top of page
Expert Chemistry, Biology, Physics and Math Tutoring Online and Bethesda,MD
646-407-9078
Search


What is the color of bromcresol green indicator in a solution with a pH value of 2.0?
What is the color of bromcresol green indicator in a solution with a pH value of 2.0? (1) blue (2) green (3) red (4) yellow Answer:...
5,018 views
0 comments
Which notations represent atoms that have the same number of protons but a different number of neutr
Which notations represent atoms that have the same number of protons but a different number of neutrons? (1) H-3 and He-3 (2) S-32 and...
3,633 views
0 comments
Which formula represents an asymmetrical molecule?
Which formula represents an asymmetrical molecule? (1) CH4 (2) CO2 (3) N2 (4) NH3 An assymetrical molecule is a molecule whose charge is...
8,575 views
0 comments
What is the number of moles of KF in a 29-gram sample of the compound?
What is the number of moles of KF in a 29gram sample of the compound? (1) 1.0 mol (2) 2.0 mol (3) 0.50 mol (4) 5.0 mol Answer and...
5,610 views
0 comments
A sample of gas is in a rigid cylinder with a movable piston. The pressure of the gas is kept consta
A sample of gas is in a rigid cylinder with a movable piston. The pressure of the gas is kept constant. If the Kelvin temperature of the...
4,336 views
0 comments


Which atom in the ground state has a stable electron configuration?
Which atom in the ground state has a stable electron configuration? (1) carbon (2) magnesium (3) neon (4) oxygen Answer and explanation:...
2,259 views
0 comments
A magnesium atom that loses two electrons becomes a
A magnesium atom that loses two electrons becomes a (1) positive ion with a smaller radius (2) negative ion with a smaller radius (3)...
8,418 views
0 comments
What is the oxidation number of manganese in KMnO4?
What is the oxidation number of manganese in KMnO4? (1) +7 (2) +2 (3) +3 (4) +4 Answer and Explanation: We can figure out the oxidation...
840 views
0 comments
Proteins, starch, and DNA are similar in that they are all
Proteins, starch, and DNA are similar in that they are all (1) organic compounds (2) parts of genes (3) made of amino acids (4) made of...
6,509 views
0 comments
When a chemical reaction is at equilibrium, the concentration of each reactant and the concentratio
When a chemical reaction is at equilibrium, the concentration of each reactant and the concentration of each product must be (1)...
1,562 views
0 comments
Looking for Chemistry Tutoring?
I tutor all levels of chemistry including general and organic chemistry.
bottom of page