4 years ago

If h is written in scientific notation but its coefficient is not 1, what do you need to calculate ph

Chemistry

1 answer:

Darya [45]4 years ago

4 0

Are there any options for this question

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The initial volume of a gas is 21 L and the final volume is 38.7 L. If the initial temperature was 261 K, what is the final temp

QveST [7]

Answer:

480.9K

Explanation:

V1=21L

V2=38.7L

T1=261K

T2=?

Using Charles law,

V1/T1=V2/T2

Inputting the given values,

21/261=38.7/T2

T2=480.9K

3 0

3 years ago

What is wrong with the chemical equation below? How could you fix it? CH4 + O2 → CO2 + 2 H2O

Ipatiy [6.2K]

CH4+O2 = CO2+2H2O

C-1 C-1

O-2 O-4

H-4 H-4

CH4+2 O2 = CO2+2 H2O

C-1 C-1

O-2-4 O-4

H-4 H-4

You add a 2 in front of the O2 on the reactant side so the Oxygen can balance on the Product side

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4 years ago

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Lightning is caused by the build-up of and subsequent striking of electrons against the ground. Is a lightning bolt striking the

IgorLugansk [536]

Answer:

Kinetic

Explanation:

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3 years ago

The Moon is made up mostly of _______, similar to minerals on Earth. A. rilles B. lunar breccia C. silicates D. oxides

Dafna1 [17]

The Moon is made up mostly of "Silicates" similar to minerals on Earth

Hope this helps!

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3 years ago

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Determine the energy released when an electrons transitions from n =3 to n = 2

stealth61 [152]

Answer:

e. none of the above.

Explanation:

Hello there!

In this case, according to the Rydberg's equation for the calculation of energy during electron transitions:

$E=R(\frac{1}{n^2_{final}} -\frac{1}{n^2_{initial}} )z^2$

In such a way, we may assume that this element is H so z=1m the final energy level is 2 and the initial one is 3; thus, we plug in the values, and the Rydberg's constant to obtain:

$E=2.178^{-18}J(\frac{1}{2^2}} -\frac{1}{3^2} )1^2\\\\E=3.03x10^{-19}J$

Thus, the answer is e. none of the above because the exponent is not given correctly.

Regards!

3 0

3 years ago