Fill in the missing in information: (protons, electrons, atomic#, or

Water is an essential molecule to life on Earth. Which of the following is not a property of water that is critical to biologica

Musya8 [376]

I believe it will be A. Density, temperature, and viscosity, can be found in water through tests. Hope this helps! Mark as brainly please!

7 0

2 years ago

How to differ mixture and compound? What are their differences?

Roman55 [17]

Explanation:

"Compound: A substance that is made up of more than one type of atom bonded together.

Mixture: A combination of two or more elements or compounds which have not reacted to bond together; each part in the mixture retains its own properties."

- Libre Texts

8 0

2 years ago

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What are the four functions of cell division?

Softa [21]

Answer:

Cellular division has three main functions: (1) the reproduction of an entire unicellular organism, (2) the growth and repair of tissues in multicellular animals, and (3) the formation of gametes (eggs and sperm) for sexual reproduction in multicellular animals.

6 0

3 years ago

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Calculate the liters of a 4.40 M KCl solution to obtain 0.200 mole of KCI

Yuki888 [10]

Answer:

$\boxed {\boxed {\sf 0.0455 \ L}}$

Explanation:

We are asked to calculate the liters given the molarity and moles in a solution.

Molarity is a measure of concentration in moles per liter. It is calculated with the following solution:

$molarity= \frac{moles \ of \ solute}{liters \ of \ solution}$

The molarity of the solution is 4.40 molar of potassium chloride (KCl). 1 molar is equal to 1 mole per liter, so the molarity is also 4.40 moles of potassium chloride per liter. There are 0.200 moles of potassium chloride or solute. The liters of solution is unknown, so we can use the variable x.

molarity= 4.40 moles KCl / L
moles of solute = 0.200 mol KCl
liters of solution = x

$4.40 \ mol \ KCl/ L = \frac{ 0.200 \ mol \ KCl}{x}$

Since we are solving for x, we must isolate the variable. First, cross multiply. Multiply the first numerator by the second denominator, then the first denominator and the second numerator.

$\frac {4.40 \ mol \ KCl/ L}{1} = \frac{ 0.200 \ mol \ KCl}{x}$

$4.40 \ mol \ KCl / L * x= 1 * 0.200 \ mol \ KCl$

$4.40 \ mol \ KCl / L * x= 0.200 \ mol \ KCl$

x is being multiplied by 4.40 moles of potassium chloride per liter. The inverse operation of multiplication is division. Divide both sides by 4.40 mol KCl/L

$\frac {4.40 \ mol \ KCl / L * x}{4.40 \ mol \ KCl / L}= \frac {0.200 \ mol \ KCl}{{4.40 \ mol \ KCl / L}}$

$x= \frac {0.200 \ mol \ KCl}{{4.40 \ mol \ KCl / L}}$

The units of moles of potassium chloride cancel.

$x= \frac {0.200}{{4.40 L}}$

$x= 0.0454545454545 \ L$

The original measurements of liters and moles have 3 significant figures, so our answer must have the same. For the number we calculated, that is the ten-thousandth place (0.0454545454545). The 5 to the right of this place (0.0454545454545) tells us to round the 4 up to a 5.

$x \approx 0.455 \ L$

There are approximately <u>0.455 liters</u> in a 4.40 molar solution with 0.200 moles of solute.

6 0

2 years ago

Aluminum foil is often incorrectly termed tin foil. If the density of tin is 7.28g/cm³,what is the thickness of a piece of tin f

serious [3.7K]

To answer this question, you should first find the volume:7.28 g/ mL x .655 g / v = 0.08997 mL
volume = L x W x H, but thickness is the width. So rearranging the formula, the formula is v / l x h.
The thickness is found after dividing the volume by its length and width:
.08997 / (5.70) (4.25) = .004 cm is the thickness.

8 0

2 years ago

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