All categories

4 years ago

Picking up a paper clip with a magnet. Physical change, Chemical change, or neither

1 answer:

4 0

Hello there! :D

A physical change is a change in which something is changed in appearance. For example, if I cut a piece of paper in half.

A chemical change is when the composition (or the makeup) of something is changed. For example, baking soda and vinegar. They react to form a whole different thing.

Picking up a paper clip with a magnet doesn't change its appearance. It doesn't change its composition. The magnet only picks up the paper clip because it attracts magnetic objects, if you were to take it off of the paper clip it would still be the same paper clip, and most likely look the same.

I hope this helps!
~kaikers

You might be interested in

A student prepares a solution by combining 100 mL of 0.30 M HNO2(aq) and 100 mL of 0.30 M KNO2(a). Which of the following equati

katrin2010 [14]

Answer:

Explanation:

This creates a buffer solution meaning it will just neutralize out and does not change the PH massively.

7 0

3 years ago

Pls help tysm <3 :D:D

Marianna [84]

Not sure about 2 or 3 but I believe that for number 1 is B or claim 2!!

5 0

3 years ago

At 298 K, Kc = 1.45 for the following reaction 2 BrCl (g) Br2(g) + Cl2(g) A reaction mixture was prepared with the following ini

tester [92]

Answer:

[BrCl]=0.02934M

[Br2]=[Cl2]=0.03533M

Explanation:

First, consider the Kc definition:

$1.5=K_{c}=\frac{[Br_{2}][Cl_{2}]}{[BrCl]^{2}}$

It is necessary to define a new variable, 'x', as the amount of moles of Br2 that are produced. If 'x' moles of Br2 are produced, the moles of the compounds will be calculated as;

$n_{Br_{2}}=n_{{Br_{2}}^{0}} +x\\n_{Cl_{2}}=n_{{Cl_{2}}^{0}} +x\\n_{BrCl}=n_{{BrCl}}^{0}} -2x\\$

Where the zero superscript means the initial moles.

Dividing the last equations by the volume, which is constant because the reaction does not change the total moles number (2 moles of BrCl produce 2 moles, one of Cl2 and another of Br2), we have the molarity equations for all species:

$M_{Br_{2}}=M_{{Br_{2}}^{0}} +x\\M_{Cl_{2}}=\\M_{BrCl}=M_{{BrCl}}^{0}} -2x\\$

And now 'x' is a change in molarity.

Replacing these in the Kc equation we have:

$1.45=\frac{({M_{{Br_{2}}}^{0}}+x)({M_{{Cl_{2}}}^{0}}+x)}{({M_{{BrCl}}^{0}}-2x)^{2}}$

Where the only unknown is 'x'. So, let's solve the equation:

$1.45=\frac{(0.03+x)(0.03+x)}{(0.04-2x)^{2} } \\1.45(0.04-2x)^2=(0.03+x)^2\\1.45(0.0016-0.16x+4x^2)=0.0009+0.06x+x^2\\4.8x^2-0.292x+0.00142=0\\x_{1}=0.0555\\x_{2}=0.00533$

The result $x_{1}=0.0555$ lacks of sense because it will give a negative concentration for BrCl, so the result is $x_{2}=0.00533$ <u>.</u>

Applying the result, the concentrations at equilibrium are:

$M_{Br_{2}}=M_{Cl_{2}}=0.03+0.00533=0.03533M\\M_{BrCl}=0.04-2*0.00533=0.02934M$

If you calculate Kc with this concentrations it will give 1.45 as a result.

Greets, I will be happy to solve any doubt you have.

8 0

4 years ago

Which type of isomers are o-xylene, m-xylene, and p-

mojhsa [17]

The o-xylene, m-xylene, and p-Xylene are constitutional isomers. The correct option is D.

<h3>What are isomers?</h3>

Isomers are the elements or polyatomic elements that have similar molecular formula.

All options are attached here:

A.optical isomers

B.structural isomers

C.geometric isomers

D.constitutional isomers

Thus, the correct option is D.constitutional isomers.

Learn more about isomers

brainly.com/question/13422357

#SPJ1

4 0

2 years ago

HELP ASAP!

maxonik [38]

Answer:

Electromagnetic Radiation

Activity: TV or Radio

Type: Infrared Waves

Description of use:A television (also known as a TV) is a machine with a screen. Televisions receive broadcasting signals and turn them into pictures and sound. The word "television" comes from the words tele (Greek for far away) and vision (sight). ... Computers and mobile devices also can be used for watching television programs.

7 0

3 years ago