Incomplete lewis structures for the nitrous acid molecule, hno2, and the nitrite ion, no2-, are shown here. (a) complete each lewis structure by adding electron pairs as needed. (b) is the formal charge on n the same or different in these two species? (c) would either hno2 or no2- be expected to exhibit resonance?

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?

Read the chemical equation. 2c2h2 + 5o2 → 4co2 + 2h2o which of the following statements would be correct if one mole of c2h2 was used in this reaction? one mole of oxygen was used in this reaction. five moles of oxygen were used in this reaction. four moles of carbon dioxide were produced from this reaction. two moles of carbon dioxide were produced from this reaction.

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the independent variable in galileo's experiment? a. the speed of the ball b. the slope of the plane c. whether the ball moved d. what the ball was made of