HELP ASAP!!!
What is the molarity of 930 mL of LiCl solution that contains 139.9 g of LiCI?
A. 3.5 mol/L
B. 150 mol/L
C. 3.3 mol/L
D. 3.5 x 10-3 mol/L
Answers
Explanation:
To determine the molarity, we have to find the number of moles in the volume given, and then extrapolate to find the number of moles that would be in 1 L.
Determine the moles in the given volume
moles of LiCl = mass ÷ molar mass
= 139.9 g ÷ 42.39 g/mol
= 3.30 mol
Find the moles in 1 L
Since 930 mL of LiCl = 3.30 mol
then 1000 mL of LiCl = (3.30 mol × 1000 mL/L) ÷ 930 mL
= 3.55 mol/L
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How many liters of ammonia gas can be formed from 24.5 L of hydrogen gas at STP?
Answers
Answer: 16.3 L of ammonia gas can be formed from 24.5 L of hydrogen gas at STP
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
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if the hydrogen ion concentration [H+] in a solution is 1.87 x 10^-11M what is the [OH-]
Answers
By using pH formula, the concentration of hydroxyl ion [OH-] will be 5.3 ×[tex]10^{-4}[/tex] M.
What is pH?
The pH scale is a measurement of hydrogen ion concentration that is used to determine the acidity as well as alkalinity of a solution.
Calculation of [OH-] by using formula of pH.
Given data:
[H+] = 1.87 x [tex]10^{-11} M[/tex]
[OH-] = ?
Calculation of [OH-] is shown below:
It can be calculated by using the formula:
pH = -log [H+]
Put the value of concentration of hydrogen ion [H+] in above formula.
pH = -log (1.87 x [tex]10^{-11} M[/tex])
pH = -log (1.87) -log ( [tex]10^{-11} M[/tex])
pH = -0.27 +11
pH = 10.73
Now, use the formula, pH +pOH = 14
pOH = 14 - pH
pOH = 14 - 10.73
pOH = 3.27
Now, use formula pOH = -log [OH-]
[OH-] = [tex]10^{-pOH}[/tex]
[OH-] = [tex]10^{-3.27}[/tex]
[OH-] = 5.3 ×[tex]10^{-4}[/tex] M
Therefore, the concentration of hydroxyl ion [OH-] will be 5.3 ×[tex]10^{-4}[/tex] M.
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Answer:
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Answer:
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Answer:
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(I learnt it in camp)
Answer:
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Dandelion Seed are light enough to be carried by the wind.
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Answer:
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Explanation:
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ii) Oxidizing agent?
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Answer:
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The reaction is violent but safe, provided the procedure is followed exactly. ... Chemicals. Magnesium powder (HIGHLY FLAMMABLE), 0.25 g (note 4); Copper(II) oxide powder ... top must NOT be hot when the magnesium powder/copper oxide mix is added. ... After one or two minutes (be patient) a vigorous reaction occurs.
You place a balloon in a closed chamber at standard temperature and pressure (STP). You triple the chamber pressure.
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Answer:
it pops?
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1
The table gives the composition of three particles
particle
number of
protons
number of
electrons
number of
neutrons
А
15
16
B
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с
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The number of solute particles and the concentration of the solution are being changed between the two solutions, but the volume is being held constant.
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Answers
mass of NaN₃ → moles of NaN₃ → moles of Na → mass of Na
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a. increasing the surface area of the solute
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please help
sorry if it’s a little hard to read
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Explanation:
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the answer should be six months
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b
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Explanation:I just did it
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Answers
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Have a nice day!
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connect capillaries and veins
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Answer:
carry blood away from the heart
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Answer:
I can list four. These are the main ones.
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Explanation:
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