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otez555 [7]
3 years ago
10

What is the material used to make plaster of paris​

Chemistry
2 answers:
Natalija [7]3 years ago
8 0

Gʏᴘsᴜᴍ ɪs ᴛʜᴇ ᴍᴀᴊᴏʀ ᴄᴏᴍᴘᴏɴᴇɴᴛ .

lorasvet [3.4K]3 years ago
4 0

Plaster of Paris is a mixture of powdered calcium sulphate (commonly known as gypsum) and water that hardens quickly. It has been used in a wide variety of decorative applications (e.g. moulds, statuary, casts, etc.) for many centuries.

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Describe how changing the particles changed the atom
Zanzabum
Bonds between atoms break and new ones form and energy is either given out or taken in
5 0
3 years ago
Which has the higher percentage of aluminum, Al2O, or Al(NO3)3
Rzqust [24]

Al₂O  has a higher percentage of aluminium.

Explanation:

To solve this problem, we have to compare the molar mass of the aluminium in each compound to one another as percentage of the whole compound:

Molar mass of Al₂O = 2(27) + 16 = 70g/mol

Molar mass of Al(NO₃)₃ = 27 + 3[14 + 3(16)] = 213g/mol

Percentage by mass of Al in Al₂O = \frac{2x27}{70} x 100 = 77%

Percentage by mass of Al in  Al(NO₃)₃ = \frac{27}{213} x 100 = 12.7%

Al₂O  has a higher percentage of aluminium.

learn more:

Molar mass brainly.com/question/2861244

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8 0
3 years ago
Which is the smallest number?
My name is Ann [436]

Answer:

What I came up with was D equaling out to be 42

Explanation:

Im assuming you just do the math

A. 3.5 x 104 = 364

B. 2.4 x 103 = 247.2

C. 1.4 x 10^2_2 = 280

D. 4.9 x 10-7 = 42

I hope I helped.

5 0
3 years ago
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lesya [120]

AMSWER :

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2 years ago
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3 years ago
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