Which of the following most likely happens during a chemical change?

No new substances are formed.

Properties of a substance remain unchanged.

Composition of a substance is same as before.

Different atoms than before are introduced after the change.

If the actual yield of the reaction was 75% instead of 100%, how many molecules of O2 would be present after the reaction is over? The# of No2 molecules is 8 if it goes through completion and NO is the limiting reactant.

Which resonance structure would most likely create the infrared (IR) spectrum for the equilibrium geometry calculation of SCN - SCN - in Part F. 1? both resonance stuctures [ S - C ≡ N ] - [S-C≡N] - neither resonance structure [ S = C = N ] -

What might be the result if you did not grind the two initial reactants sufficiently? A. Yield would decrease, but purity would not be affected. B. Both yield and purity would decrease. C. Yield would not be affected, but purity would be decreased.

What are the four elements that make up 96% of all living matter?

A semipermeable membrane has a 2 percent salt solution on one side and a 15 percent salt solution on the other side. what will most likely occur?

What word cannot be used to describe this organism?

Indicate the mechanistic symbol (SN1, SN2) that is most consistent with the following statement. Select the single best answer. The substitution product obtained by the solvolysis of tert-butyl iodide in methanol arises by this mechanism

What will happen if we burn carbon monoxide In a closed room?

What elements does silver have.

What is the mass of 1 mole of carbon dioxide CO2?