Chemistry, 18.11.2019 16:31, wwesuplexcity28

Express in scientific notation. make sure your answer has the same number of significant figures as the starting value. (1.8 x 10-2) ÷ (9 x 102) =

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answered: lionessny6301

The result of division (1.8 x 10⁻²) ÷ (9 x 10²) is 2.10⁻⁵ (cause the result must have 1 significant number)

Further Explanation

Significant numbers are obtained from measurement results of exact numbers and the last number estimated

This is called significant numbers

The scientific notation can be described as:

a, ... x 10ⁿ

where the power of n is an integer, and the coefficient a is a real number

Rules for significant numbers in general:

1. All non-zero numbers are significant numbers2. a zero which is located between two non-zero numbers including a significant number3. all zeros are located in the final row written behind the decimal point of the include significant number4. zero decimal point is the not significant number5. In multiplication and division of important numbers, the final results look at the least number of significant numbers.

In the question, it is known that

(1.8 x 10⁻²) ÷ (9 x 10²) has 2(1.8) and 1(9) significant numbers, so the division of both produces 1 significant number

So that we did the significant number then proceed with rank number

1. Division of siginificant numbers

1.8: 9 = 0.2

2. Division of rank numbers

10⁻²: 10² = 10⁻⁴

So the result = 0.2.10⁻⁴

In the form of scientific notation, it becomes: 2.10⁻⁵

The result has one significant number, which is number 2

Learn more

the number of significant figures

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the result of multiplying of significant numbers

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Compute 4,659 × 104−2.14 × 104.

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Keywords: the scientific notation, significant number

Express in scientific notation. make sure your answer has the same number of significant figures as

answered: Guest

For cyclohexane compounds drawn in a chair conformation: -axial bonds are vertical -equatorial bonds are parallel to two bonds within the ring. thus, as i assume the chair conformation is drawn: -the x group is in an axial position, as are the five other vertical bonds. -three axial bonds are on the top face of the ring -the other three axial bonds are on the bottom face the position of the second substituent on each ring carbon is equatorial. gauche groups must be on an adjacent carbon such as carbon 6 and carbon 2, and also gauche groups are rotated by 60 degrees relative to each other. drawing the newman projections for c1–c2 and c1–c6 aids in visualizing the groups that are gauche to the y group on c1. click this link and watch some academic videos that may you more understand the topic

answered: Guest

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