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Chemistry Answers to Questions

The Chemistry answers to questions is an excellent online resource available for students.Students can get Chemistry answers to questions here. They can get all the help required with the understanding of the concepts and answering questions associated with the topic from the expert ChemistryTutors available online.Students can avail all the help they need online on Chemistry with Chemistry help.

Get Free Chemistry Answers

Students can get free Chemistry answers to all their Chemistry questions and problems. The students can get the help of the online Chemistry tutors for getting answers to their questions. They can get help with their homework questions on Chemistry and also with other Chemistry related questions. They can also submit their questions online and they will get the answers from the tutors with elaborate explanations.

The Chemistry answers covers the following topics and many more topics under Chemistry:

  • Atomic and Molecular Structure
  • Chemical Bonds
  • Chemical Thermodynamics
  • Gases and their Properties
  • Acids and Bases
  • Solutions
  • Chemical Equilibrium
  • Reaction Rates
  • Conservation of Matter and Stoichiometry
  • Nuclear Processes
  • Organic and Biochemistry

Examples of Chemistry Questions and Answers

Here are some examples of chemistry questions and answers:

Example 1: Find the number of neutrons in the nucleus of an element whose atomic number is 19 and atomic weight is 39.

Solution: Since atomic number is 19, i.e., it contains 19 electrons in the orbits and 19 protons in the nucleus.

But atomic weight = number of protons + number of neutrons 39 = 19 + number of neutrons Number of neutrons = 39 - 19 = 20

Example 2: An element has atomic number 30 and its mass number is 66. Find out the number of protons and neutrons in its atom.

Solution: Atomic number = number of protons= 30

Number of neutrons = Mass number - atomic number = 66-30 = 36

Objective type questions:

1. The most dangerous method of preparing hydrogen would be by the action of HC1 and :

(i) Zn (ii) Fe (iii) K (iv) A1

2. H2 from HC1 can be prepared from:

(i) Mg (ii) Cu (iii) P (iv) Hg

3. The composition of the nucleus of deuterium is :

(i) One electron, one proton (ii) One proton, one neutron

(iii) One neutron, one electron (iv) Two protons, one electron

4. Metals like platinum and palladium can absorb large volume of hydrogen under special conditions. Such absorbed hydrogen by the metal is known as :

(i) Absorbed hydrogen (ii) Occluded hydrogen

(iii) Reactive hydrogen (iv) Atomic hydrogen

5. Hydrogen is evolved by the action of cold dilute HN03 on :

(i) Fe (ii) Cu (iii) Mn (iv) Se

ANSWERS

l.(iii) 2. (ii) 3. (ii) 4. (ii) 5. (iii)

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