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3 years ago

How many atoms are in 2.45 moles of hydrogen

Chemistry

1 answer:

allochka39001 [22]3 years ago

6 0

Answer:

There are 1.4754246675000002e+24 atoms of Hydrogen within the measurement of 2.45 moles of hydrogen!

Explanation:

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Question 4 Unsaved When writing electron configuration the 3d block comes after the 4s block. Question 4 options: True False

zmey [24]

Answer:

True

Explanation:

According to Aufbau's principle "sublevels with lower energies are filled up before those with higher energies".

Sublevels do not fill up in numerical order but there is a certain manner in which they are filled. The pattern is shown below:

1s 2s 2p 3s 3p 4s 3d 4p 5s 4d 5p e.t.c

We see that the 4s gets filled before the 3d sublevel.

6 0

3 years ago

How many grams of sodium are needed to produce 12.5g of sodium oxide

Hatshy [7]

Answer:

25 possibly

Explanation:

I'm not too sure about this, but sodium oxide is Na2O, 2 sodium and 1 oxygen, so 12.5g * 2 is 25

If someone else comes up with a more convincing argument listen to them

4 0

3 years ago

Please help thank you

maxonik [38]

Answer:

$K=1.7x10^{-3}$

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to solve this problem by firstly setting up the equilibrium expression for the given reaction, in agreement to the law of mass action:

$K=\frac{[NO]^2}{[N_2][O_2]}$

Next, we plug in the given concentrations on the data table to obtain:

$K=\frac{(0.034)^2}{(0.69)(0.98)}\\\\K=1.7x10^{-3}$

Regards!

5 0

2 years ago

Because of the way Saturn is tilted, the planet experiences four different seasons. If each of the four seasons lasts an equal a

nalin [4]

Answer:

Saturn's orbit is 29.5 "Earth years" and if Saturn's four seasons last an equal amount of time, the approximate length would be 29.5 / 4

29.5 / 4 = 5.9

So each season on Saturn is 5.9 "Earth years" Long.

7 0

2 years ago

Please help I need to draw and label a atom that has 7 protons and 8 neutrons!!!! I will give a brainly

Galina-37 [17]

Answer:

Oxygen

Explanation:

Given the following question:

The following atom has 7 protons (plus charge)
The following atom has 8 neutrons (negative charge)
The following atom has 7 electrons since the number of electrons are equal to the number of protons the atom has.

The following atom is oxygen with a mass number of 16: (see photo below)
Let the red represent protons...
Let the gray represent the neutrons...
Let the blue represent the electrons...

Hope this helps.

6 0

2 years ago