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Levart [38]
3 years ago
5

Chemistry how do you count atoms? 4 HNO3

Chemistry
1 answer:
lions [1.4K]3 years ago
6 0
Step 1: Write the chemical formula.
Step 2: List all the atoms.
<span>Step 3: </span>Count<span> the number of </span>atoms<span> of each element in 1 molecule.
Step 4: Multiply the number of </span>atoms<span> of each by the coefficient.
Step 5: Make sure your answer makes sense.</span>
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Which explains how burning a magnesium ribbon highlights a toolmark?
Setler [38]
<h2>Answer:</h2>

The magnesium ribbon, <u>D. It forms a material to cast the tool mark</u>.

<h2>Explanation:</h2>

When a magnesium ribbon is burnt in the presence of oxygen it gives out strong light and heat is produced. Apart from it, it leads to the production of substance called as magnesium oxide which is formed as the product due to the reaction of magnesium with the oxygen present in the air.

Tool marks are the mark which is created by tools while using them. In order to identify or locate them castes made up of magnesium oxide is utilized. When this is pasted on the suspected area, the tool mark of the suspected tool gets pasted on it.

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______________ results in a new substance and it cannot be reversed
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What is a homologous structure that humans share with other vertebrates when they are fully grown?
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3 years ago
CH3-C_=CH + HCl ( 1:2) --&gt;
svlad2 [7]
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A
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5 0
3 years ago
What is the pH of a weak base solution that has an [OH–] of 2.1 g 10–6 M? (4 points)<br><br> APEX
Amiraneli [1.4K]

Answer:

  • <u><em>8.3</em></u>

Explanation:

<u>1) Data:</u>

a) [OH⁻] = 2.1 × 10⁻⁶ M . . .  (the symbol g shown in the question is a typo)

b) pH = ?

<u>2) Formulae:</u>

  • pH + pOH = 14

  • pOH = log 1 /[OH⁻]

<u>3) Solution:</u>

  • pOH = log ( 1 / 2.1 × 10⁻⁶ ) = 5.7
  • pH = 14 - pOH = 14 - 5.7 =  8.3
5 0
3 years ago
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