3 years ago

Which is an example of kinetic energy?

Chemistry

2 answers:

masya89 [10]3 years ago

4 0

Answer:

Explanation:

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professor190 [17]3 years ago

4 0

I m not sure ...........................

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What does the symbol H stand for

muminat

Answer:

enthalpy

Explanation:

If it is used with a triangle in front, (delta H), that means the change in enthalpy. Delta H= (m)(s)(Delta T). m=mass of products, s=heat of the products, Delta T = change in temperature.

Hope that helps

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3 years ago

One of the emission spectral lines for Be3+ has a wavelength of 253.4 nm for an electronic transition that begins in the state w

4vir4ik [10]

Answer:

Explanation:

Relationship between wavenumber and Rydberg constant (R) is as follows:

$wave\ number=R\times Z^2\frac{1}{n_1^2} -\frac{1}{n_1^2}$

Here, Z is atomic number.

R=109677 cm^-1

Wavenumber is related with wavelength as follows:

wavenumber = 1/wavelength

wavelength = 253.4 nm

$wavenumber=\frac{1}{253.4\times 10^{-9}} \\=39463.3\ cm^{-1}$

Z fro Be = 4

$39463.3=109677\times 4^2(\frac{1}{n_1^2} -\frac{1}{5^2})\\39463.3=109677\times 16(\frac{1}{n_1^2} -\frac{1}{5^2})\\n_1=4$

Therefore, the principal quantum number corresponding to the given emission is 4.

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3 years ago

Which is a substance that is made up of only one type of atom?

deff fn [24]

The answer is element

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2 years ago

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Look at the diagram of Woese’s modern system of classification.

Paha777 [63]

So buddy the answer to this studying u feel me become smart like me

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The electron configuration 1sÆ 2sÆ2pÒ 3sÆ3pÒ represents which noble gas?

ch4aika [34]

This noble gas is argon (Ar), because its third energy level is full.

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2 years ago