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How many milliliters of 1.30 M KOH solution would be required to give 6.06 g of KOH to a chemical reaction? Find osmolarity of the solution containing 0.3 M Ca(NO3)2 and 0.1 M Sucrose?
What concentration must you dilute stock to so that you only have to add 2uL of Arsenic to your 1mL of cells to have 5nM concentration of Arsenic?
You require to make the stock solution of medium for the culture cells, which normally includes liquid salt solution and bovine serum.
The molecular weight of anhydrous calcium chloride is 110.99. How many grams do you need for 100 ml of 50 mM calcium chloride?
The molecular weight of sodium hydroxide is 40.00. How many grams would you require for 150 ml of a 1mM solution?
To make up the solution of phosphate buffered saline (PBS). How many grams of each will you require to make up 500mL of PBS?
You only wish to add 2µL of vincristine solution to the cells. What concentration must you make the stock solution of vincristine to make the 2uL addition?
A 20.00 mL aliquot of 0.120 M Cu+ solution is titrated with 0.100 M solution of Ce4+ according to following reaction: Find cell potential at each of the given volumes of added Ce4+?
Is bond energy of X2 positive or negative quantity? Why? Assume ΔH for reaction is -500 kJ/mol. Evaluate bond energy of the X2 molecule.
If atom X is represented by sphere on left below, which other three spheres would probably represent X-anion. Explain your choice.
If sphere on left below represents metal atom M, which of other three spheres would probably represent M+ cation? Describe your choice.
A swimming pool, 20.0 m ? 12.5 m, is filled with water to depth of 3.71 m. If initial temperature of water is 18.5°C, how much heat must be added to water to raise its temperature to 28.3°C?
Sketch four different Lewis electron-dot formulas for SeO2 molecule. One must have two single bonds, two have single and double bond, and one two double bonds.
Does this Lewis formula obey octet rule? Describe. Write the formal charges on atoms? Try describing bonding for the formula in valence bond terms.
What suggestion would you give to any other individuals or drivers coming on scene? What would you say to next responders coming on scene?
Explain mass and weight. Write the differences between them? Few ideas for responses might be: Go step further and explain how mass is associated to density and volume.
Research and explain the Rutherford experiment. Explain how it was performed and what was concluded from results and why.
Explain Dalton's theory. What are all of the postulates? With recent discoveries about nature of the atom, does it still apply today?
If 5.00x10^3 kg each of NH3, O2, and CH4 are reacted, what mass of HCN and of H2O be produced, supposing 100% yield?
Write three ways in which yield of ammonia in reaction above can be improved for given amount of H2. Additionally, describe principle behind each method.
You should make 100 ml of 0.25 M HCl to do DNA extraction experiment. How much of 37.0% HCl concentration stock do you need to make this solution?
Suppose that you work at company which prepares chemical solutions. Find out the following: Mass percentage of solution for customer in hospital.
What is the importance of limiting reactant. Explain how it is found and what it tells us about amount of product which can be formed.
What may occur to large (i.e., 30-50lb) container of trichloro-s-triazinetrione, or calcium hypochlorite, if it is left to sit in water and muck remaining in building after fire fighting efforts ha
What is the most probable reason OSHA requires employers to protect flooring and handling areas in buildings against impregnation by ammonium nitrate.