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stiv31 [10]
3 years ago
9

Using the bar chart, what percent of the population studied has either 2 or 3 cars?

SAT
1 answer:
PtichkaEL [24]3 years ago
4 0
It is D
What you need to do is find the total of people which is 303.
then you do the 3 rule
100% = 303
x% = 215 (add the people who have 2 or 3 cars)
210*100/303=70.9%
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If 50. 0 g of ch₃oh (mm = 32. 04 g/mol) are added to a 500. 0 ml volumetric flask, and water is added to fill the flask, what is
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Taking into account the definition of molarity, the concentration of CH₃OH in the solution is 3.12 \frac{moles}{liters}.

<h3>Definition of molarity</h3>

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

Molarity=\frac{number of moles}{volume}

Molarity is expressed in units \frac{moles}{liters}.

<h3>Concentration of CH₃OH</h3>

In this case, you know:

  • number of moles= 50 g× \frac{1 mole}{32.04 g}= 1.56 moles, being 32.04 \frac{g}{mole} the molar mass of CH₃OH
  • volume= 500 mL= 0.5 L (being 1000 mL= 1 L)

Replacing in the definition of molarity:

Molarity=\frac{1.56 moles}{0.500 L}

Solving:

<u><em>Molarity= 3.12 </em></u>\frac{moles}{liters}

Finally, the concentration of CH₃OH in the solution is 3.12 \frac{moles}{liters}.

Learn more about molarity:

<u>brainly.com/question/9324116</u>

<u>brainly.com/question/10608366</u>

<u>brainly.com/question/7429224</u>

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If you were blacklisted during the Red Scare, you would not be able to find work in the entertainment industry.

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This was a time in the 1950s where people were increasingly worried that Communists had inflitrated America and were plotting a takeover.

When people were blacklisted for being involved in Communist activity, they would be unable to find employment in entertainment as people wanted to avoid their bad publicity.

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aivan3 [116]

The option that is an accurate statement about Sample Size is; A: A larger sample size is needed for increased accuracy.

<h3>What is true about Sample Size?</h3>

Sample size determination is the act of choosing the number of observations or replicates to include in a statistical sample. The sample size is an important feature of any empirical study in which the goal is to make inferences about a population from a sample.

Now, the smaller the sample size, the lesser the accuracy as you have possibility of biased research from just a handful of people. However, the larger the sample, the greater the degree of accuracy of the research.

Thus, we can say that the option that is an accurate statement about Sample Size is; A: A larger sample size is needed for increased accuracy.

Complete question is;

Which of the following is an accurate statement about sample size?

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