#regentschemistry

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:...

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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...

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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...

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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...

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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...

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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:...

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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)...

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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...

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...

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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)...

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