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lora16 [44]
3 years ago
14

Al2O3; The ___ show the ___ of each atom in the ___

Chemistry
1 answer:
sasho [114]3 years ago
4 0

atoms definitions and I hope this helps

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What mass of al is required to completely react with 25.0 grams of mno2?
horsena [70]
Mass of MnO2 = 25 g 
The reaction would be 3MnO2 + 4Al --> 3Mn(s) + 2Al2O3
 Molar mass of Al = 26.982 g/mol
 Molar mass of MnO2 = 54.938 + 2(15.999) = 86.936 g/mol
 Calculating the moles = 25 / 86.936 = 0.2876 mol.
 Mole ratio MnO2 and Al considering the equation = 3 mol of MnO : 4 mol of Al
 Calculating the moles of Al = 0.2876 mol MnO2 x (4 mol of Al / 3 mol of MnO)
 Number of moles of Al = 0.3834
 Getting the mass in grams as asked = 0.3834 mol x 26.982 g/mol = 10.34 grams.
6 0
3 years ago
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Answer:

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2 years ago
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Argon-40 undergoes positron emission as shown:
Rudik [331]

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\frac{40}{18}Ar => \frac{40}{17}Cl + \frac{0}{1}e\\

Explanation:

3 0
3 years ago
Molecule A is a __________. Bonding of fatty acids and polar phosphate groups to glycerol. Molecule A is a __________. Bonding o
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The correct option is: c. phospholipid      

Explanation:

Phospholipids, also known as glycerophospholipids, are the derivatives of fatty acids which is a major structural component of the cell membranes.

Phospholipid is the class of lipids that is composed of a <u>glycerol molecule that forms ester bonds with the two long-chain fatty acids and one phosphate group.</u>

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Answer:

A

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