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2.If the pH of a solution is 4.2, what is the concentration of Mg(OH)₂? Also could you please show ...

me how you got to the answer please, thanks.

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already have the data. I just need help with the last part.

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ard free energy G° by 18 kJ/mole, with A* having the higher G°.
Use the table below to find how many more molecules will be in state A* compared with state A at equilibrium.
If an enzyme lowered the activation energy of the reaction by 11.7 kJ/mole, how would the ratio of A to A* change?
Table: RELATIONSHIP BETWEEN THE STANDARD FREE- ENERGY CHANGE, ∆G°, AND THE EQUILIBRIUM CONSTANT
Hint: ∆G° represents the free-energy difference under standard conditions (where all components are present at a concentration of 1 mole/litter). From this table, we see that if there is a favourable free-energy change of –17.8 kJ/mole for the transition Y→ X, there will be 1000 times more molecules of X than of Y at equilibrium (K = 1000).

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at would have been the concentration of HNO3 AFTER the 0.1000g of Li was added and allowed to react with some of HNO3? (Hint - Lim XS Problem) What would have been the pH of your acid solution after the metal was added?

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r litre?
What would have been the concentration of HNO3 AFTER the 0.1000g of Li was added and allowed to react with some of HNO3? (Hint - Lim XS Problem) What would have been the pH of your acid solution after the metal was added?
If you wanted to fill a rubber balloon to an internal volume of 5.000L and pressure of 140.0kPa in a 25.00C room with hydrogen gas from the reaction of your metal and acid (Li and HNO3), what is the minimum quantity in millilitres of an 8.000M solution of your acid you would need to generate enough hydrogen gas? (assume you have more than enough metal).

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es per litre? What would be the pH of the above solution? What would have been the concentration of your acid AFTER the 0.1000g of your metal was added and allowed to react with some of your acid? (Hint - Lim/excess Problem)

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0.962 M compound A is allowed to equilibrate, what is the equilibrium concentration of compound C in molarity? Do not include unit. Keep 3 decimal places in your answer.

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9.Consider the reaction. A(aq)↽−−⇀2B(aq)kc=8.67×10−6 at 500 K If a 2.50 M sample of A is heated to ...

f A is heated to 500 K, what is the concentration of B at equilibrium?

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10.Hi there, I've been struggling with the problem for quite a while and i have not been able to find ...

formula online to help.. It should be a simple straightforward problem but i just can not for the life of me figure it out. are you able to provide me with a formula or point me in the right direction?
The problem is:
Solution A has a 50% concentration
Solution B has a 100% concentration
Solution C has a 5% concentration
you have 5L of each solution to utilize as well as unlimited quantities of water to dilute solution concentrations if needed.
Part A
Make a final solution of 100ml with solution concentrations of Solution A 15%, solution C 5% and solution C 80%. how much of each solution will you need to make your final 100ml solution?
Part B
using the above solutions how many 100ml final solutions can you produce with the 5L volumes?
No matter how I work it i can't make the solution to the correct concentrations.
Thank you for your help.
John

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11.Hi there, I've been struggling with the problem for quite a while and i have not been able to find ...

formula online to help.. It should be a simple straightforward problem but i just can not for the life of me figure it out. are you able to provide me with a formula or point me in the right direction?
The problem is:
Solution A has a 50% concentration
Solution B has a 100% concentration
Solution C has a 5% concentration
you have 5L of each solution to utilize as well as unlimited quantities of water to dilute solution concentrations if needed.
Part A
Make a final solution of 100ml with solution concentrations of Solution A 15%, solution C 5% and solution C 80%. how much of each solution will you need to make your final 100ml solution?
Part B
using the above solutions how many 100ml final solutions can you produce with the 5L volumes?
No matter how I work it i can't make the solution to the correct concentrations.
Thank you for your help.
John

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nd F– are each 2.6 10–3 M and the concentration of HF is 0.010 M, what is Ka for HF?

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side A of a membrane is 7 mM and the concentration of sodium on side B is 175 mM. 2. If in the situation above sodium is at equilibrium, what is sodium’s contribution to the membrane potential? Which side of the membrane has the more positive charge on it? " Thank you for your help :)

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t for steamers. I got this: https://www.gastrro.pl/media/catalog/product/cache/1/image/9df78eab33525d08d6e5fb8d27136e95/6/4/648050.jpg Ingredients: phosphoric acid (V), anionic surfactants less than 5%. Lately my mother/father was cleaning the steamer for food with it and today I've noticed the black residue on the bottom of the water in steamer and I've been eating vegetables from that steamer for like many days and just adding water, didn't replace it fully. Wondering if that could impact my health somehow. I'm a bit nervous, thanks.

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y we get M=1/24
Is this correct or am I missing something
And is it correct for all compounds and elements ... but we can’t give a fixed value for a concentration of a substance how can all substances have the same concentration at rtp

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C'(t) = -1.2e^-.01t, where t is the number of hours after injection.
A. How fast is the lidocaine changing after 3hrs.
b. If the originial dose was 5milligrams/mL, determine the formula for the concentration of lidocaine in the first t hours.

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17.I was wondering if you could help me step up my chem problems, i'm not sure how to begin ...

estion 1: Draven collected a 1ml sample from a local river. Draven added 99 ml of water to the sample. Draven then took 5 ml of the diluted sample, and determined the 5 ml sample to contained 10 mg of sodium chloride. what is the concentration of sodium chloride in the river?
question 2: how many grams of H2 could be produced when 13 g of H202 decompose?
question 3: how many molecules of carbon dioxide could be produced when 25 ml of a 0.8 M ethanol, c2h60, combusts with 5.18X10^23 molecules of oxygen? the unbalanced equation for the combustion of ethanol is given below:
2ch6O+302-> c02+h20

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of a membrane is 7 mM and the concentration on side B of the membrane is 175 mM, what direction will sodium want to move? Part 2 of the question: If in the situation mentioned, sodium is at equilibrium, what is sodium's contribution to the membrane potential? Which side of the membrane has the more positive charge on it?

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of a membrane is 7 mM and the concentration on side B of the membrane is 175 mM, what direction will sodium want to move? Part 2 of the question: If in the situation mentioned, sodium is at equilibrium, what is sodium\''s contribution to the membrane potential? Which side of the membrane has the more positive charge on it?

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, What would be the predicted concentration of HCB due to bioconcentration in the fat of fish that swim in water containing 0.00006 ppm of the chemical?
2. The fat content of breast milk averages a little over 4.0 g per 100 ml. Calculate the mass of DDE that would have been ingested by a typical breast-fed infant in 1972 consuming 300 ml of breast milk per feeding, if the milk contained about 500 ppb of DDE in its fat content.
3. The PCB concentration in Lake Michigan is declining according to a first-order rate law having a rate constant of 0.078 year-1. If the PCB concentration in the lake averaged 0.057 ppt (parts per trillion) in 1994, what was the concentration in 2004? In what year will the concentration fall to 0.005 ppt.

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1.AU MAT 120 Systems of Linear Equations and Inequalities Discussion

mathematicsalgebra Physics