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tekilochka [14]
3 years ago
9

Give three examples (each) of physical and chemical change and explain why it is classified as physical/chemical change. Someone

help pls :<
Chemistry
1 answer:
Advocard [28]3 years ago
8 0

Answer:

The 3 example of physical change are melting an ice cube, breaking a bottle, and boiling water. The 3 example of chemical change are cooking an egg, baking a cake, rusting a iron.

Explanation:

It is classified as physical /chemical change because chemical change can produce new substances, but a physical change does not.

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Two waves travel through each other, and a crest forms with an amplitude smaller that either original waves. What has happened?
KonstantinChe [14]

Answer:

This is what I think it is, correct me if I'm wrong. Answer is stated below:

Explanation:

Destructive Interference

Two waves combine to form a wave with a smaller amplitude than either the original wave. Destructive interference can occur when the crest of one wave overlaps the trough of another wave. If the crest has a larger amplitude than the trough of the other wave, a part of it remains.

8 0
3 years ago
What is the electronic configuration of the atom x​
Fofino [41]

Answer: K L M. 2 8 6.

Explanation:

6 0
3 years ago
Determine the concentration of a solution of sodium hydroxide (NaOH) using a 0.500M Potassium Hydrogen Phthalate (KHP) standard
Svetradugi [14.3K]

Answer:

0.425M NaOH assuming the volume of KHP was 25.50mL and the volume of the NaOH solution was 30.0mL

Explanation:

The KHP reacts with NaOH as follows:

KHP + NaOH → KNaP + H₂O

<em>Where 1 mole of KHP reacts per mole of KNaP</em>

<em />

That means, the moles of KHP added to the NaOH solution = Moles NaOH at equivalence point. With the moles of NaOH and the volume in liters we can find the molar concentration of NaOH.

<em>Assuming the volume added of KHP was 25.50mL and the solution of NaOH contains 30.0mL (0.0300L), the concentration of the NaOH is:</em>

<em />

<em>Moles KHP = Moles NaOH:</em>

25.50mL = 0.02550L * (0.500mol / L) = 0.01275 moles KHP = Moles NaOH

<em>Molarity NaOH:</em>

0.01275 moles NaOH / 0.0300L =

<h3>0.425M NaOH assuming the volume of KHP was 25.50mL and the volume of the NaOH solution was 30.0mL</h3>
7 0
3 years ago
Q.1 What is one joule work ? ​
Irina-Kira [14]

Answer:

See below.

Explanation:

It is equal to the energy transferred to (or work done on) an object when a force of one newton acts on that object in the direction of the force's.

Best Regards!

8 0
3 years ago
Read 2 more answers
In order to answer this question, you need to look around your immediate surroundings to find examples of rusting of iron or any
wariber [46]

Answer:

(i) rusting is caused by the reaction of oxygen and water on the surface of metals(iron).

(ii) rusting of iron makes it weak and dangerous for buildings since their foundation is made of iron, rusting renders cars useless, rusting can cause accidents.

(iii) by galvanizing iron

and by coating it.

Explanation:

hope it helps .

7 0
4 years ago
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