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telo118 [61]
2 years ago
6

Several balls and sticks glued together to represent a molecule

Chemistry
1 answer:
rewona [7]2 years ago
4 0

Answer:

The different elements are represented by their symbols one line shows a single bond and two lines show a double bond. This written representation is called a structural diagram

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Which statement describes a process involved in the evolution of Earth’s early atmosphere?
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The statement describes a process involved in the evolution of Earth’s early atmosphere would be:

Cyanobacteria transformed carbon dioxide in the atmosphere into oxygen during photosynthesis

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When do we classify a disease as pandemic
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a pandemic is a situation when people of suffering from the following disease is large in number or the cases are in larger number and it is

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Vanessa made a list comparing the differences between the outer coverings in plants and animals, but she made a mistake. Read th
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The difference between the outer covering of plants and animals is that plant cell has cellulose cell wall while animal cell is surrounded by a cell membrane

<h3>What is a cell?</h3>

A cell is the structural and functional unit of an organism which is capable of existing alone as it contains organelles that perform specific functions.

The plant cell is covered by a rigid cell wall which contains cellulose as its outer covering.

The animal cell contains not cellulose cell wall at its out covering but instead it is covered by a cell membrane.

Therefore, the difference between the outer covering of plants and animals is that plant cell has cellulose cell wall while animal cell is surrounded by a cell membrane.

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5 0
2 years ago
Which of the following statements are true? Significant figures in a measurement are all measured digits, and one estimated digi
Georgia [21]

Answer: Significant figures in a measurement are all measured digits, and one estimated digit

Significant figures communicate the level of precision in measurements Significant figures are an indicator of the certainty in measurements.

Explanation:

Significant figures : The figures in a number which express the value or the magnitude of a quantity to a specific degree of accuracy or precision is known as significant digits.

The significant figures of a measured quantity are defined as all the digits known with certainty and the first uncertain or estimated digit.

Rules for significant figures:

1. Digits from 1 to 9 are always significant and have infinite number of significant figures.

2. All non-zero numbers are always significant.

3. All zero’s between integers are always significant.

4. All zero’s preceding the first integers are never significant.

5. All zero’s after the decimal point are always significant.

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3 years ago
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