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enot [183]
3 years ago
8

Explain why it is important to eat the wet sand before heating the iron wool​

Chemistry
2 answers:
MaRussiya [10]3 years ago
5 0

Answer:

huh,eat wet sand b4heating iron wool??

masya89 [10]3 years ago
3 0

Answer:

Iron is a metal.

Iron wool is made up of thin strands of

iron loosely bundled together.

Your teacher has attached a piece of

iron wool to a see-saw balance. At the

other end of the see-saw is a piece of

Plasticine.

Iron wool can combust. Your teacher is

going to make the iron wool combust by

heating it.

If there is a change in mass, the see-saw

will either tip to the left or to the right.

Explanation:

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5 0
3 years ago
Question 2 (2 points)
poizon [28]

Answer:

m_w=439.2g

Explanation:

Hello!

In this case, since the by-mass percent of a solution is a measure of the mass of the solute over the mass of the solution:

\%m/m=\frac{m_{solute}}{m_{solution}} *100\%

As we know the mass of the solution and the by-mass percent, we can compute the mass of glucose in the 480 g of solution:

m_{solute}=\frac{\%m/m*m_{solution}}{100\%}

Thus, by plugging in the data, we obtain:

m_{solute}=\frac{8.5\%*480g}{100\%}=40.8g

Finally, since the solution is made up of glucose and water, we compute the mass of water as follows:

m_w=m_{sol}-m_{solute}=480g-40.8g\\\\m_w=439.2g

Best regards!

7 0
3 years ago
7. Which is an example of a good insulator? <br>iron<br>copper <br>silver <br>rubber​
Dmitrij [34]

Answer:

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Remaining three are metals and hence conductors.

4 0
3 years ago
A type of force where objects touch each other ​
leonid [27]

Answer:

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3 0
3 years ago
If Mary likes Johnny, but Johnny likes Katie, and Katie likes Mary. What do they do?
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Answer:

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