Other Chemistry Answers

What are term symbols?

Illustrate what is an electromagnetic radiation. Define various parameters associated with it.

a) What is primary isotope effect? How is it different from the secondary isotope effect? Explain with the help of an example of electrophilic substitution in aromatic compounds



b) What do you understand by ortho directing activator and deactivator and meta directing deactivators.

Explain how to make up 600 ml of 0.2 M sodium hydroxide solution.

a) What is difference between basicity and nucleophilicty? Discuss the structural features which affect the basicity of a molecule.



b) How can you study the mechanism of the reaction by isotopic study? Explain it with the help of suitable example.

what is the mass in grams of NH4Cl present in 50.0ml of a 0.800 M NH4Cl solution?

How many formula units are in 7.9 moles of lithium fluoride?

*Give your answer using scientific notation and no spaces. For example 6.02x10^23 or 8.96x10^24

*Round to the appropriate number of Significant Figures*


How many molecules are in 15 moles of carbon dioxide?

*Give your answer using scientific notation and no spaces. For example 6.02x10^23 or 8.96x10^24

*Round to the appropriate number of Significant Figures*


Convert 3.050x10^38 atoms of Iron to moles.

*Rounded to the HUNDREDTH*


Convert 1.20x10^24 formula units of NaCl to moles.

*Rounded to the HUNDREDTH*


Convert 6.02x10^22 molecules of Br2 to moles.

*Rounded to the HUNDREDTH*


Convert 1.00x10^9 formula units of PbO2 to moles.

*Rounded to the HUNDREDTH*

How many atoms are in 11.5 moles of carbon?

Rounded to the appropriate number of Significant Figures. Give answer using scientific notation.

Phenylacetic acid. (C6H5CH2COOH,HPAc) is one of the substance that builds in the blood of person with phenylketonuria, an inherited disorder, that if untreated, causes mental retardation and death. In study of its properties, a biochemist finds that the ph of 0.12 M HPAc is 2.60. What is the Ka of HPAc?