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RoseWind [281]
4 years ago
13

2 Points Which of the following is an example of a physical change?

Chemistry
1 answer:
marin [14]4 years ago
7 0

Answer:

An example of a physical change is the process of tempering steel to form a knife blade.

Explanation:

A steel blank is repeatedly heated and hammered which changes the hardness of the steel, its flexibility and its ability to maintain a sharp edge.

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Lol nevermind i figured it out
Scorpion4ik [409]
Hehehehe hi,
If someone else answers please please pleaseeeee mark me as brainliest. Thank youuu
6 0
3 years ago
Can someone tell me a summary of volcanoes and plate tectonics? (Please quickly!)
slamgirl [31]
TECTONIC PLATES

a theory explaining the structure of the earth's crust and many associated phenomena as resulting from the interaction of rigid lithospheric plates which move slowly over the underlying mantle.
VALCONES AND TECTONIC

Most volcanoes form at the boundaries of Earth's tectonic plates. These plates are huge slabs of the Earth's crust and upper mantle, which fit together like pieces of a puzzle. These plates are not fixed, but are constantly moving at a very slow rate. They move only a few centimeters per year.
3 0
3 years ago
Read 2 more answers
potassium chlorate (kclo3) decomposes into potassium chloride (kcl) and oxygen gas (o2) how many grams of oxygen can be produced
sergeinik [125]

Answer:

m_{O_2}=354.24gO_2

Explanation:

Hello,

In this case, the undergoing chemical reaction is:

2KClO_3(s)\rightarrow 2KCl(s)+3O_2(g)

In such a way, as 7.38 moles of potassium chloride are decomposed, the resulting grams of oxygen are computed considering a 2 to 3 molar relationship in the chemical reaction:

m_{O_2}=7.38molKClO_3*\frac{3molO_2}{2molKClO_3}*\frac{32gO_2}{1molO_2} \\\\m_{O_2}=354.24gO_2

Best regards.

7 0
4 years ago
Read 2 more answers
Two examples of colloids
erica [24]
{\huge {\mathfrak {\orange {Answer :-}}}}

➡️ Milk

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REGARDS, ARNAB ✌️

THANK YOU
8 0
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