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Luda [366]
3 years ago
5

A fission example is the combining of hydrogen isotopes. true or false

Chemistry
1 answer:
sweet-ann [11.9K]3 years ago
7 0
False. That example is of nuclear FUSION. :)
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Magnesium bromide is a binary ionic compound. From its formula, MgBr2, how do you know that
Scilla [17]
You that Mg is the metal if in the periodic table it lands between group 1-12. So yeas Mg is a metal because it lands in group 2.

8 0
3 years ago
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Methane is a type of coal.<br> true or false
Karolina [17]
The answer is false methane is emitted from coal
3 0
3 years ago
Determine the pH of a solution of 0.00278 M of HClO4. Report the answer to two digits past the decimal.
aleksandrvk [35]

Answer:

The pH of a solution of 0.00278 M of HClO₄ is 2.56

Explanation:

pH is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance and is calculated as:

pH= - log [H⁺]= - log [H₃O⁺]

On the other hand , a Strong Acid is that acid that in an aqueous solution dissociates completely. In other words, a strong acid completely dissociates into hydrogen ions and anions in solution.

HClO₄ is a strong acid, so in aqueous solution it will be  totally dissociated. Then, the concentration of protons is equal to the initial concentration of  acid and the pH will be calculated:

pH= - log 0.00278

pH= 2.56

<u><em>The pH of a solution of 0.00278 M of HClO₄ is 2.56</em></u>

8 0
3 years ago
<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B2.568%20%5Ctimes%205.8%7D%7B4.186%7D%20" id="TexFormula1" title=" \frac{2.568 \ti
melomori [17]
Using a calculator:

(2.568 x 5.8)/4.186 = 3.5581460…
= 3.56 (3sf)

You didn’t specify the correct number of significant figures needed.
3 0
2 years ago
Atoms,which are always neutral in electric charge, contain electrons as well as protons and neutrons. An electron has an electri
creativ13 [48]

Answer:

3

Explanation:

Since the atom has three electrons, it has a -3 electrical charge. Since atoms are neutral, 3 protons are needed to get the charge back to 0.

8 0
3 years ago
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