Other Chemistry Answers

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?

Draw lewis dot structure for the following PO2F2; SOCL2 ;HCOF; IHSO4-

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?

The conjugate of ammonia NH4+, is a weak acid. If a 0.200 M NH4Cl solution has a pH of 5.0, what is the Ka of NH4+?

0.541 mol of C12H22O11 is dissolved in water to make 0.223 L of solution. What is the molarity of this solution