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valina [46]
3 years ago
8

The total cost of 30 identical erasers is y dollars. At this rate, what is the total cost in dollars of 70 of these erasers in t

erms of y
SAT
1 answer:
Sergeu [11.5K]3 years ago
3 0
2 & 1/3 y
Lemme know if I was right :)
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Choose the best statement that best explains the importance of root systems of grass in the prairie? Root system provides food f
ludmilkaskok [199]

Answer:

It's B or Root system provides continuous growth for grass in the future.

Explanation:

This is the correct one because this is the only option that talks about grass in the first place.

A. Talks about providing food to customers.

B. Talks about providing continuous growth for grass.

C. Talks about providing water for animals.

D. Talks about giving shelter to small animals.

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Which of the following describes the mechanical efficiency of a machine?
liubo4ka [24]
C. It is always less than 100%
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Anions tend to have a __________ charge and cations tend to have a __________ charge.
hoa [83]

Answer: Negative, Positive

Explanation:

Cations lose electrons to get a positive charge, while anions gain electrons to get a negative charge.

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3 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>

8 0
2 years ago
What does data warehousing allow organizations to achieve brainly.
Snezhnost [94]

Through data warehousing historical data that can be easily retrieved and analyzed to help improve the organization's operations.

Data warehousing is an electronic representation of information. It refers to organizing, analyzing, and reporting information electronically.

Organizations use data warehousing to store their information electronically so that historical data that can be easily retrieved and analyzed to help improve the organization's operations.

Find out more at: brainly.com/question/8897139

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