I was playing around with tan(4*arctan(x))=2 and noticed x^2-x-1 and x^4-5*x^2+5 were in the solutions. It just seemed strange to me. Do identities work on these? Why is it adding/subtracting...

I was playing around with tan(4*arctan(x))=2 and noticed x^2-x-1 and x^4-5*x^2+5 were in the solutions. It just seemed strange to me. Do identities work on these? Why is it adding/subtracting...

Sulphuric acid is sold in standard stock solutions of concentration 14.5M. A teacher needs to prepare 175 ml of a 2.3M solution of sulphuric acid.

Dissolved oxygen gas levels in a polluted lake have dipped dangerously low to a concentration of 8.023•10^-4 M

Give example and description

A student prepares a 250 ml of 1.35 M solution of magnesium chloride for an experiment. His lab partner accidentally dilutes the solution with an additional 125 ml of water

You need 350 mL of a 50% alcohol solution. On hand, you have a 25% alcohol mixture and a 60% alcohol mixture. How much of each mixture will you need to obtain the desired solution?

Using the numbers 2,5,6 how can I get a total of 14. You can only use the numbers once.

x2+x-12

Explain ‘chemical equilibrium’ and ‘Le Chatelier’s principle’ ,respectively.Now changes of the reaction conditions A or B are given to the chemical reaction eq.①. Which direction does the chemical...

Y=3x-4 -3y=-9x+12

An experiment calls for 50 mL of a 0.5 M aqueous solution of sodium hydrogen carbonate. Describe how you would make up such a solution?

How do I know if this has One, Two, or No Real Solution? -3x^2 + 5x - 1 = 0

Calculate the boiling point, in degrees celsius (°C), of a 4.2mole/kg aqueous solution of Al(NO3)3. Assume you are at sea level. Round your answer to three significant figures. Include the unit in...

I don't know how to do this please help me

It is from the chapter solutions

The sum of 2 numbers is 65. One number is 4 times bigger than the other number what are the numbers.

The sum of 2 numbers is 65. One number is 4 times bigger than the other number what are the numbers.

how many mg are there in one dose?

A chemist needs 4 liters of a 12% acid solution. He has a 10% solution and a 20% solution available to form the mixture. How much of each should be used to form the 12% solution?

How much solution do I need to get 30% of solution of 200 gallons.

What would you expect to see in a beaker containing a solution of the weak electrolyte acetic acid (CH3COOH), and in a separate beaker containing a solution of the strong electrolyte Potassium Chloride...