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- The osmotic pressure of 250mL of an aqueous solution containing 0.150g of the enzyme lysozyme is found to be 0.0013atm at 24.850 Calculate the molar mass of lysozyme.
- How many grams of Lactic acid (C6H10O5) should be dissolved in 650g of cyclohexane (C6H12) to raise the boiling point to 84.910C? The normal boiling point of cyclohexane is 810C and its molal boiling point is 2.75 0C/m.
- You add 1 kg of ethylene glycol (C2H6O2) antifreeze to 4500g of H2O in your car’s radiator. What would be the freezing point of the solution?
- A solution prepared by adding 10g of an unknown non-volatile, non-electrolyte solute to 150 g of water. The Boiling point of the solution is elevated by 0.433 0C above the normal boiling point of the solvent. What is the molar mass of the unknown substance?
- What is the vapor pressure of the pure solvent if the vapor pressure of a solution of 15g sucrose (C12H22O11) in 100g of ethanol (C2H5OH) is 58 mmHg?
Product of the String
You are given an alphanumeric string S.Write a program to multiply all the charcters(except trailing zeroes) in S and print the output.
Rules for multiplication:
- If the character is digit, multiply its value.
- If the character is an alphabetic character, multiply the product of digits of its ASCII value.
Input
The first line contains a string S.
Output
The output should be a integer denoting the product of characters.
Explanation
For N = 123a4
ASCII value of a is 97.
Product of digits of ASCII value of a is 9 *7 = 63.
Therefore the product of characters is 1*2*3*4*63*4 = 1512.
Sample Input1
123a4
Sample Output1
1512
- mL of nitric acid, HNO3, are required to react with 50 mL of a 1.25 M Barium hydroxide, Ba(OH)2 solution:
2 HNO3 (aq) + Ba(OH)2 (aq) --> 2 H2O (aq) + Ba(NO3)2 (aq)
Determine the concentration (Molarity) of the nitric acid solution (HNO3).
- How many mL of 0.250 M barium nitrate are required to precipitate as barium sulfate all the sulfate ions from 50 mL of 0.350 M aluminum sulfate?
3 Ba(NO3)2 (aq) + Al2(SO4)3 (aq) --> 3 BaSO4 (s) + 2 Al(NO3)3 (aq)
Constraints on the number of independently moving particles; i.e., on whether the particles must move as an aggregate or can move separately.How thermodynamic properties Entropy, would now respond to this constraints
Hydrogen peroxide (H2O2) is a powerful oxidizing agent used in concentrated solution in rocket fuels and in diluted solutions is hair bleach. An Aqueous solution of 25% (m/m) has a density of 1.05 g/ml. Calculate the concentration in terms of:
#340153 on Dec 2023