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Moles to grams and Grams to moles
-How many moles are in 15 grams of lithium?
-How many moles of NaOH in a 200 g sample?
-How many moles of K2CO3 in a 100 g sample?
-Calculate the moles in a 5 gm sample of MgBr2
-Calculate the moles in a 100 g sample of Mg(OH)2
-Calculate the moles in a 250 g sample of Ca3(PO4)2
Derive an expression for the subsequent concentration of sodium chloride c in terms of c0, t, Q, and V. Make a sketch of c versus t and label the main features.
The heat of vaporization of CCl2F2 is 289 J/g. What mass of this substance must evaporate in order to freeze 180g of water initially at 25 C? The heat of fusion of water is 334 J/g; the specific heat of water is 4.18 J/gK.
The enthalpy change for the reaction below at 25oC is -1,850 kJ (per mole of C9H20). What is the internal energy change for the reaction at 25oC
While 4.33g of a nonelectrolyte solute is dissolved in water to make 205mL of solution at 21 C, the solution exerts an osmotic pressure of 891torr.
Consider a solution formed by mixing 51.0 mL of 0.100 M H2SO4, 27.0 mL of 0.100 M HOCl, 25.0 mL of 0.200 M NaOH, 25.0 mL of 0.100 M Ca(OH)2, and 10.0 mL of 0.150 M KOH. Calculate the pH of this solution.
What is a zymogen. How are they activated. Give an example. What is a transition state? And what is its relationship with the active site
what will be the final concentration of the seawater at 20 °C when reverse osmosis stops? Assuming that seawater has a total ion concentration (a.k.a colligative molarity) of 1.10 Mc, calculate how many liters of seawater are needed to produce 15...
at a particular temperature k 4.0 x 10-7 for the reaction n2o4g ---gt 2no2g. in an experiment 1.0 mol n2o4 is placed
List the basic solutions in order of increasing basicity. NH2OH, HNO2, C2H5NH2, NaNO2, and Ca(OH)2
A sample of pure calcium fluoride with a mass of 15.0 g contains 7.70 g of calcium. How much calcium is contained in 45.0 g of calcium fluoride
Discuss essential and non-essential amino acids. Explain why protein is described as being of primary importance.
2H2(g) + O2(g) --> 2H2O(l), delta H = -572 kJ. How much heat is evolved when 4.03 g of hydrogen is reacted with excess oxygen
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