300 Best Chemistry Questions and Answers (Q&A) - ProProfs Discuss

B. Strickland, Sales Manager
Answered: Jun 10, 2019

The NH3 is the chemical formula for a compound of Nitrogen and Hydrogen called ‘‘Ammonia’’. Ammonia is a colorless gas with a characteristic pungent smell. It has a molar...Read More

1 Answer

492 views

What subatomic particle among electron, alpha particle, neutron, proton is the heaviest?

Marshall_Bailey
Answered: Apr 26, 2024

Neutron

1 Answer

489 views

What is the final temperature of the mixture in the following scenario?

Ochiengj
Answered: Apr 26, 2024

2.24 0C

Solving: 10.0 g 333 J/g = -25.0 g 4.18 J/g 0C (T 35) 0C, 104.5 T = 3657.5 3330, T = 3.13 0C

1 Answer

487 views

Which three groups of the Periodic Table contain the most elements classified as metalloids (semimetals)?

Esthomas
Answered: Apr 26, 2024

14, 15, and 16

Go to the Periodic Table and note the location of the stepped line dividing metals and nonmetals. Elements next to the left or right of this line are metalloids. Choice three...Read More

1 Answer

485 views

How would you define mass?

John Smith
Answered: Apr 26, 2024

Mass is determined by comparing the mass of an object with a set of standard masses that are art of a balance

1 Answer

485 views

How would you describe the molecular polarity and the charge distribution of CF4?

Regentschemistry
Answered: Apr 26, 2024

Nonpolar molecule, symmetrical distribution of charge

Polar Molecules=Less than 2 lines of symmetry, asymmetrical distribution of charge and asymmetrical shape. Nonpolar Molecules=2 or...Read More

1 Answer

485 views

Can all metals conduct electricity?

J.Barbara
Answered: Mar 07, 2018

All metals are conductors of electricity, however, each type of metal has different conductivity level, and thus, some are more conductive than the other. For example, the Copper metal is one of...Read More

2 Answers

484 views

How many atoms are present in methane?

Jordan
Answered: Apr 05, 2018

Hey actually Adney is correct there are 5 atoms in a methane molecule, 4 hydrogen and 1 carbon which totals at 5 atoms.

3 Answers

481 views

What is the difference between isotopes of hydrogen?

CECHS
Answered: Apr 26, 2024

The number of neutrons and the mass number

1 Answer

478 views

What is the correct chemical formula for iron(III) sulfate?

J. Harty, Writer
Answered: Mar 28, 2019

The correct answer to this question is Fe2(SO4)3 which is the chemical formula. The IUPAC name is iron(III) sulfate, which is determined by the set of rules that provide compounds with their name...Read More

2 Answers

477 views

What is the difference between Nostoc and Anabaena?

C. Bernthal, Teacher
Answered: Jun 18, 2019

Nostoc and Anabaena are two different types of colonies that may sometimes be interchanged because of their similar features. One of the most noticeable differences that you will see is their...Read More

1 Answer

475 views

What is the rank of the following carbocations in order of increasing stability?This question is part...

J. Shatner, Content writer
Answered: Feb 11, 2019

Carbocations in chemistry is known as the carbon atoms that are positive and are ions. Hence, the name is similar to the description of carbocations. These are believed to be alkanes and can...Read More

2 Answers

460 views

What is the pH of a solution whose pOH is 11.09?

CECHS
Answered: Apr 26, 2024

2.91

1 Answer

460 views

What factor is responsible for the increase in the rate of physical adsorption?

J. Shatner, Content writer
Answered: Oct 11, 2018

Option B - increase in pressure.
The extent of adsorption is directly proportional to the pressure. Therefore, increase in pressure will cause increase in rate of adsorption. Keep in...Read More

3 Answers

447 views

How is it prepared?

John Smith
Answered: Apr 26, 2024

Take 0.83 mL of 12 M HCl and add it to a graduated cylinder; add distilled water to the 100 mL mark to get a .1 M solution.

(molarity 1) (Volume 1) = (molarity 2) (volume 2) (12 M HCl)...Read More

1 Answer

435 views

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