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3 years ago

How does the shape of a molecule predict its polarity? Polar molecules are usually:

Chemistry

1 answer:

lara [203]3 years ago

6 0

Answer:

C. Less symmetrical than non-polar.

Explanation:

If molecule is symmetrical it can contain polar bond, but sum of all polar moments are equal to zero, and therefore molecule is non-polar.

Hydrogen atom is usually very easy to "polarize", respectively to drag electron pair from it. Because of that lots of molecules that contain hydrogen atoms are polar. Of course greater role in polarity is symmetry of molecules.

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A bottle containing 415 g of cleaning solution is used to clean hospital equipment. If the cleaning solution has a specific grav

neonofarm [45]

Answer: 483 mL of the cleaning solution are used to clean hospital equipment

Explanation:

The question requires us to calculate the volume, in mL, of solution is used to clean hospital equipment, given that 415g of this solution are used and the specific gravity of the solution is 0.860.

Measurements > Density

Specific gravity is defined as the ratio between the density of a given substance to the density of a reference material, such as water:

$Specific\text{ gravity = }\frac{density\text{ of substance}}{density\text{ of reference substance}}$

The density of a substance is defined as the ratio between the mass and the volume of this substance:

$density=\frac{mass}{volume}$

Considering the reference substance as water and its density as 1.00 g/mL, we can determine the density of the substance which specific gravity is 0.860:

$0.860=\frac{density\text{ of substance}}{1.00g/mL}\rightarrow density\text{ of substance = 0.860g/mL}$

Thus, taking water as the reference substance, we can say that the density of the cleaning solution is 0.860 g/mL.

Now that we know the density of the cleaning solution (0.860 g/mL) and the mass of solution that is used to clean hospital equipment (415g), we can calculate the volume of solution that is used to clean the equipment:

$\begin{gathered} density=\frac{mass}{volume}\rightarrow volume=\frac{mass}{density} \\ \\ volume=\frac{415g}{0.860g/mL}=483mL \end{gathered}$

Therefore, 483 mL of the cleaning solution are used to clean hospital equipment.

6 0

1 year ago

What is an example of a covalent bond and why

zhenek [66]

Answer:

Water

Explanation:

Hydrogen and oxygen is bonded together to make H2O aka. water

5 0

3 years ago

How many moles does 205g of helium, He contains ?

Ne4ueva [31]

<span>Moles = weight in g / atomic weight So, moles in 40 g of He = 40 / 4 = 10 moles.</span>

7 0

3 years ago

Read 2 more answers

If temperature is increased, the number of collisions per second <br> .

Hatshy [7]

Answer

If the temperature is increased , the number of collision per second increases.

Explanation

Temperature is proportional to the average kinetic energy of a sample of a gas according to the equation PV=n R T. An increased in temperature , increases the kinetic energy of the gas particles which in turn rises the velocity of the gas particles hitting the walls of the container. The more the number of particles the higher the collision rate and greater the pressure as long as the volume of container and the temperature are constant.

7 0

4 years ago

Read 2 more answers

What coefficient should go in front of the hydrogen peroxide (H2O2 ) molecule to make the chemical equation balanced? ___ H2O2 ➞

GarryVolchara [31]

Answer:

Explanation:

H2O2 ➞ 2 H2O + O2

The reaction is currently not balanced because the number of atoms on the reactant side is not equal to that of the product side

Hydrogen

Reactant = 2 Product = 4

Oxygen

Reactant = 2 Product = 4

Adding 2 to H2O2 balances the reaction as the number of atoms of both elements are now balanced on both sides of the equation

2H2O2 ➞ 2 H2O + O2

8 0

3 years ago