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Orlov [11]
4 years ago
10

Is " Energy created " an Endothermic reaction or an Exothermic reaction?

Chemistry
1 answer:
podryga [215]4 years ago
6 0
A endothermic reaction
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A helium-filled weather balloon has a volume of 512 L at 18.9°C and 756 mmHg. It is released and rises to an altitude of 2.14 km
vazorg [7]

633.97 L

Explanation:

Well use the combined gas law;

P₁V₁T₁ = P₂V₂T₂

We need to change the temperatures into Kelvin;

18.9°C= 292.05 K

5.9°C = 279.05 K

756 * 512 * 292.05 = 639 * V₂ * 279.05

113,044,377.6 = 178,312.95 V₂

V₂ = 113,044,377.6 / 178,312.95

V₂ = 633.97 L

3 0
3 years ago
Read 2 more answers
Does sodium have a positive or negative charge after ionization?
melomori [17]
After ionization, sodium gains a net positive charge cuz sodium loses its 1 valence electron to gain the nearest stable octet which is neon{Ne}. Hope it helps
3 0
3 years ago
What trend is seen in atom size, going down the periodic table?
m_a_m_a [10]
Answer:
It is called Ionization Energy.
7 0
3 years ago
What is the pOH of a solution with [OH'] = 9,0 x 10-7?
bearhunter [10]

Answer: D (6.04) is the best answer

Explanation:

pOH = - log [OH⁻]

pOH = - log (9.0 x 10⁻⁷)

pOH = 6.0457

6 0
3 years ago
I need the answer for number 3 please I need to check if I’m correct?
balandron [24]
Yes you are correct hope you do well
5 0
3 years ago
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