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3 years ago

8

Which are different structures of the eye? Select four options.

2 answers:

Setler [38]3 years ago

5 0

Answer:

Pupil, Cornea, Retina, and Lens

Explanation:

Drupady [299]3 years ago

3 0

Pupil, cornea, retina, lens

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What is the characteristic of the polar water molecule?

NikAS [45]

A water molecule, because of its shape, is a polar molecule. That is, it has one side that is positively charged and one side that is negatively charged. The molecule is made up of two hydrogen atoms and one oxygen atom. The bonds between the atoms are called covalent bonds, because the atoms share electrons.

7 0

4 years ago

How many moles are 7.25 x 1023 formula units of Mgo ?

romanna [79]

Answer:

<h2>The answer is option D</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

$n = \frac{N}{L} \\$

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

$n = \frac{7.25 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{7.25}{6.02} \\ = 1.2043189368...$

We have the final answer as

<h3>1.20 moles</h3>

Hope this helps you

6 0

3 years ago

If the temperature of water increases as you heat it, the temperature is the independent variable.

Simora [160]

False

becuase the temperates is dependant on heat or cold sources

5 0

3 years ago

Read 2 more answers

The properties of two elements are listed below. Which prediction is supported by the information in the table?

zaharov [31]

The first choice is correct. K will give up electrons more easily, due to its smaller electronegativity.

If this helped you, please list me as brainliest!

3 0

3 years ago

Read 2 more answers

You have a 16.0-oz. (473-mL) glass of lemonade with a concentration of 2.66 M. The lemonade sits out on your counter for a coupl

salantis [7]

<u>Answer:</u> The new concentration of lemonade is 3.90 M

<u>Explanation:</u>

To calculate the number of moles for given molarity, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}\times 1000}{\text{Volume of solution (in mL)}}$ .....(1)

Molarity of lemonade solution = 2.66 M

Volume of solution = 473 mL

Putting values in equation 1, we get:

$2.66M=\frac{\text{Moles of lemonade}\times 1000}{473}\\\\\text{Moles of lemonade}=\frac{2.66\times 473}{1000}=1.26mol$

Now, calculating the new concentration of lemonade by using equation 1:

Moles of lemonade = 1.26 moles

Volume of solution = (473 - 150) mL = 323 mL

Putting values in equation 1, we get:

$\text{New concentration of lemonade}=\frac{1.26\times 1000}{323}\\\\\text{New concentration of lemonade}=3.90M$

Hence, the new concentration of lemonade is 3.90 M

7 0

3 years ago