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stellarik [79]
3 years ago
7

What body systems help when taking a test

Biology
1 answer:
masha68 [24]3 years ago
4 0
Sorry if I’m wrong but I believe it’s the cardiovascular and lymphatic system

Hope this helps!
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You are traveling on the interstate highway at a speed of
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65 times 1.6.

answer... 104

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What structure carries urine from the kidney to the bladder?
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Ureter, the structure that carries urine from the kidney to the bladder is called Ureter
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predict the shape of a population growth curve for a game park in which a male and female rhinoceros are released
FromTheMoon [43]
Nearly flat. Rhinos don't really reproduce rapidly.
7 0
3 years ago
Which describes the Dewey Decimal system
GaryK [48]

Answer:

Option 2, or B: a way of classifying books

Explanation:

Dewey Decimal system definition = The Dewey Decimal Classification (DDC), colloquially the Dewey Decimal System, is a proprietary library classification system first published in the United States by Melvil Dewey in 1876.

What is the Dewey Decimal system? Well, the definition says it is a proprietary library classification system.

So..

Our answer is 2 or B: a way of classifying books.

Hope this helps!

- Melanie

8 0
3 years ago
How many grams are NaCl are required to prepare 200 mL of a 3.10 M solution?
rodikova [14]

The mass (in grams) of NaCl required to prepare the solution is 36.27 g

<h3>What is molarity?</h3>

Molarity is defined as the mole of solute per unit litre of solution. Mathematically, it can be expressed as:

Molarity = mole / Volume

<h3>How to determine the mole of NaCl</h3>
  • Volume = 200 mL = 200 / 1000 = 0.2 L
  • Molarity = 3.1 M
  • Mole of NaCl =?

The mole of NaCl in the solution can be obtained as follow:

Molarity = mole / Volume

Cross multiply

Mole = Molarity x Volume

Mole of NaCl = 3.1 × 0.2

Mole of NaCl = 0.62 mole

<h3>How to determine the mass of NaCl </h3>

We can obtain the mass of NaCl needed to prepare the solution as follow:

  • Molar mass of NaCl = 58.5 g/mol
  • Mole of NaCl = 0.62 mole
  • Mass of NaCl = ?

Mole = mass / molar mass

Cross multiply

Mass = mole × molar mass

Mass of NaCl = 0.62 × 58.5

Mass of NaCl = 36.27 g

Learn more about molarity:

brainly.com/question/15370276

#SPJ1

6 0
2 years ago
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