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kipiarov [429]
3 years ago
11

How many moles of

Chemistry
1 answer:
baherus [9]3 years ago
4 0

Answer: There are 0.0556 moles present in 44.1 mL of a 1.26 M HCl solution.

Explanation:

Given: Volume = 44.1 mL (1 mL = 0.001 L) = 0.0441 L

Molarity = 1.26 M

Molarity is the number of moles of a substance present in liter of a solution.

Therefore, moles of HCl are calculated as follows.

Moles = \frac{moles}{Volume (in L)}\\1.26 M = \frac{moles}{0.0441 L}\\moles = 0.0556 mol

Thus, we can conclude that there are 0.0556 moles present in 44.1 mL of a 1.26 M HCl solution.

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The answer is speed of light. All kinds of light waves travel at 3.00 m/s.

8 0
2 years ago
What do non-metals do if they need 8 valence electrons and can't find a metal?​
kati45 [8]

Answer:

sharing of electron

Explanation:

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3 0
3 years ago
Use your experimentally determined value of ksp and show,by calculations, that ag2cro4 should precipitate when 5ml of 0.004m agn
Doss [256]
When the value of Ksp = 3.83 x 10^-11 (should be given - missing in your Q)

So, according to the balanced equation of the reaction:

and by using ICE table:

              Ag2CrO4(s)  → 2Ag+ (Aq) + CrO4^2-(aq)

initial                                     0                   0

change                              +2X                 +X

Equ                                       2X                   X

∴ Ksp = [Ag+]^2[CrO42-]

so by substitution:

∴ 3.83 x 10^-11 = (2X)^2* X

3.83 x 10^-11 = 4 X^3

∴X = 2.1 x 10^-4 

∴[CrO42-] = X = 2.1 x 10^-4 M

[Ag+] = 2X = 2 * (2.1 x 10^-4) 

                  = 4.2 x 10^-4 M

when we comparing with the actual concentration of [Ag+] and [CrO42-]

when moles Ag+ = molarity * volume

                               = 0.004 m * 0.005L

                               = 2 x 10^-5 moles
[Ag+] = moles / total volume
     
          = 2 x 10^-5 / 0.01L

          = 0.002 M

moles CrO42- = molarity * volume

                         = 0.0024 m * 0.005 L

                         = 1.2 x 10^-5 mol

∴[CrO42-] = moles / total volume

                 = (1.2 x 10^-5)mol / 0.01 L 

                 = 0.0012 M

by comparing this values with the max concentration that is saturation in the solution 

and when the 2 values of ions concentration are >>> than the max values o the concentrations that are will be saturated.

∴ the excess will precipitate out       
8 0
3 years ago
What is the volume in a 2. 00M solution containing 8.00 moles of solute?
MrMuchimi

Answer:

4000cm³

Explanation:

2.0moles-1000cm³

8.0moles-?

(8.0×1000)÷2

=4000cm³

5 0
3 years ago
A compound that allows for communication between one cell and the next is called _________
-Dominant- [34]
<h2>Answer:</h2>

The compound is known as the neurotransmitter or messenger chemicals.

<h3>Explanation:</h3>
  • Neurotransmitters are the chemicals a type of messenger which is used to transmit information from one cell to the next cell.
  • Some hormones are also known as messenger chemicals.
  • The nerve cells are not linked to each other while they are separated from each other by a space known as synapses.
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  • These neurotransmitter signal next cell to produce equal amount of electric signal in nerve cell.

7 0
3 years ago
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