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kirza4 [7]
3 years ago
15

10.How do you make sure there is no cross contamination of your samples of substances?

Chemistry
1 answer:
alexgriva [62]3 years ago
6 0
Have a clean workspace, always wear clean gloves, never reuse or leave Lab wearing gloves, sanitize!
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A student made the Lewis dot diagram of a compound as shown. Mg is written with two dots shown on its top. Cl is written on the
blsea [12.9K]

Answer:

The dots were not properly located and arrows are not used in Lewis structures

Explanation:

If we intend to write a Lewis structure for a compound, that lewis structure must consist of only dots. These dots actually show the valence electrons on the outermost shell of the molecule.

We do not involve arrows when writing dot electron structures for compounds. The valence electrons of magnesium ought not to be written together because they are not a lone pair, rather they are two unpaired electrons. The use of an arrow suggests a coordinate covalent bond which is not the case here.

The correct lewis structure for MgCl2 is shown in the image attached to this answer.

7 0
3 years ago
What is the electron configuration for lithium​
Oduvanchick [21]

Answer:

2,1

Explanation:

4 0
2 years ago
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How do sedimentary rocks form on Earth's surface?
Nady [450]

nnAnswer:

Explanation:

8 0
2 years ago
How is the melting point of a substance recorded
GrogVix [38]

1. slowly heat stubstance.

2. once the substance is at the most liqued state take the temp. that's the melting point of that subtance.

hope that helps, any other questions feel free to DM me dont wate your points. :)

6 0
2 years ago
What is the freezing point depression of a solution that contains 0.705?
Sveta_85 [38]
Colligative properties calculations are used for this type of problem. Calculations are as follows:<span>
</span>

<span>ΔT(freezing point)  = (Kf)m
ΔT(freezing point)  = 1.86 °C kg / mol (0.705)
ΔT(freezing point)  = 1.3113 °C

</span>

<span>
</span>

<span>Hope this answers the question. Have a nice day.</span>

6 0
3 years ago
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