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inn [45]
3 years ago
7

The arrangement of things in the order that they occurred.

Chemistry
2 answers:
lana66690 [7]3 years ago
7 0
It’s B chronological order
RoseWind [281]3 years ago
4 0
The answer is B: chronological order
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Draw the Lewis structure for the Se and 2 H atoms.
fomenos
When  drawing lewis dot  diagram  structure  we  consider the  number  of  valence electrons  of  the atom.Se  has  six valence electrons since  it  is  in  group  six thus  it Lewis  dot diagram  is  as  follows
       ..
     : Se:
Hydrogen  is  in  group  one  hence  has  one  valence  electron.The  lewis dot  diagram  for  2H is  therefore
        H:H
3 0
3 years ago
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If 5. 0 grams of kcl is dissolved in 500 ml of water, what is the concentration of the resulting solution?
Lady_Fox [76]

If 5.0 grams of KCl is dissolved in 500 ml of water, the concentration of the resulting solution will be 0.134M.

<h3>How to calculate concentration?</h3>

The concentration of a solution can be calculated by using the following formula;

Molarity = no of moles ÷ volume

According to this question, 5.0 grams of KCl is dissolved in 500 ml of water. The concentration is calculated as follows:

no of moles of KCl = 5g ÷ 74.5g/mol = 0.067mol

Molarity = 0.067mol ÷ 0.5L = 0.134M

Therefore, if 5.0 grams of KCl is dissolved in 500 ml of water, the concentration of the resulting solution will be 0.134M.

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6 0
2 years ago
What are 5 most abundant elements in the Earth's crust​
allochka39001 [22]

Explanation:

Element Abundance percent by weight Abundance parts per million by weight

Oxygen 46.1% 461,000

Silicon 28.2% 282,000

Aluminum 8.23% 82,300

Iron 5.63% 56,300

4 0
3 years ago
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If the pH changes from 5 to 6, the H+ would concentration would?
Strike441 [17]
Decrease by factor 10
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Lead (II) nitrate reacts with ammonium carbonate to produce ammonium nitrate
vitfil [10]

Pb(NO₃)₂ + (NH₄)₂CO₃ → PbCO₃ + 2 NH₄NO₃

Explanation:

Reaction of lead (II) nitrate with ammonium carbonate will produce lead (II) carbonate and ammonium nitrate.

The balanced chemical equation is:

Pb(NO₃)₂ + (NH₄)₂CO₃ → PbCO₃ + 2 NH₄NO₃

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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balancing chemical reactions

brainly.com/question/13911443

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3 0
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