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Mrrafil [7]
3 years ago
11

1. The behavior that occurs when a wave bends as it changes media is known as

Chemistry
2 answers:
Elodia [21]3 years ago
8 0

Answer:

b refraction

Explanation:

i saw on nasa's website lol

Pepsi [2]3 years ago
4 0
D because its changing
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If 24.6 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 301 Kelvin and 1.01 atmosph
andreev551 [17]
Answer: 43.3 l


Explanation:

1) Chemical equation:
2 Li(s) + 2 H₂O (l) → 2LiOH(aq) + H₂ (g)

2) Mole ratios:

2 mol Li : 2 mol H₂O : 2 mol LiOH : 1 mol H₂

3) Number of moles of Li that react

n = mass in grams / atomic mass = 24.6g / 6.941 g/mol = 3.54 moles

4) Yield

Proportion:

2 mol Li / 1 mol H₂ = 3.54 mol  Li/ x


⇒ x = 3.54 mol Li × 1 mol H / 2 mol Li = 1.77 mol H₂

4) Ideal gas equation

PV = nRT ⇒ V = nRT / P

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V = 43.3 l ← answer



7 0
3 years ago
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