16. Which description best matches Democritus's idea of the atom? a particle that cannot be divided or destroyed a particle split into equal portions a gel with small particles spaced evenly throughout it a combination of small particles joined together

Electric charge is what ? a. kinetic energy b. radiation c. discovery d. electricity

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.

You open a can of soda at room temperature and hear a hiss. which of the following factors has changed inside the container? a.) atmospheric pressure b.) temperature of gas c.) type of gas d.) amount of gas