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Questions and Answers
Which of the following represents the correct format for expressing a quantity in scientific notation?
Which of the following represents the correct format for expressing a quantity in scientific notation?
- $a \times 10^n$, where 0 < a < 10 and n is a positive integer
- $a \times 10^n$, where 1 ≤ a < 10 and n is an integer (correct)
- $a \times 10^n$, where a > 1 and n is a negative integer
- $a \times 10^n$, where a ≥ 1 and n is any real number
Convert 0.00028 into scientific notation.
Convert 0.00028 into scientific notation.
- $2.8 \times 10^{-5}$
- $2.8 \times 10^{-4}$ (correct)
- $2.8 \times 10^{4}$
- $2.8 \times 10^{5}$
What does the term 'entidades elementales' refer to in the context of chemistry?
What does the term 'entidades elementales' refer to in the context of chemistry?
- Complex organic molecules
- Mixtures of different chemical compounds
- Fundamental particles such as atoms, molecules, and ions (correct)
- Large structures in organic chemistry
When using a scientific calculator, which function is typically used to enter numbers in scientific notation?
When using a scientific calculator, which function is typically used to enter numbers in scientific notation?
Evaluate: $\frac{10^4}{10^4}$.
Evaluate: $\frac{10^4}{10^4}$.
Simplify the expression: $(7.5 \times 10^9) \times (4.932 \times 10^{-4})$
Simplify the expression: $(7.5 \times 10^9) \times (4.932 \times 10^{-4})$
Calculate: $(3.971 \times 10^8) \times (1.7 \times 10^{-8})$
Calculate: $(3.971 \times 10^8) \times (1.7 \times 10^{-8})$
What is the result of $(5.908 \times 10^{24}) \times (8.9 \times 10^{-10})$ in scientific notation?
What is the result of $(5.908 \times 10^{24}) \times (8.9 \times 10^{-10})$ in scientific notation?
What is the result of $(1.903 \times 10^5) \times (9.5 \times 10^{-5})$?
What is the result of $(1.903 \times 10^5) \times (9.5 \times 10^{-5})$?
If a population is reported as $8.0 \times 10^9$ people, how would you express this number in standard notation?
If a population is reported as $8.0 \times 10^9$ people, how would you express this number in standard notation?
What is the order of operations that needs to be followed while using scientific notation?
What is the order of operations that needs to be followed while using scientific notation?
How would you represent $2.8 \times 10^{-4}$g using scientific calculator?
How would you represent $2.8 \times 10^{-4}$g using scientific calculator?
Approximately, how many entities elementary are in 2 moles?
Approximately, how many entities elementary are in 2 moles?
Which one of the followings is a limitation of using scientific notation?
Which one of the followings is a limitation of using scientific notation?
Why is using scientific notation important in scientific field?
Why is using scientific notation important in scientific field?
If Avogadro's number are $6.02 \times 10^{23}$, approximately how many entities elemenatry are in 0.5 mol?
If Avogadro's number are $6.02 \times 10^{23}$, approximately how many entities elemenatry are in 0.5 mol?
Which one of the followings is an advantage of using degree mode (Deg) on a scientific calculator?
Which one of the followings is an advantage of using degree mode (Deg) on a scientific calculator?
Why is important to set the Mode in Deg when using a scientific calculator?
Why is important to set the Mode in Deg when using a scientific calculator?
How did the scientific notation changed scientific practices?
How did the scientific notation changed scientific practices?
Complete: In scientific notation, the decimal point is placed after the first ___ digit.
Complete: In scientific notation, the decimal point is placed after the first ___ digit.
Flashcards
Scientific Notation
Scientific Notation
A way to express very large or very small numbers as a number between 1 and 10 multiplied by a power of 10.
1 mole
1 mole
Avogadro's number, representing the number of entities (atoms, molecules, ions, etc.) in one mole of a substance.
Calculator Use
Calculator Use
It simplifies calculations with very large or small numbers. Use the EXP button.
10^n / 10^n
10^n / 10^n
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Study Notes
- Scientific notation expresses any quantity: $a \times 10^n$
- Where $a$ is greater or equal to 1
- And $a$ is less than 10
- Where $n$ is an integer that can be positive or negative
- Example: 8,000,000,000.0 inhabitants is written as 8.0 x 10^9 inhabitants
- 1 mol = 6.02 x 10^23 elemental entities, like atoms, molecules, ions, etc.
- 2 x 6.02 x 10^23 = 1.204 x 10^24
Calculator Scientific Notation Usage
- For 8.0 x 10^9, enter 8, then EXP, then 9 on the calculator.
- To solve 6.02 x 10^23 - 8.0 x 10^9, the second term is negligible: 6.02 x 10^23 - 6.02 x 10^20 = 6.01398 x 10^23
- Example calculations:
- (1.5 x 10^9) x (4.932 x 10^-4) = 7,398
- (3.971 x 10^3) x (1.7 x 10^-3) = 6.7507
- (5.908 x 10^24) x (8.9 x 10^-16) = 5.25872 x 10^9
- (7.903 x 10^3) x (9.5 x 10^-5) = 78.0785
- 10^4 / 10^4 = 10^(4-4) = 1
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