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PIT_PIT [208]
2 years ago
10

What is the mass of 21.7 moles of Al(NO3)3?

Chemistry
1 answer:
Elza [17]2 years ago
5 0

Answer:I would say 21grams but i am not sure

Explanation:

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It could be used as a buffer, since it is not a conductor.  Hope this helps!!!
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Considering that silicon is a metalloid, which of the following statements is true? A. Silicon's ability to conduct electric cur
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The answer is D. Hope it helps! :) 
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3 years ago
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Many carboxylic acids are much better known by their common names than by their systematic names. 2-Hydroxypropanoic acid (bette
sdas [7]

Answer:

  • CH₃ - CH - COOH

                  |

                  OH

  • The developed structural formula is also attached.

Explanation:

The IUPAC name, <em>2-hydroxypropanoic acid</em>, lets you predict the structural formula for <em>lactic acid</em>.

  • <em>2-hydroxy</em> means that there is a OH functional group attached to the second carbon atom of the chain.

  • <em>Propan</em> prefix means that the molecule has 3 carbon atoms.

  • <em>oic</em> suffix means that it is a carboxylic acid, this is it contains the COOH functional group.

Hence, in conclusion the structural form of lactic acid is:

  • C³H₃ - C²H - C¹OOH

                   |

                   OH

I used the superscripts just to show the number of the carbon atom in the chain.

The formal structural formula does not contain such superscripts it is just:

  • CH₃ - CH - COOH

                  |

                  OH

A more developed structural formula will show the distribution of the atoms in the space. I have also attached a picture with the developes structural formula.

3 0
3 years ago
An ion has a charge of -1 and 10 electrons. How many protons does it have?
ivanzaharov [21]
If the ion has a charger of -1 and 10 electrons then it has 9 protons
3 0
3 years ago
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What is the osmotic pressure of a solution made from 12.5 g of CaCl2 in enough water to make 500 mL, if CaCl2 is 78.5% dissociat
murzikaleks [220]

The osmotic pressure of a solution made from 12.5 g of CaCl2 in enough water to make 500 mL, if CaCl2 is 78.5% dissociated at 30oC is 167.087 atm

<h3>Define osmotic pressure:-</h3>

Osmotic pressure and osmosis are connected. Osmosis is the passage of a solvent through a semipermeable membrane into a solution. The pressure that halts the osmosis process is known as osmotic pressure. Osmotic pressure is a collective attribute of material because its value is determined by the solute's concentration rather than its chemical composition.

The formula used to calculate Osmotic Pressure is:-

π = M x R x T x i

Where;

π =osmotic pressure (in atm)

M=molar concentration (in mol/L)

  =(given mass/molar mass)/volume=(12.5g /111.0)/(500/1000)

  =0.224 mol/L

R=Universal gas constant (0.08206 L.atm/mol.K)

T=absolute temperature (in K) = 30.C + 273 = 303 K

i= van't Hoff factor of solute =3

using the formula and  substituting values;

π=0.224 x 0.08206 x 303 x 3

   = 167.087 atm

The osmotic pressure is 167.087 atm

Learn more about osmotic pressure here:-

brainly.com/question/14756474

#SPJ4

7 0
2 years ago
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