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1. Why is it important to maintain biodiversity in ecosystems? What is prohibiting humans from doing so?
2. Why is the HIV virus a successful parasite?
Ethanol has {rm mp} = -114.5 ^circ {rm C}, {rm bp} = 78.4 ^circ {rm C} , Delta H_{rm vap} = 38.56 {rm kJ/mol} and Delta H_{rm fusion} = 4.60 {rm kJ/mol}. The molar heat capacity is 113 {rm J / left( K cdot mol right)} for the liquid and 65.7 {rm J..
Problem- Predict Zeff for the outermost electrons in the Rb atom based on the calculations for Na and K using Slater's rules.
Determine the molar concentration of silver nitrate(AgNO3) in a solution if titration of twenty five mili litres of the solution with 0.300M sodium chloride (NaCl) needs 37.05ml of the sodium chloride solution to reach the end point?
For the following sets of quantum numbers, determine which describe actual orbitals and which are nonexistent. For actual orbitals, enter correct. For nonexistent orbitals, give the identity of the quantum number that is impossible, entering n, l,..
Calculate the heat of formation of Magnesium oxide (MgO). Data given are: Mg(s) +2HCl (aq) ......> MgCl2 (aq) + H2 (g) ?H = 462 kJ/mol MgO(s) + 2HCl (aq) .......> MgCl2 (aq) + H2O (l) ?H
Does the type of fat used to make soap result in soap with different properties. What is the best choice of fat to use and why
Carbon dioxide makes up approximately 0.04% of the Earth's atmosphere. If you collect a 2.0L sample from the atmosphere at sea level (1.00 atm) on a warm day
What is the chemical reaction undergone during determination of alcoholic acidity of flour
Question- Complete the charge balance equation for an aqueous solution of H2CO3 that ionizes to HCO3- and CO32- State chemical question and provide explanation
A solution containing Pt4+ is electrolyzed with a current of 5.80 A. How long will it take to plate out 79% of the platinum in 0.50 L of a 0.010 M solution of Pt4+.
The concentrationof the alkane C20H42 (FM= 282.55) in a particular sample in rain water is 0.2ppb. Assume that the density of the rain water is close to 1.00 g/ml and find the molar concentration of C20H42.
Question- Carbon C is composed only of carbon, hydrogen and oxygen and shoes a molecular ion at m/z=180 amu. Carbon accounts for 60% of the molecular mass. a) Write a plausible molecular formula for compound C
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