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3 years ago

Which statement about Niels Bohr’s atomic model is true?

Chemistry

1 answer:

jenyasd209 [6]3 years ago

4 0

Answer:

Each orbit has a specific energy level.

Would you mind marking it the brainliest:).

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Draw the structure for cis-2,3-dibromo-2-hexene.

padilas [110]

First, draw the 2-hexene. Th is is a molecule of six carbons with a double bond in the second carbon:

      CH3 - CH = CH2 - CH2 - CH2 - CH3

Secong, put one Br on the second carbon and one Br on the third carbon:

    CH3 - CBr = CBr - CH2 - CH2 - CH3

Third, cis means that the two Br are placed in opposed positions, this is drawn with one Br up and the other down. So, you need to represent the position of the Br in the space:

      H   Br        H    H      H
       |    |           |       |    |
H - C - C = C - C - C - C - H
       |           |    |       |    |
      H          Br H     H      H

The important fact to realize is that the two Br are in opposed sides of the molecule.

4 0

3 years ago

Read 2 more answers

A sample of helium gas occupies a volume of 152.0 mL at a pressure of 717.0 mm Hg and a temperature of 315.0 K. What will the vo

kozerog [31]

Answer:

0.581 L or 581 mL

Explanation:

As stated in the question, the combined gas law is (P1*V1/T1) = (P2*V2/T2)

Write down the amounts you are given.

V1 = 0.152 L (I was taught to always convert milliliters to liters)

P1 = 717 mmHg

T1 = 315 K

V2 = ?

P2 = 463 mmHg

T2 = 777 K

The variable that is being solved for is final volume. Fill in the combined gas law equation with the corresponding amounts and solve for V2.

(717 mmHg*0.152 L) / (315 K) = (463 mmHg*V2) / (777 K)

0.346 = (463*V2) / (777)

0.346*777 = (463*V2) / (777)*777

268.842 = 463*V2

268.842/463 = (463*V2)/463

V2 = 0.581

Pressure and volume are indirectly proportional. This checks out because the volume increased while pressure decreased. Volume and temperature are directly proportional. This checks out because both volume and temperature increased. This is a good way to check your answers. You can also solve each side of the combined gas law equation to see if they are both the same.

6 0

3 years ago

How is the atomic mass of an element related to a mole?

Luden [163]

Answer:

i the answer to your question should be C

Explanation:

Hope this helps!

4 0

2 years ago

Two gases, helium and X, are released from one end of an evacuated long cylinder at the same time. If it takes the helium atoms

Greeley [361]

Answer:

The correct answer is HOF gas.

Explanation:

Based on the given information, the helium atoms effuses three times faster in comparison to the gas X.

The rate of effusion is determined by,

r is inversely proportional to 1/√M, here M is the molecular mass of the gas.

and r is inversely proportional to 1/t, here t is the time taken for effusion.

Thus, t is directly proportional to √M

The molecular mass of He is 4.

tHe = tX/3 (Here tx is the time taken for gas X)

The molecular mass of X is not known.

tX/tHe =√Mx/MHe

3 = √Mx/4

By squaring both the sides we get,

9 = Mx/4

Mx = 36

36 is the molecular mass of gas HOF, that is, (1+16+19 = 36). Hence, the gas X is 36.

4 0

3 years ago

Large amounts of energy are required in order to join two atom's nuclei into a single nucleus and, in turn, create a new element

Rainbow [258]

A) combining because you need to combine all elements together

7 0

3 years ago

Read 2 more answers