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kogti [31]
2 years ago
5

A data set is summarized in the frequency table below. Using the table, determine the number of values greater than or equal to

8. Give your answer as a single number. For example if you found the number of values was 33, you would enter 33. Value Frequency 1 1 2 2 3 1 4 2 5 2 6 3 7 4 8 4 9 6 10 8 11 4 12 5
Chemistry
1 answer:
swat322 years ago
4 0

The number of values greater than or equal to 8  is  mathematically given as

x = 27

This is further explained below.

<h3>What is a data set?</h3>

Generally, Simply put, data sets are groups of information. When dealing with tabular information, a data set is analogous to one or more database tables, where each column represents a different variable and each row represents a separate record.

In conclusion, the total amount of numbers that are either more than or equal to 8

Data value 8 is only exceeded by 9, 10, 11, and 12.

  • 8 occurs 4 times
  • 9 occurs 6 times
  • 10 occurs 8 times
  • 11 occurs 4 times
  • 12 occurs 5 times

Hence

x= 4+6+8+4+5

x = 27

Read more about data set

brainly.com/question/22210584

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A student is asked to standardize a solution of potassium hydroxide. He weighs out 1.08 g potassium hydrogen phthalate (KHC8H4O4
natka813 [3]

Answer:

A. 0.143 M

B. 0.0523 M

Explanation:

A.

Let's consider the neutralization reaction between potassium hydroxide and potassium hydrogen phthalate (KHP).

KOH + KHC₈H₄O₄ → H₂O + K₂C₈H₄O₄

The molar mass of KHP is 204.22 g/mol. The moles corresponding to 1.08 g are:

1.08 g × (1 mol/204.22 g) = 5.28 × 10⁻³ mol

The molar ratio of KOH to KHC₈H₄O₄ is 1:1. The reacting moles of KOH are 5.28 × 10⁻³ moles.

5.28 × 10⁻³ moles of KOH occupy a volume of 36.8 mL. The molarity of the KOH solution is:

M = 5.28 × 10⁻³ mol / 0.0368 L = 0.143 M

B.

Let's consider the neutralization of potassium hydroxide and perchloric acid.

KOH + HClO₄ → KClO₄ + H₂O

When the molar ratio of acid (A) to base (B) is 1:1, we can use the following expression.

M_{A} \times V_{A} = M_{B} \times V_{B}\\M_{A} = \frac{M_{B} \times V_{B}}{V_{A}} \\M_{A} = \frac{0.143 M \times 10.1mL}{27.6mL}\\M_{A} =0.0523 M

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3 years ago
How many moles are in 42.1 grams of NaCl?​
vovikov84 [41]

Answer:

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= 58.5

1 mole means molecular mass (in gram)

In 58.5 gm NaCl there is 1 mole.

So, 42.1 gm NaCl contains 42.1/58.5 =0.71 moles.

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3 years ago
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