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salantis [7]
2 years ago
15

What is the length of the pencil in cm?

Chemistry
1 answer:
Levart [38]2 years ago
7 0

Answer:

16 cm

Explanation:

Because when you look at the ruler, it shows the length  as 16 cm

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What is the Noble gas notation for mercury (Hg)?.
lapo4ka [179]
The noble gas notation of an element includes a noble gas as a condensed way to describe the electronic configuration of an element. IN this case, the nearest noble gas is xenon with an atomic number of 54. Hg's atomic number is 80 so we need 26 more. In this case, after [Xe], the configuration starts with 6s². Hence to complete the configuration the answer is  [Xe] 6s2  4f14 5d10
4 0
3 years ago
Ethylene, a gas found in nature, is commonly used to ripen bananas and other fruits. Which compound is ethylene?
Reika [66]

Answer:

C2H4

Explanation:

cause the compound of ethylene is C2H4

6 0
3 years ago
Which is an example of making a quantitative observation?
Zolol [24]
Answer:
measuring the mass of metal used in a reaction
3 0
3 years ago
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Describe the separation technique that could be used to separate two colorless liquids with varying boiling points.
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Distillation; either simple or fractional macroscale depending on how far apart the boiling points are. 
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3 years ago
What is the empirical formula of a compound that contains 25.92 percent nitrogen and 74.07 percent oxygen?
pychu [463]

<span><span>N2</span><span>O5</span></span>

Explanation! 

When given %, assume you have 100 g of the substance. Find moles, divide by lowest count. In this case you'll end up with

<span><span>25.92 g N<span>14.01 g N/mol N</span></span>=1.850 mol N</span>

<span><span>74.07 g O<span>16.00 g O/mol O</span></span>=4.629 mol O</span>

The ratio between these is <span>2.502 mol O/mol N</span>, which corresponds closely with <span><span>N2</span><span>O5</span></span>.

4 0
3 years ago
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