For the same mixture, under the same conditions described in problem 7, calculate keq for 2nh3 (g) n2 (g) + 3h2(g). how is the keq for a forward reaction related to the keq for a reverse reaction
Answers
Answer: The relation between the forward and reverse reaction is
Explanation:
For the given chemical equation:
The expression of equilibrium constant for above equation follows:
.......(1)
The reverse equation follows:
The expression of equilibrium constant for above equation follows:
.......(2)
Relation expression 1 and expression 2, we get:
Hence, the relation between the forward and reverse reaction is
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Identify the correct formula for each of the following compounds? boron tribromide a. b3br b. bbr3 c. 3bbr
(2) 2.0 L of 2.0 M HCl(aq)
(3) 3.0 L of 0.50 M HCl(aq)
(4) 4.0 L of 0.50 M HCl(aq)
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Answer:
2
Explanation:
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Given:
Molar Mass HBr = 80.904g/mol
Density solution = 1.24 g/mL
27.7%(wt/wt) HBr
Total mass of solution = volume(density) = 100mL (1.24 g/mL) = 124 g solution
Mass HBr in solution = 124g(0.277) = 34.348 g HBr
Moles HBr in solution = 34.348/80.904 = 0.4246 moles HBr
Molarity = moles solute/L solution = 0.4246 moles HBr/0.1 L solution
Molarity = 4.246 M
(2) Group 2 (4) Group 17
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The oxidation state of an element is calculated by subtracting and the total sum of oxidation states of all the individual atom (excluding the one that has to be calculated) from total charge on the molecule. Option (1) is correct option.
What is oxidation state?
Oxidation state of an element is a number that is assigned to an element in a molecule that represents the number of electron gained or lost during the formation of that molecule or compound. Oxidation state is a unitless quantity.
Oxidation state of M in M₂O is:
Let oxidation state of M be X
Oxidation state of Oxygen is -2
Overall charge on the molecule is 0
so 2X+(-2)=0
X=+1
So from here we can see that oxidation state of M is +1 which is possessed only by group 1 element
Hence option (1) is correct option.
To learn more about Oxidation state, here:
#SPJ2
Therefore, (1) Group 1 is the correct answer because elements in group 1 have 1 valence electron.
Hope this helps~
b. 0.571
c. 0.569
d. 0.537
e. 0.214
Answers
Answer:
The concentration of CaCl2 in this solution is 0.564 molar (option A)
Explanation:
Step 1: Data given
Mass of CaCl2 = 23.7 grams
Mass of water = 375 grams
Density of solution is 1.05 g/mL
Step 2: Calculate total mass
Total mass = mass of CaCl2 + mass of water
Total mass = 23.7 grams + 375 grams = 398.7 grams
Step 3: Calculate volume of the solution
Density = mass / volume
Volume = mass / density
Volume = 398.7 grams / 1.05 g/mL
Volume = 379.7 mL = 0.3797 L
Step 4: Calculate moles CaCl2
Moles CaCl2 = mass CaCl2 / molar mass CaCl2
Moles CaCl2 = 23.7 grams / 110.98 g/mol
Moles CaCl2 = 0.214 moles
Step 5: Calculate concentration
Concentration of CaCl2 = moles / volume
Concentration of CaCl2 = 0.214 moles / 0.3797 L
Concentration of CaCl2 = 0.564 mol / L = 0.564 molar
The concentration of CaCl2 in this solution is 0.564 molar (option A)
b. radiometric dating.
c. dendrochronology.
d. radioactive dating.
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tree rings or dendrochronology they allow to use it in calibration for carbon-14 on temporal placements of fragments of wood (from long dead trees).
Example Bristle cone pines (1957) 4723 years old
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Hope I Helped You!!! :-)
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