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gregori [183]
3 years ago
15

ge\bold\red{{HELP}}" align="absmiddle" class="latex-formula">​

Chemistry
2 answers:
I am Lyosha [343]3 years ago
6 0

Answer:

<u>Question</u><u> </u><u>1</u><u>:</u>

<em>Answer</em><em>:</em><em> </em><em>True</em>

• A nucleus comprises of "proton and neutron"

<u>Question</u><u> </u><u>2</u><u>:</u>

<em>Answer</em><em>:</em><em> </em><em>True</em>

• Lithium atom has 3 protons while helium atom has 2 protons.

<u>Question 3:</u>

<em>Answer</em><em>:</em><em> </em><em>False</em>

• Molecular compounds are formed when elements are combined be it metal or non-metal.

• A compound formed from a metal and non-metal is an ionic compound.

<u>Question</u><u> </u><u>4</u><u>:</u>

<em>Answer</em><em>:</em><em> </em><em>False</em>

• Noble gases are inert / unreactive. They don't undergo any reaction because they are very stable.

<u>Question</u><u> </u><u>5</u><u>:</u>

<em>Answer</em><em>:</em><em> </em><em>True</em>

<u>Question</u><u> </u><u>6</u><u>:</u>

<em>Answer</em><em>:</em><em> </em><em>False</em>

{ \rm{H _{2}O \:  \dashrightarrow \: water}}

• The formular in the question is for hydrogen peroxide.

<u>Question</u><u> </u><u>7</u><u>:</u>

<em>Answer</em><em>:</em><em> </em><em>False</em>

• What you have to know is that, molecular compounds such as halogens are made of discrete particles with weak vander waals forces of attraction, hence energy required to break these forces is quite low. Hence low melting points.

<u>Question</u><u> </u><u>8</u><u>:</u>

<em>Answer</em><em>:</em><em> </em><em>True</em>

• Ionic compounds such as sodium chloride are highly soluble in water.

<u>Question</u><u> </u><u>9</u><u>:</u>

<em>Answer</em><em>:</em><em> </em><em>False</em>

• Water is a polar covalent compound because it is formed due to hydrogen and covalent bonding. It is polar because oxygen is highly electronegative than hydrogen.

<u>Question</u><u> </u><u>1</u><u>0</u><u>:</u>

<em>Answer</em><em>:</em><em> </em><em>False</em>

• Check answer for question 4

<u>Question</u><u> </u><u>1</u><u>1</u><u>:</u>

<em>Answer</em><em>:</em><em> </em><em>False</em>

• They form charge of +1

<u>Question</u><u> </u><u>1</u><u>2</u><u>:</u>

<em>Answer</em><em>:</em><em> </em><em>True</em>

• This are called radicals

<u>Question</u><u> </u><u>1</u><u>3</u><u>:</u>

<em>Answer</em><em>:</em><em> </em><em>False</em>

• least reactive families are halogens and noble gases.

<u>Question</u><u> </u><u>1</u><u>4</u><u>:</u>

<em>Answer</em><em>:</em><em> </em><em>True</em>

• This is a situation of ionic bonding.

<u>Question</u><u> </u><u>1</u><u>5</u><u>:</u>

<em>Answer</em><em>:</em><em> </em><em>False</em>

• It is made up of 3 atoms.

Sladkaya [172]3 years ago
4 0
  1. True
  2. True
  3. True
  4. False
  5. False
  6. False
  7. False
  8. True
  9. False
  10. False
  11. False
  12. True
  13. False
  14. True
  15. False

After looking at answers I agree with the statement Chemistry is fun.

You might be interested in
) Do you think the pH of 1,0 M tri-methyl ammonium (CH3)3NH+, pKa = 9.80, will be higher or lower than that of 1.0 M phenol, C6H
Elanso [62]

Answer:

1. The pH of 1.0 M trimethyl ammonium (pH = 1.01) is lower than the pH of 0.1 M phenol (5.00).

2. The difference in pH values is 4.95.

Explanation:

1. The pH of a compound can be found using the following equation:

pH = -log([H_{3}O^{+}])

First, we need to find [H₃O⁺] for trimethyl ammonium and for phenol.

<u>Trimethyl ammonium</u>:

We can calculate [H₃O⁺] using the Ka as follows:

(CH₃)₃NH⁺ + H₂O  →  (CH₃)₃N + H₃O⁺    

1.0 - x                               x           x  

Ka = \frac{[(CH_{3})_{3}N][H_{3}O^{+}]}{[(CH_{3})_{3}NH^{+}]}

10^{-pKa} = \frac{x*x}{1.0 - x}

10^{-9.80}(1.0 - x) - x^{2} = 0    

By solving the above equation for x we have:  

x = 0.097 = [H₃O⁺]

pH = -log([H_{3}O^{+}]) = -log(0.097) = 1.01                                      

<u>Phenol</u>:

C₆H₅OH + H₂O → C₆H₅O⁻ + H₃O⁺

1.0 - x                        x             x

Ka = \frac{[C_{6}H_{5}O^{-}][H_{3}O^{+}]}{[C_{6}H_{5}OH]}

10^{-10} = \frac{x^{2}}{1.0 - x}

1.0 \cdot 10^{-10}(1.0 - x) - x^{2} = 0

Solving the above equation for x we have:

x = 9.96x10⁻⁶ = [H₃O⁺]

pH = -log([H_{3}O^{+}]) = -log(9.99 \cdot 10^{-6}) = 5.00

Hence, the pH of 1.0 M trimethyl ammonium is lower than the pH of 0.1 M phenol.

2. The difference in pH values for the two acids is:

\Delta pH = pH_{C_{6}H_{5}OH} - pH_{(CH_{3})_{3}NH^{+}} = 5.00 - 1.01 = 4.95

Therefore, the difference in pH values is 4.95.

I hope it helps you!

7 0
3 years ago
Why is graphite used instead of gold or copper wires to conduct electricity in very hot situations such as an industrial kiln?
Molodets [167]
It wont melt like gold and copper would at that temperature

4 0
3 years ago
Read 2 more answers
Pepsi
kogti [31]

Answer:

A) They are all acidic.

Explanation:

All 3 of those have acidic qualities in the drink.

4 0
3 years ago
Read 2 more answers
The specific amount of energy an electron has, or its what, is related to its movement
hram777 [196]
I Think.

Neutron(s).

I Think.
5 0
3 years ago
A water molecule consists of an oxygen atom and two hydrogen atoms covalently bonded in a bent shape. Oxygen however, attracts t
77julia77 [94]

Answer:

D.

Explanation:

Water is polar, for one thing. Polar mixes with polar, nonpolar mixes wih nonpolar. This leaves D.

6 0
3 years ago
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