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4 years ago

Is my answer correct

Chemistry

1 answer:

Lapatulllka [165]4 years ago

7 0

Yes Lithium sulfide (Li2S) would have 2 lithium atoms for every sulfur atom and would form an ionic bond. Sodium oxide (Na2O) has 2 sodium atoms for every oxygen atom (same ratio) and forms an ionic bond

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The temperature of 500 mL of water is 16°C what happens to the water when thermal energy is transferred to it

Lunna [17]

Answer:

The temperature of the water increases because the average

kinetic energy of the water molecules increases.Explanation:

3 0

3 years ago

Determine the end (final) value of n in a hydrogen atom transition, if the electron starts in and the atom emits a photon of lig

Usimov [2.4K]

Complete Question

Determine the end (final) value of n in a hydrogen atom transition, if the electron starts in n=4 and the atom emits a photon of light with a wavelength of 486 nm. Group of answer choices

Answer:

$n=2$

Explanation:

From the question we are told that:

Wavelength $\lambda=486nm=>486*10^{-9}$

Generally the equation for Atom Transition is mathematically given by

$\frac{1}{\lambda}=R_{\infty }(\frac{1}{n_1^2}-\frac{1}{n_2^2})$

Where

Rydberg constant $R_{\infty}=1.097*10^7$

Therefore

$\frac{1}{486*10^{-9}}=1.097*10^7*(\frac{1}{n_1^2}-\frac{1}{4^2})$

$(\frac{1}{n_1^2}-\frac{1}{4^2})=\frac{1}{486*10^{-9}*1.097*10^7}$

$n_1^2=3.98$

$n=1.99$

$n=2$

6 0

3 years ago

Give the name of the following molecule. EXTRA POINTS PLEASE HELP

Rudik [331]

There isn t a 'middle' carbon because there is an even number of them

If the methyl group braches off the 3rd carbon the name is

hexa-3-methyl-3-ene

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3 years ago

If you hold a box with a mass of 50kg for 5 hours how much work have you done

lubasha [3.4K]

No work , because the object was not pushed,pulled,dropped,or picked up

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3 years ago

What is the mass of 1 mole of lithium?

Korolek [52]

Answer: The mass of 1 mole of lithium is 6.941 grams.

Explanation:

To calculate the mass of a compound or element, we use the formula used to calculate the number of moles: