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strojnjashka [21]
3 years ago
9

Why is hydrogen (H) placed with the elements in Group 1A?

Chemistry
2 answers:
Alex787 [66]3 years ago
6 0
It has ns1 electron configuration like the alkali metals. 
NISA [10]3 years ago
6 0

The answer is -


It has the same number of valence electrons


If this helped please rate :)

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Glass breaking. Is it a chemical or physical change?
GaryK [48]
I would say that it is physical because there are no chemicals when the glass is breaking.
<em>HOPE I HELPED!!!</em>
7 0
3 years ago
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When the process of condensation occurs, the kinetic energy of particles.
amm1812

Answer:

Is insufficient to overcome intermolecular forces.

Explanation:

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2 years ago
Question is in the picture
wariber [46]

Answer:

repelled

Explanation:

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8 0
4 years ago
will give brainliest!! please help ! .. Calculate the total pressure of the mixture in atmospheres ( atm ).
nordsb [41]

Answer:

13.94 atm

Explanation:

From the question given above, the following data were obtained:

Pressure of H₂ = 2 atm

Pressure of NH₃ = 303 KPa

Pressure of CO₂ = 3000 mmHg

Pressure of N₂ = 3800 torr

Total pressure (Pₜ) in atm =?

Next, we shall convert 303 KPa, 3000 mmHg and 3800 torr to atm.

This can be obtained as follow:

Converting 303 KPa to atm

101.325 KPa = 1 atm

Therefore,

303 KPa = 303 KPa × 1 atm / 101.325 KPa

303 KPa = 2.99 atm

Thus, 303 KPa is equivalent to 2.99 atm.

Converting 3000 mmHg to atm

760 mmHg = 1 atm

Therefore,

3000 mmHg = 3000 mmHg × 1 atm / 760 mmHg

3000 mmHg = 3.95 atm

Thus, 3000 mmHg is equivalent to 3.95 atm

Converting 3800 torr to atm

760 torr = 1 atm

Therefore,

3800 torr = 3800 torr × 1 atm / 760 torr

3800 torr = 5 atm

Thus, 3800 torr is equivalent to 5 atm.

Finally, we shall determine the total pressure of the mixture as follow:

Pressure of H₂ (P₁) = 2 atm

Pressure of NH₃ (P₂) = 2.99 atm

Pressure of CO₂ (P₃) = 3.95 atm

Pressure of N₂ (P₄) = 5 atm

Total pressure (Pₜ) in atm =?

Pₜ = P₁ + P₂ + P₃ + P₄

Pₜ = 2 + 2.99 + 3.95 + 5

Pₜ = 13.94 atm

Therefore, the total pressure of the mixture is 13.94 atm

4 0
3 years ago
What is the volume of 43.7 g of helium at stp?
tankabanditka [31]
Answer is: volume of helium is 244.72 liters.
m(He) = 43.7 g.
n(He) = m(He) ÷ M(He).
n(He) = 43.7 g ÷ 4 g/mol.
n(He) = 10.925 mol.
V(He) = n(He) · n(He).
V(He) = 10.925 mol · 22.4 L/mol.
V(He) = 244.72 L.
Vm - molar volume at STP.
n - amount of substance.
0 0
3 years ago
Read 2 more answers
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