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Andreyy89
3 years ago
15

To double-check a chemical in lab before using it, sniff near the opening of the container, true or false?

Chemistry
1 answer:
Bezzdna [24]3 years ago
5 0
The answers is false because you do not want to inhale unknown chemicals
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Solid a is a very hard electrical insulator in solid as well as in molten state and melts at extremely high temperature. What ty
devlian [24]

This is covalent network type of solid.

For example, silicon dioxide (SiO₂) is covalent network solid with covalent bonding.

Covalent network solid is a chemical compound (or element) in which the atoms are bonded by covalent bonds in a continuous network extending throughout the material.

Silicon(IV) oxide has continuous three-dimensional network of SiO₂ units and diamond has sp3 hybridization.

This solids do not have free electrons so they are good insulators.

They have strong covalent bonds, so they melt at extremely high temperature.

Other examples are quartz, diamond, and silicon carbide.

More about network solid: brainly.com/question/15548648

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5 0
1 year ago
Which of the following is not a correct chemical equation for a double displacement reaction?
Ivahew [28]

i just took the test the answer is B

4 0
2 years ago
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Why is Jon Dalton’s discovery important to science? Help please
Veronika [31]

Answer:

Dalton expressed his assumption in A Modern Model of Chemical Theory that atoms of various elements should be uniformly differentiated, based on their differing atomic weights. In doing so, he became the first scientist to explain atom behavior as regards weight measurement.

Explanation:

8 0
2 years ago
A welding torch produces a flame by burning acetylene fuel in the presence of oxygen. the energy released from the acetylene fue
Sveta_85 [38]

A welding torch produces a flame by burning of acetylene fuel then energy released from the acetylene fuel is then used to melt a metal, so transformation of chemical energy into thermal energy takes place.

<h3>What is transfer of energy?</h3>

Energy neither can be produced nor destroyed but it only transfers from one form to other form.

In the question it is given that, burning of acetylene produces energy and this produced energy is a type of chemical energy and then this is used as a thermal energy for the melting of metal.

So conversion of kinetic energy to potential energy, thermal energy to electromagnetic energy and potential energy to chemical is wrong.

Hence transformation of chemical energy into thermal energy takes place.

To know more about transformation of energy, visit the below link:

brainly.com/question/14754310

4 0
1 year ago
What is the Si ( metric) for distance?<br>A.meters<br>B.inches<br>C.feet<br>D.kilometers
bixtya [17]

A.meter is the is the answer to the problem you and and if you need to know why then type back

7 0
2 years ago
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