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2 years ago

How many moles are in 20 grams of O₂ gas?

Chemistry

1 answer:

Dima020 [189]2 years ago

4 0

20 g O2 x 1 mol O2/32 g O = 0.625 mol O2

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If this container of liquid water was frozen into ice and then, thawed back into liquid what would the volume be?

Dmitry_Shevchenko [17]

Answer:

Explanation:

because it's is still the same amount even if you freeze it

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3 years ago

Which of the following is a measure of velocity?

padilas [110]

The correct answer is 30 seconds

6 0

3 years ago

Read 2 more answers

What are the n, l, and possible ml values for the 2p and 5f sublevels?

elixir [45]

Answer:

1. 2p sublevels, n = 2, orbital p, l = 1, ml = 0, ±1

2. 5f sublevels n = 5, orbital f, l = 3, ml = 0, ±1, ±2, ±3

Explanation:

The rules for electron quantum numbers are:

1. Shell number, 1 ≤ n

2. Subshell number, 0 ≤ l ≤ n − 1

3. Orbital energy shift, -l ≤ ml ≤ l

4. Spin, either -1/2 or +1/2

So,

1. 2p sublevels,

n = 2, orbital p, so l = 1, ml = 0, ±1

2. 5f sublevels

n = 5, orbital f, so l = 3, ml = 0, ±1, ±2, ±3

7 0

3 years ago

Why don’t all of the particles in an atom contribute to the mass?

kotegsom [21]

Answer:

Explanation:

The mass of an atom is dependent on its number of protons and neutrons. Electrons have mass, but are too light in comparison to protons and neutrons to contribute towards the overall mass. Their relative mass is about 1/1840 compared to 1 for protons and neutrons, and therefore are not counted in the mass.

Hope this helped!

4 0

3 years ago

How many moles of gold are there in 3.73 x 10^24 atoms of gold?

BARSIC [14]

Answer:

6.2moles of Gold

Explanation:

To solve this problem, we are going to use the mole concept approach.

Given that;

Number of atoms of gold is 3.73 x 10²⁴ atoms

Now;

In 1 mole of any substance, we have 6.02 x 10²³ atoms;

So;

If there 6.02 x 10²³ atoms in 1 mole of any substance;

3.73 x 10²⁴ atoms will contain $\frac{3.73 x 10^{24} }{6.02 x 10^{23} }$ = 6.2moles of Gold

4 0

2 years ago