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Chemistry Questions and Answers (Q&A)

Where is Phosphorus not found?
John Adney
Answered: Nov 02, 2017

The atmosphere because the phsphorus cycle only take splace with rocks, water, and soil.

2 Answers

337 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 A, 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...Read More

2 Answers

335 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

329 views
What does NH3 stands for?
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

324 views
How will the reaction equilibrium be affected by an increase in temperature for the following reaction? H2O2(l)  H2(g) + O2(g)    DH = +187 kJ
Raszagil
Answered: Mar 25, 2017
Should shift to the right, endothermic reaction because of the +187 kJ. Per Le Chatelier's Principle, an increase in the temperature of the system causes equilibrium to shift away from the heat to...Read More

3 Answers

316 views
What are the 3 types of compounds?
John Smith
Answered: Jan 18, 2021
A and B only

OsO4 of an alkene results in syn addition of alcohols to both sides of the double bond (which becomes a single bond). To get a meso compound, we need symmetry in the product of...Read More

1 Answer

315 views
Which three groups of the Periodic Table contain the most elements classified as metalloids (semimetals)?
Esthomas
Answered: Jan 18, 2021
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

315 views
Chemical Equation: Zn(s)+ CuSO4(aq) → Cu(s) + ZnSO4(aq)Mass of empty beaker: 0.97gMass of beaker + zinc before reacting: 1.17gVolume of copper(II) sulfate before reacting: 45.2 mLMass of dry...
matsonc
Answered: Jan 18, 2021
Chemical Equation: Zn(s)+ CuSO4(aq) Cu(s) + ZnSO4(aq) Mass of empty beaker: .97g Mass of beaker + zinc before reacting: 1.17g Volume of copper(II) sulfate before reacting: 45.2 mL Mass of...Read More

1 Answer

315 views
How many moles of calcium atoms are 2.5 moles of calcium carbonate CaCO3?
Ryanbecker
Answered: Jan 18, 2021
2.5 moles

1 Answer

313 views
How many atoms are there in this chemical formula? 2Fe{sub2}(SO{sub4}){sub3}
Moiz
Answered: Apr 30, 2018

34 is the correct answer

2 Answers

312 views
What are the Z and A values for atom of krypton which contains 46 neutrons?
Ryanbecker
Answered: Jan 18, 2021
Z=36, a=82

1 Answer

311 views
Why is octanol more soluble in water than octane is?
Regentschemistry
Answered: Jan 18, 2021
Octanol is a polar molecule, like water is, while octane is a nonpolar molecule. Since octanol and water have the same molecular polarities, based on "like dissolves like", octanol will dissolve in...Read More

1 Answer

308 views
What is the difference between Colloid and Suspension?
W. Kaye, Ex-Marine
Answered: Aug 22, 2019
Water solutions of a plethora of substances, quickly pass through plant or animal semipermeable barriers, while others such as gelatin do not pass through them. The first elements are called...Read More

2 Answers

301 views
Which of the following could be the pH of the solution? The table below shows a range of pH indicators along with the pH at which they change colors. A scientist needs to find the pH of an...
T. ADAMS, Senior Executive
Answered: Jun 13, 2019
The correct answer to this question is 5. The formula for pH is pH = -log[H+]. pH is used in chemistry, to identify how acidic or basic a solution is. This pH would be acidic because 5 is less...Read More

2 Answers

301 views
Which Substance has the Highest Resistance?
M. Parker, Internet Researcher
Answered: Dec 20, 2018
The opposition that a substance offers due to the flow of electric current is called resistance. Resistivity is the electrical opposition per unit length, area, or volume of an element....Read More

1 Answer

297 views

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