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kondaur [170]
3 years ago
10

4. Consider the following statement made in Chapter 4 of the text: "... consider that if the

Chemistry
1 answer:
AveGali [126]3 years ago
3 0

The claim: "If the nucleus were the size of a grape, the electrons would be one mile away on average" is reasonably accurate because the ratios between the nucleus's sizes and the distances (between electrons and nucleus) for the two given examples are in the same order of magnitude.      

To know if the claim is accurate we need to calculate the ratio of the size of the nucleus (the same as a grape) and the distance between the electrons and the nucleus for example 1 (r₁):  

r_{1} = \frac{s_{1}}{d_{1}}    (1)

and to compare it with the ratio of the size and the distance given in example 2 (r₂):

r_{2} = \frac{s_{2}}{d_{2}}    (2)

<em>Where:</em>

s₁: is the size of the nucleus (like the size of a grape)

d₁: is the distance between electrons and nucleus of example 1 = 1 mile

s₂: is the average diameter of the nucleus  = 10⁻¹³ cm

d₂: is the average distance between electrons and nucleus of example 2 = 10⁻⁸ cm

Assuming that the diameter of a grape is 3 cm (in a spherical way), the ratio of the <u>first example</u> is (eq 1):

r_{1} = \frac{3 cm}{1 mi*\frac{160934 cm}{1 mi}} = 1.86 \cdot 10^{-5}

Now, the ratio of the <u>second example</u> is (eq 2):

r_{2} = \frac{10^{-13} cm}{10^{-8} cm} = 1.00 \cdot 10^{-5}              

Since r₁ and r₂ are in the same order of magnitude (10⁻⁵), we can conclude that the given claim is reasonably accurate.      

You can learn more about the nucleus of an atom here: brainly.com/question/10658589?referrer=searchResults

I hope it helps you!                

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Answer:

1350 g

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8 0
3 years ago
The following boiling points correspond to the substances listed. Match the boiling points to the substances by considering the
Julli [10]

Answer:

CH₄                                - 162 ⁸C

CH₃CH₃                          -88.5 ⁸C

(CH₃)₂ CHCH₂CH₃         28 ⁸C

CH₃3(CH2)₃CH₃             36 ⁸C

CH₃OH                           64.5 ⁸C

CH₃CH₂OH                     78.3 ⁸C

CH₃CHOHCH₃                82.5 ⁸C

C₅H₉OH                         140 ⁸C

C₆H₅CH₂OH                   205 ⁸C

HOCH₂CHOHCH₂OH    290 ⁸C

Explanation:

To answer this question we need first to understand that for organic compounds:

a. Non polar compounds have lower boiling points than polar ones of similar structure and molecular weight.

b. Boiling points increase with molecular weight.  In alkane compounds if we compare  isomers, the  straight chain isomer will have a higher boiling point than the branched one (s) because of London dispersion intermolecular forces.

a. The introduction of hydroxyl groups increase the intermolecular forces and hence the boiling points because the electronegative oxygen, and, more importantly the presence  of hydrogen bonds.

Considering the observations above, we can match the boiling points as follows:

CH₄                                - 162 ⁸C

CH₃CH₃                          -88.5 ⁸C

(CH₃)₂ CHCH₂CH₃         28 ⁸C

CH₃3(CH2)₃CH₃             36 ⁸C

CH₃OH                           64.5 ⁸C

CH₃CH₂OH                     78.3 ⁸C

CH₃CHOHCH₃                82.5 ⁸C

C₅H₉OH                         140 ⁸C

C₆H₅CH₂OH                   205 ⁸C

HOCH₂CHOHCH₂OH    290 ⁸C

Note: There was a mistake in the symbols used for the  162 and 88.5 values which are negative and correspond to the common gases methane and ethane

7 0
3 years ago
One cup of fresh orange juice contains 115 mg of ascorbic acid (vitamin c, c6h8o6). given that one cup
kodGreya [7K]
The question is incomplete. Complete question is read as:
'<span>One cup of fresh orange juice contains 115 mg of ascorbic acid (vitamin C, C6H8O6). Given that one cup = 218.0 mL calculate the molarity of vitamin C in organic juice.'
..........................................................................................................................
Answer:
Given: weight of solute (ascorbic acid) = 115 mg = 0.115 g
Volume of solution = 218.0 mL = 0.218 L
Molecular weight of ascorbic acid = 176.12 g/mol.

Now, Molarity = </span>\frac{\text{weight of solute(g)}}{\text{Molecular weight X Vol. of solution(l)}}
                       = \frac{\text{0.115}}{\text{176.12 X 0.218}}
<span>                       = 0.002995 mol/dm3

Answer: Molarity of solution = </span>0.002995 mol/dm3<span>

</span>
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It's Peggy Sue's birthday and she's about to blow out the candles on her cake. Brother Roger stops the party when he shouts: "Lo
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This example is an controversial matter because melting an candle is considered as both physical change and chemical change because no new substances were made by melting an candle. The final answer is C.
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Elena-2011 [213]

Answer:

Cl-

Explanation:

The equation of the reaction is;

H+(aq)+Cl-(aq)+H2O(l)→H3O+(aq)+Cl-(aq)

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If we look at the products, Cl- is a Lewis base because it is a lone pair donor. We see this more clearly because the specie is negatively charged.

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