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Nataliya [291]
2 years ago
9

Please check my answer! Due in a few minutes!

Chemistry
2 answers:
rewona [7]2 years ago
8 0

Answer:

Explanation:

It is A. that is the only one that really makes any sense to me.

I do hope I helped you! :)

Gwar [14]2 years ago
6 0

Answer:

write a hypothesis

Explanation:

in a lb procedure a hypothesis is most likely useful whaen doing science

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P is the pressure in atmospheres (atm), V is the volume in liters (L), n is the number of moles, R is the gas constant (0.0821 L
yKpoI14uk [10]

Answer:

The mass of the neon gas  m = 1.214 kg

Explanation:

Pressure = 3 atm = 304 k pa

Volume = 0.57 L = 0.00057 m^{3}

Temperature = 75 °c = 348 K

Universal gas constant = 0.0821 \frac{L . atm}{mol K}

We have to change the unit of this constant. it may be written as

Universal gas constant = 8.314 \frac{KJ}{mol K}

Gas constant for neon = \frac{8.314}{20} = 0.41 \frac{KJ}{kg K}

From ideal gas equation,

P V = m R T ------- (1)

We have all the variables except m. so we have to solve this equation for mass (m).

⇒ 304 × 10^{3} × 0.00057 = m × 0.41 × 348

⇒ 173.28 = 142.68 × m

⇒ m = 1.214 kg

This is the mass of the neon gas.

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3 years ago
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Answer:

My school  has no stationary and my teacher has no stationary

Explanation:

cuz i am smart duh

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2 years ago
What observation would you look for to tell if a reaction was endothermic?
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Exothermic reactions release heat into their surroundings and endothermic reactions absorb heat and are cool. I believe the correct answer is D.

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1 is evaporate and 2 is precipitate
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