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SpyIntel [72]
3 years ago
10

Which best describes an element?

Chemistry
1 answer:
Aleonysh [2.5K]3 years ago
6 0

I think the answer is a pure substance

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A piece of sodium metal can be described as?
vlada-n [284]

Answer:

A piece of sodium metal can be described as a pure substance and an element. ... Sodium is a soft, waxy, silvery, highly reactive metal. Sodium belongs to group 1 of the periodic table and it is highly abundant in the earth's crust. Sodium can also be found in various minerals such as rock salt, feldspars and sodalite.

Explanation:

here is short description that will help u 2 understand more

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6 0
3 years ago
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Where did you put H an He? What are your reasoning for placement?
aksik [14]

Answer:

On the placement of hydrogen and helium in the periodic system

H1=1

He2=2

3 0
3 years ago
Precision Problems:
Lorico [155]

Answer:

Precision = 2.70 \± 0.1\ cm

Explanation:

Given

The data in the table

Required

Follow the steps appended to the question;

Step 1: Calculate the Mean or Average

Mean = Summation of lengths divided by number of teams;

Mean = \frac{2.65 + 2.75 + 2.80 + 2.77 + 2.60 + 2.65 + 2.68}{7}\ cm

Mean = \frac{18.9}{7}\ cm

Mean = 2.70\ cm

Step 2: Get The Range

Range = Highest - Lowest

Range = 2.80cm - 2.60cm

Range = 0.2\ cm

Step 3: Divide Range by 2

Approximate\ Range = \frac{1}{2}Range

Approximate\ Range = \frac{1}{2} * 0.2\ cm

Approximate\ Range = 0.1\ cm

Step 4: Determine the Precision

Precision = Average \± Approximate\ Range

Substitute 2.70 for Average and 0.1 for Approximate Range

Precision = 2.70 \± 0.1\ cm

4 0
3 years ago
How many chiral carbons does the molecule have?
trapecia [35]

Answer:

The molecule has two chiral carbons

Explanation:

i hope its the right answer

7 0
3 years ago
A: IF TWO ANGLES ARE SUPPLEMENTARY, THEN ONE ANGLE IS ACUTE AND ONE IS OBTUSE.
nydimaria [60]

Answer:

True or False?

Explanation:

A. False and or sometimes.

B. False and or sometimes.

What is our main objective here??????????????????

3 0
2 years ago
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