explanation:

Given: Concentration of hydrogen fluoride = 0.126 M

Concentration of fluoride ions = 0.1 M

Volume of HCl = 9.0 mL

Concentration of HCl = 0.01 M

Volume of HCl = 25.0 mL

Moles of F^{-} ions are calculated as follows.

Moles of F^{-} = molarity \times volume\\= 0.1 M \times 0.025 L\\= 0.0025 mol

Moles of HF are as follows.

Moles of HF = Molarity \times Volume\\= 0.126 M \times 0.025 L\\= 0.00315 mol

Moles of HCl are as follows.

Moles of HCl = Molarity \times volume\\= 0.01 M \times 0.009 L\\= 0.00009 mol

Now, reaction equation with initial and final moles will be as follows.

                        H^{+}  + F^{-}  \rightarrow  HF

Initial:      0.00009  0.0025    0.00315

Equilibrium:      (0.0025 - 0.00009)    (0.00315 + 0.00009)

                                = 0.00241                    = 0.00324

Total volume = (9.00 mL + 25.0 mL) = 34.0 mL = 0.034 L

Hence, concentration of fluoride ions is calculated as follows.

Concentration = \frac{moles}{volume}\\= \frac{0.00241 mol}{0.034 L}\\= 0.0709 M

Thus, we can conclude that concentration of fluoride ions after the addition of 9.00 mL of 0.0100 M HCl to 25.0 mL of this solution is 0.0709 M.

7 0
3 years ago
Number of H in 3(NH4)2Cro4
zlopas [31]

The number of H atoms in 3(NH₄)₂CrO₄ = 24

<h3>Further explanation  </h3>

The empirical formula is the smallest comparison of atoms of compound forming elements.  

A molecular formula is a formula that shows the number of atomic elements that make up a compound.  

(empirical formula) n = molecular formula  

Subscripts in the chemical formula indicate the number of atoms

The compound of 3(NH₄)₂CrO₄ ( 3 molecules of (NH₄)₂CrO₄ ) :

Number of H :

\tt 4\times 2(subscript)\times 3(coefficient,number~of~molecules)=24~atoms

7 0
3 years ago
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