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3 years ago

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What can you tell about the location of the Sun from this illustration of the Milky Way? A) It is outside of the Milky Way. B) I

t is near an outer arm of the Milky Way. C) It is on the right side of the Milky Way. D) It is within the Central Bulge of the Milky Way. Hint

1 answer:

MakcuM [25]3 years ago

7 0

It is within the central bulge

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Chlorine pentafluoride gas is collected at -17.0 °C in an evacuated flask with measured volume of 35.0 L. When all the gas has b

Svet_ta [14]

Answer:

1. The mass of Chlorine pentafluoride, ClF5, is 39.16g

2. The number of mole of Chlorine pentafluoride, ClF5, is 0.3mole

Explanation:

1. To solve the mass of Chlorine pentafluoride, ClF5, first, let us calculate the molar mass of ClF5. This is illustrated below:

Molar Mass of ClF5 = 35.5 + (5 x 19) = 35.5 + 95 = 130.5g/mol

From the ideal gas equation:

PV = nRT (1)

Recall:

Number of mole(n) = mass (m) /Molar Mass(M)

n = m/M

Now substituting the value of n in equation 1, we have:

PV = nRT

PV = mRT/M

Now we can obtain the mass of Chlorine pentafluoride ClF5 as follow:

Data obtained from the question include:

T (temperature) = -17.0 °C = - 17 + 273 = 256K

V (volume) = 35L

P (pressure) = 0.180 atm

R (gas constant) = 0.082atm.L/Kmol

m (mass of Chlorine pentafluoride) =?

M (molar mass of Chlorine pentafluoride) = 130.5g/mol

PV = mRT/M

0.180 x 35 = m x 0.082 x 256/ 130.5

Cross multiply to express in linear form as shown below:

m x 0.082 x 256 = 0.180x35x130.5

Divide both side by 0.082 x 256

m = (0.180x35x130.5) /(0.082x256)

m = 39.16g

Therefore, the mass of Chlorine pentafluoride, ClF5, is 39.16g

2. The number of mole of ClF5 can be obtained as follow:

Mass of ClF5 = 39.16g

Molar Mass of ClF5 = 130.5g/mol

Mole of ClF5 =?

Number of mole = Mass /Molar Mass

Mole of ClF5 = 39.16/130.5g

Mole of ClF5 = 0.3mole

8 0

3 years ago

Read 2 more answers

Which of these relationships is true of an uncharged atom?

marusya05 [52]

Answer:

The correct option is C) The number of protons is equal to the number of electrons.

Explanation:

Atoms are made up of particles called protons, neutrons, and electrons. Protons and neutrons are in the center of the atom and form the nucleus, while electrons surround the nucleus. Electrons have a negative charge. The charge of the protons is positive and finally, the neutrons have no charge.

If the atom has no charge, this means that the total charge of the atomic nucleus, which is positive due to the presence of the protons, is equal to the negative charge of the electrons, so that it cancels out.

So, <u><em>the correct option is C) The number of protons is equal to the number of electrons.</em></u>

7 0

3 years ago

All organic compound soluble in WATEe and conduct electrically

Delvig [45]

No

Explanation:

Not all organic substances are soluble in water and will not conduct electricity. Only polar organic compounds are soluble in water and will conduct electricity.

The general rule of solubility is that like dissolves likes.
Polar compounds will only dissolve other polar compounds too. Water is a polar solvent.
Non-polar compounds will only dissolve in non-polar compounds too.
Since water is a polar organic compound, only polar organic compounds will dissolve in it.
Not all organic compounds are polar.
When a compound dissolves in water, it produces ions that makes it able to conduct electricity.
Fats and oil are insoluble in water

learn more:

Inorganic compounds brainly.com/question/5047702

#learnwithBrainly

4 0

3 years ago

If an unknown substance CANNOT be broken down into simpler substances, it is

lisov135 [29]

The correct answer is b. an element

The explanation:

when the ELEMENT is define as substance that cannot be decomposed (broken down) into simpler substances by ordinary chemical means. Examples: gold, iron, carbon, hydrogen, oxygen, nitrogen

Ex: diamond will be broken into carbon as well.

and SUBSTANCE: Material composed of only one kind of matter throughout (same atoms or same molecules).

5 0

3 years ago

What features make a question scientific, and why are some questions beyond the boundaries of scientific investigation? Be sure

Pavel [41]

What makes a question scientific is that we are able to test our hypothesis.

For example: Will increased sunlight cause more seeds to grow. We can test that simply by placing seeds in the sun and some out of the sun.

If you cannot test an hypothesis, then it is NOT scientific

For example: Macroevolution isn't a scientific question because we cannot test whether or not complex organisms come from simpler organisms. It can only be classified as an Hypothesis at best.

5 0

3 years ago