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2 years ago

Suppose that 55% of the approximately 4,000 school-aged children in the county have vitamin deficiency.

SAT

2 answers:

kakasveta [241]2 years ago

8 0

Answer: A

The samples are not independent of each other.

Explanation: Khan Answer

They are testing the same sample of students both times. Results from the first test would likely give us information about the results from the second test.

kherson [118]2 years ago

3 0

Answer:

The samples are not independent of each other.

Explanation:

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Caleb draws two triangles and claims that the triangles are congruent.

Mariulka [41]

Answer:

your question needs more description or an image. I'll help if you comment the rest of the question.

Explanation:

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2 years ago

How do you use the term “demoralizing” in a racial profiling essay?

Anton [14]

Maybe talk about how racial profiling is demoralizing because it breaks the spirit of those affected

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2 years ago

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

Elza [17]

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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2 years ago

Some students believe that teachers are full of hot air. if i inhale 2.2 liters of gas at a temperature of 180 c and it heats to

Alex_Xolod [135]

Answer:

yes

Explanation:

yes

5 0

1 year ago

- A box contains only blue and black glass

Tomtit [17]

Answer:

Explanation:

Blue beads are 3 times more likely to be pulled. Therefore, since there are 12 beads in total the ratio which would fit the ratio of probability to pull blue beads compared to black beads would be 9/12 leaving 3/12 probability to pull a black bead. if you simplify the fractions you get 3/4 and 1/4 where 1/4 (the probability to pull a black bead) is three times less than the probability to pull a blue bead.

3 0

3 years ago