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Mkey [24]
3 years ago
13

Kim is doing an experiment with sound waves. She tested to see how quickly a sound wave could travel through three different mat

erials: a metal pole, a helium balloon and a glass of water. She recorded her results. Which of the following is most likely true? Group of answer choices The sound wave traveled more quickly through the water than the balloon. The sound wave traveled the slowest through the metal pole. The sound wave traveled the fastest through the helium. The sound wave traveled more quickly through the glass of water than the metal pole.
Chemistry
1 answer:
Semenov [28]3 years ago
7 0

Answer:

<h2>"The sound wave traveled more quickly through the water than the balloon."</h2>

Explanation:

A sound is produced by <em>vibration. </em>These vibrations are called<u><em> "sound waves."</em></u> In order for sound waves to travel, it needs a particular medium. This medium can either be <em>solid, liquid or gas.</em>

Remember that sound waves travel faster in a <u>"solid medium,"</u> because this matter is denser than the other two. Sound waves travel faster in liquid than in gas, because water is densely packed with particles than gas (such as air).

In the situation above, the answer is "The sound wave traveled more quickly through the water than the balloon." As I've mentioned earlier, sound waves travel faster in liquid than in gas. Thus, the sound waves traveled faster through the glass of water (liquid) than the helium (gas) balloon.

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We need to measure 20.0 grams of CaCl₂ to prepare 500 mL of 0.360 M solution.

First, we need to determine the required moles of CaCl₂. We have 500 mL (0.500 L) of a 0.360 M solution (0.360 moles of CaCl₂ per liter of solution).

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Then, we will convert 0.180 moles to grams using the molar mass of CaCl₂ (110.98 g/mol).

0.180 mol \times \frac{110.98g}{mol} = 20.0 g

To prepare the solution, we weigh 20.0 g of CaCl₂ and add it to a beaker with enough distilled water to dissolve it. We stir it, heat it if necessary, and when we have a solution, we transfer it to a 500 mL flask and complete it to the mark with distilled water.

We need to measure 20.0 grams of CaCl₂ to prepare 500 mL of 0.360 M solution.

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