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3 years ago

Claim: Sound is not matter. Which piece of evidence supports this claim?

Chemistry

1 answer:

Zarrin [17]3 years ago

7 0

Answer:

Sound Energy is a form of Mechanical Energy

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Calculate the approximate amount os sodium hydroxide needed to make 500ml if a. 3 naoh solution.

Rainbow [258]

6 gram of sodium hydroxide (NaOH) needed to make 500ml if 0.3 NaOH solution.

<h3>What is molarity? </h3>

Molarity (M) is the amount of a substance in a certain volume of solution.

Molarity is defined as the moles of a solute per liters of a solution.

The unit of molarity is mol/L.

Volume of NaOH = 500 mL

Molarity of the aqueous solution = 0.3 M

Molar mass of NaOH= (23+16+1) g = 40g

Let the mass of NaOH be X.

Now , according to formula number of moles of a given substance = given mass / molar mass

Therefore, no. of moles of NaOH = X/40

Since, molarity = number of moles of solute/ volume of solution in liter.

Hence, 0.3 = ( X /40) / (500 / 1000)

Solving this we get X= 6g

6 gram of sodium hydroxide (NaOH) needed to make 500ml if 0.3 NaOH solution.

Learn more about molarity, Here:

brainly.com/question/12127540

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8 0

2 years ago

Which of the following questions is most testable through scientific experimentation?

Dominik [7]

The Question that I believe that is the most testable through scientific experimentation would be the first question.

Which gelatin takes longer to set. Gelatin with fruit or gelatin without fruit.

3 0

3 years ago

Read 2 more answers

The heat gained by the ice melted the ice and raised the temperature of the melted ice from its initial temperature to the final

liberstina [14]

Answer:

True

Explanation:

When ice is heated, the ice gains heat.

This heat gained by the ice is both used to break the intermolecular forces in ice to form water, as well as to raise the temperature of the water to it's final temperature.

4 0

3 years ago

if you are told to get 100 mL of stock solution to use to prepare smaller size sample for an experiment, which piece of glasswar

fgiga [73]

Answer:

A beaker

Step-by-step explanation:

Specifically, I would use a 250 mL graduated beaker.

A beaker is appropriate to measure 100 mL of stock solution, because it's easy to pour into itscwide mouth from a large stock bottle.

You don't need precisely 100 mL solution.

If the beaker is graduated, you can easily measure 100 mL of the stock solution.

Even if it isn't graduated, 100 mL is just under half the volume of the beaker, and that should be good enough for your purposes (you will be using more precise measuring tools during the experiment).