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12 Dec 2019

If the molecular weight of acetanilide is 135.17 g/mol, what amount (mol) of nitronium ion is required? mol (2 sig figs) Using the equation from question 6: If the molecular weight of nitric acid is 63.01 g/mol and its density is 1.5129 g/mL, what volume (mL) of nitric acid is required? mL (1 sig fig) If the molecular weight of sulfuric acid is 98.08 g/mol and its density is 1.84 g/mL, what volume (mL) of sulfuric acid is required? mL (2 sig figs). equation 6 is the balanced equation of formation of nitronium ion

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Hubert Koch
Hubert KochLv2
13 Dec 2019

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Related questions

3. Deoxyribonucleic Acid (DNA) is thought to be the chemicalcompound responsible for the process of heredity. A sample of DNAwas found to have density 1.10g/cm3 and its molecular weight wasestimated to be 3.04 X10 8th g. What is the average volume occupiedby one DNA molecule?

My strategy:
1) Find volume of one molecule = mass of one molecule/density ofDNA
2) Must convert DNA molecular weight (weight of one mole of DNA) tomolecules then divide that by the density.
3) Answer in 3 sig figs.


[(3.04 X 108 g/1mol DNA) X (1 mol DNA/ 6.022 X 1023molecules)]/1.10 cm3 = 4.5892 X 10-16 cm3


Answer: The average volume of one molecule of DNA is 4.59 X 10-16cm3

Have I done this right?

Question #4

The manufacturer of vinegar used in this experiment claims that the vinegar contains 5% acetic acid by weight. Use your results, the molecular weight of HC2H3O2 and a density of 1.0 g/mL to determine if this claim is true or false.

please answer the following:

a) Penicillin was discovered in 1928 by Alexander Fleming, who was a bacteriologist at the University of London. This molecule was originally isolated from a mould that contaminated some of Fleming's experiments. Penicillin destroys bacterial cells without harming animal cells, so it has been used as an antibiotic and has saved countless lives. The molecular formula of penicillin G is C16H18N2O4S.

- Calculate the molar mass of penicillin G.

-How many moles of penicillin are in a 91.7 mg sample?

- How many carbon atoms are in a 91.7 mg sample?

- What is the mass of sulphur in a 91.7 mg sample?

b) A 12.4 mL sample of vinegar, containing acetic acid, was titrated using 0.563 M NaOH solution. The titration required 19.90 mL of the base. What was the molar concentration of acetic acid in the vinegar? Assuming the density of the vinegar is 1.01 g/mL, what was the percent (by mass) of acetic acid in the vinegar?

write the balanced chemical equation for the reaction. Be sure to include the appropriate phases for all reactants and products.

c) A solution prepared by dissolving 1.9 mol sulfuric acid in 77 mL of solution. Calculate the molarity

d) 29.9 mL of 0.370 M CaCl2
mol Cl- Calculate the number of moles

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