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Anestetic [448]
4 years ago
11

A neutral atom of beryllium (Be) has an average mass of 9 amu and 4 electrons. How many neutrons does it have?

Chemistry
2 answers:
anygoal [31]4 years ago
8 0

Answer:

I think the answer could be 13 i hope this helps

VladimirAG [237]4 years ago
3 0
I got 13 as well for that problem
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What is a renewable resource on Earth?<br><br> minerals<br> coal<br> wind<br> petroleum
scoundrel [369]

Answer:

Wind

Explanation:

Wind turbines make energy by the movement of the natural force on earth called 'wind' and renewable resources are resources that can be made from natural and environment-safe objects or things (e.g. Water, Geothermal Heat, The Sun, and Wind)

4 0
3 years ago
CS2 (s) + 3 O2 (g) → CO2 (g) + 2 SO2 (g)
Natasha_Volkova [10]

Answer:

2.067 L ≅ 2.07 L.

Explanation:

  • The balanced equation for the mentioned reaction is:

<em>CS₂(g) + 3O₂(g) → CO₂(g) + 2SO₂(g),</em>

It is clear that 1.0 mole of CS₂ react with 3.0 mole of O₂ to produce 1.0 mole of CO₂ and 2.0 moles of SO₂.

  • At STP, 3.6 L of H₂ reacts with (?? L) of oxygen gas:

It is known that at STP: every 1.0 mol of any gas occupies 22.4 L.

<u><em>using cross multiplication:</em></u>

1.0 mol of O₂ represents → 22.4 L.

??? mol of O₂ represents → 3.1 L.

∴ 3.1 L of O₂ represents = (1.0 mol)(3.1 L)/(22.4 L) = 0.1384 mol.

  • To find the no. of moles of SO₂ produced from 3.1 liters (0.1384 mol) of hydrogen:

<u><em>Using cross multiplication:</em></u>

3.0 mol of O₂ produce → 2.0 mol of SO₂, from stichiometry.

0.1384 mol of O₂ produce → ??? mol of SO₂.

∴ The no. of moles of SO₂ = (2.0 mol)(0.1384 mol)/(3.0 mol) = 0.09227 mol.

  • Again, using cross multiplication:

1.0 mol of SO₂ represents → 22.4 L, at STP.

0.09227 mol of SO₂ represents → ??? L.

∴ The no. of liters of SO₂ will be produced = (0.09227 mol)(22.4 L)/(1.0 mol) = 2.067 L ≅ 2.07 L.

8 0
4 years ago
A balloon is filled with 30L of helium gas at 1atm.What is the volume when balloon rises to an attitude where the pressure is on
Harrizon [31]

Answer:

V_2=120L

Explanation:

Hello!

In this case, since Helium is undergoing a volume-pressure change, according the Boyle's law, we infer the following equation is used:

P_1V_1=P_2V_2

Thus, since we are not given the volume at 0.25 atm, we can solve for V2 to do so:

V_2=\frac{P_1V_1}{P_2}

Thus, we plug in to obtain:

V_2=\frac{1atm*30L}{0.25atm}=120L

Best regards!

7 0
3 years ago
PLEASE HELP ASAP!!!<br><br> Name another compound that can be used to treat acidic soil
mamaluj [8]
Another compound that can be used to treat acidic soil is calcium carbonate.<span />
5 0
3 years ago
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Identify the element in Period 3 of the Periodic Table that reacts with oxygen to form an ionic compound represented by the form
Vikki [24]
The metal compound in period 3 is a group 1 metal - Na.

the compound is Na2O, the base annyhdride of NaOH :)
8 0
3 years ago
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