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uranmaximum [27]
3 years ago
14

What is the electron configuration for an electrically neutral atom of beryllium (Be)?

Chemistry
1 answer:
irakobra [83]3 years ago
8 0

Answer:

1s²2s2

Explanation:

that's the correct brainliest answer and D

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Suggest 2 reasons why the noble gases become less ideal in their behaviour down the group from helium to xenon.
Elenna [48]
Reason1: electrons on farther layers become free easyer
2nd reason: volume of atoms grows (from Helium to Xeon) so instead  of boyle-mariot law equation (PV=vRT) is  more accurate to use van der walls equations that adds to the boyle-mariot equation the volume occupied by the atoms of the gas to the volume of the space between the atoms P(Vm-b)=vRT
4 0
3 years ago
How many moles of ethylene (C2H4) can react with 12.9 liters of oxygen gas at 1.2 atmospheres and 297 Kelvin? C2H4(g) + 3O2(g) y
7nadin3 [17]
1) Convert 12.9 liters of Oxygen to mol at the given conditions:

PV = nRT ⇒ n = PV/RT

n = [1.2atm*12.9 l] / [0.082 atm l /K mol * 297K]

n = 0.636 mol of O2

2) use the stoichiometry derived from the balanced chemical equation

 1mol C2H4 / 3  mol O2 =  x mol C2H4 / 0.636 mol O2

x = 0.636 / 3 mol O2 = 0.212 mol O2.

Answer: 0.212 mol O2
5 0
3 years ago
A plane travels at 600 km/hr. How far will it travel in 3 hrs 15 min ?
ElenaW [278]
Answer:
1950 km in 3 hrs 15 min
step-by-step explanation:
600 • 3.25
1950 km
8 0
3 years ago
2.822 mol of nickel has _________ atoms of nickel.<br><br> (Enter just the number for this one.)
Irina-Kira [14]

Hello!

To find the number of atoms in 2.822 moles of nickel, we need to multiply it by Avogadro's number. Avogadro's number is 6.02 x 10^23 atoms.

2.822 moles x (6.02 x 10^23) ≈ 1.698844 x 10^24

Therefore, there are about 1.70 x 10^24 atoms (according to the number of significant figures) in 2.822 moles of nickel.

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Indigestion can be cured by antacid
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Answer: ummmm

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3 0
3 years ago
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