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Fynjy0 [20]
4 years ago
8

How are physical and chemical changes different

Chemistry
2 answers:
Wittaler [7]4 years ago
3 0

Answer:

physic

Explanation:

physical chnages are chnages to the appearance

chemical chnages are chnages like

color temperature chnaging fromna gas to a liquid etc

mariarad [96]4 years ago
3 0

Answer:

Explanation:

Physical changes do not change the properties of the initial substance. Physical changes are temporary. For eg if you boil water, it turns into vapor. It's chemical composition is still H2O but now its just in gas form instead of liquid but overtime that gas will condensate into water. SO physical changes are reversible most of the times.

Chemical changes change the properties of initial substance. Like burning wood, you can't really reverse this reaction because you can't go from coal to wood, its permanent change. So chemical changes are permanent changes. Like souring milk, acid-base reactions, rotting banana etc.

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The bigger the magnitude , the bigger the Earthquake
aleksley [76]

Answer:

True, in as far as greater magnitude = greater power.

7 0
3 years ago
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Tear off a small, flat sheet of waxed paper. Use the pipette to dispense a drop of water on the waxed paper. Now, dry the pipett
Vilka [71]

Answer:

Explanation:

When comparing the drops of oil and water, one thing I noticed was the shape. The water drop was more defined, whereas the drop of oil began to spread and was much flatter. This may be due to the waxy material, and how both oil and water react to the wax.

7 0
2 years ago
Which of the following objects would take you the greatest amount of force to accelerate?
horsena [70]

Complete question is;

Which of the following object would take you the greatest amount of force to accelerate.

A) a soccer ball with a mass of 0.5 kg

B) a refrigerator with a mass of 200 kg, C) a bike with a mass of 25 kg

D) a car with a mass of 5,000 kg,

Answer:

D) a car with a mass of 5,000 kg

Explanation:

Formula for force is;

F = ma

Where;

F is force

m is mass

a is acceleration

Now, Force is directly proportional to the acceleration and mass.

Thus, the higher the mass, the greater the force.

Thus, the object that will require the most force is the one that has the highest mass.

Looking at the options, the one with the highest mass is option D.

3 0
3 years ago
What mass of Cu(s) is electroplated by running 24.5A of current through a Cu2+(aq)solution for 4.00 h?Express your answer to thr
Masja [62]

Answer: 116 g of copper

Explanation:

Q=I\times t

where Q= quantity of electricity in coloumbs

I = current in amperes = 24.5A

t= time in seconds =  4.00 hr = 4.00\times 3600s=14400s  (1hr=3600s)

Q=24.5A\times 14400s=352800C

Cu^{2+}+2e^-\rightarrow Cu

2\times 96500C=193000C  of electricity deposits 63.5 g of copper.

352800 C of electricity deposits = \frac{63.5}{193000}\times 352800=116g of copper.

Thus 116 g of Cu(s) is electroplated by running 24.5A of current

Thus  remaining in solution = (0.1-0.003)=0.097moles

8 0
3 years ago
Which organelle in the table is correctly matched with its function?<br> which one is it??
Papessa [141]

Answer:

\huge\boxed{\sf Ribosomes}

Explanation:

<h3>Organelles and their function:</h3><h3><u>Lysosomes:</u></h3>
  • Lysosomes functions in the digestion of food of the cell.
  • It contains hydrolytic enzymes.
<h3><u>Vacuole:</u></h3>
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<h3><u>Mitochondrion:</u></h3>
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<h3><u>Ribosome:</u></h3>
  • Ribosome functions in protein synthesis.

\rule[225]{225}{2}

4 0
2 years ago
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