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Leokris [45]
4 years ago
8

PLEASE ANSWER

Chemistry
1 answer:
juin [17]4 years ago
8 0

F.Wave C has a higher frequency than wave D

D. Wave B would sound quieter than wave C

B. Wave D has a higher amplitude than wave A

Explanation:

  • A high amplitude wave is a high-energy wave, and a low-amplitude wave is a low-energy wave.
  • In sound waves, a high amplitude sound will be loud, and a low amplitude sound will be quiet.
  • Frequency is the number of ways that pass by each second, measured in hertz.
  • The amplitude and frequency are the two factors that affect the energy which is transferred by a wave.
  • The height of the wave, and the number of waves passed by each second in case of amplitude and frequency.
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Mrrafil [7]
Hi there! I was looking at this a few days ago for school and found this 

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4 years ago
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H2CO3(aq) + H200 H30 (aq) + HCO3 (aq).
timofeeve [1]

Answer:

K_a=\frac{[H_3O^+][HCO_3^-]}{[H_2CO_3]}

Explanation:

Several rules should be followed to write any equilibrium expression properly. In the context of this problem, we're dealing with an aqueous equilibrium:

  • an equilibrium constant is, first of all, a fraction;
  • in the numerator of the fraction, we have a product of the concentrations of our products (right-hand side of the equation);
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  • each concentration should be raised to the power of the coefficient in the balanced chemical equation;
  • only aqueous species and gases are included in the equilibrium constant, solids and liquids are omitted.

Following the guidelines, we will omit liquid water and we will include all the other species in the constant. Each coefficient in the balanced equation is '1', so no powers required. Multiply the concentrations of the two products and divide by the concentration of carbonic acid:

K_a=\frac{[H_3O^+][HCO_3^-]}{[H_2CO_3]}

4 0
4 years ago
The molecular mass of CO2 is 44.01 u. What is the mass of 2.0 mol of CO2?
Vesnalui [34]

Answer:

The mass of 2.0 mol of C02 is 44 grams

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6 0
3 years ago
How many molecules are in 25g of Na2SO4?
bearhunter [10]
Hey there!

Molar mass Na2SO4 = 142.04 g/mol

Number of moles:

n = m / mm

n = 25 / 142.04

n = 0.176 moles of Na2SO4

Therefore, use the Avogadro constant

1 mole Na2SO4 ------------------- 6.02x10²³ molecules
0.176 moles Na2SO4 ------------   molecules ??


0.176  x  ( 6.02x10²³ ) / 1 

=> 1.059x10²³ molecules of Na2SO4

hope this helps!


3 0
3 years ago
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AURORKA [14]

The answer is D.

The air inside the bubbles is gas and the solid forms the bubble.

6 0
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