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KIM [24]
3 years ago
11

#15 need help don’t understand

Chemistry
1 answer:
andreev551 [17]3 years ago
7 0
I got B. Lmk if u need explanation
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When a musician blows into a trumpet, a sound wave is formed that moves in the same direction as the musician's breath. This is
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Answer:

Longitudinal wave

Explanation:

This is a longitudinal wave. Air is known to travel through a longitudinal wave. A wave is a disturbance that goes through a medium. As this musician blows into his trumpet, a vibration is formed, which moves in the direction as where the wave is coming from. Air moves in parallel direction as the wave

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3 years ago
DETERMINE THE MOL OF WATER NEEDED TO REACT WITH1.5 MOL OF NITROGEN DIOXIDE. 3NO2+ H20→ 2HNO3 + NO
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Answer: 0.5 mol h2o

Explanation: Hope this help :D

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3 years ago
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victus00 [196]

Answer:

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Explanation:

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3 years ago
What is the molality of the resulting solution when 15.0 g of Licl is combined with 105 g of water? 0/1 point 0 1.42 m 2.95 m 3.
xenn [34]

Answer:

3.37 m

Explanation:

<u>Number of moles of solute present in 1 kg of solvent is termed as molality</u>

It is represented by 'm'.

Thus,

Molality\ (m)=\frac {Moles\ of\ the\ solute}{Mass\ of\ the\ solvent\ (kg)}

Given that:

The mass of LiCl = 15.0 g

Molar mass of LiCl = 42.394 g/mol

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

Thus,

Moles= \frac{15.0\ g}{42.394\ g/mol}

Moles= 0.3538\ mol

Mass of the solvent = 105 g

Also, 1 g = 0.001 g

So,

Mass of water (solvent) = 0.105 kg

Molality is:

Molality\ (m)=\frac {0.3538}{0.105}\ m

<u>Molality = 3.37 m</u>

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3 years ago
The two beakers contain water.
lord [1]

Answer:

STUDY!

Explanation:

8 0
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