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Calculate the consentration of CN- and the PH for a solution that is made by mixing 50mL of 0.1M HCIO4 with 4.2mL of 0.438M NaCN. Assume HCIO4 to be a strong acid, NaCN to be a strong electrolyte ( dissociates completely ) and the pKa for HCN to be 9.21?
The Group 5A elements can form molecules or ions with thre, five or six covalent bonds. Predict the molecular structure and hybridization of the following substances: NH3, AsCl5 and PF6-.Why does't NF5 or NCl6- form
Calculate the mass of the protein that must be dissolved in 40 mL of water to obtain this concentration
Write the chain propagation steps for the formation of dichloromethane in the chlorination of methane
For the equilibrium reaction 3C(s) + 4H2(g) C3H8(g), delta S = -269 J/mol*K delta H=103.8kJ/mol, calculate the equilibrium constant at 25 degrees celsius for the reaction
Which of the following is a use for nuclear energy?
Write a reaction for the formation of a peptide bond between alanine and serine. React the amino group of alanine with carboxyl group of serine. Remember that there are 2 products in this reaction.
constitutionally isomeric ketones that have the molecular formula C4H8O2
Olympic cyclists fill their tires with helium to make them lighter. A cyclist filled her bicycle tire, which has a volume of 855 mL, to a pressure of 8.5 atm at 25 C with helium.
Given the reaction: Ca + 2H2O -> CA(OH)2 +H2 What is the total number of moles of Ca needed to react completely with 4.0 moles of H2O?
Consider a solution containing 4.95 mM of an analyte, X, and 1.79 mM of a standard, S. Upon chromatographic separation of the solution peak areas for X and S are 3569 and 10981, respectively. Determine the response factor for X relative to S.
what is the mass in grams of A) 6.21 mol of KBr B) 10.2 mmol of PbO C) 4.92 mol of MgSO4 d) 12.8 mmol of Fe(NH4)2(SO)4 6H2)
How many grams and pounds of washing soda are needed to remove the hardness from 500 gallons of water that has a hardness of 150 ppm CaCO3?
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