Compared to the charges of a proton the charge of an electron has

1. a greater magnitude and the same sign

2. a greater magnitude and the opposite sign

3. the same magnitude and the same sign

4. the same magnitude and the opposite sign

Which of the following is true for a reliable scientific source? It cites logic It cites opinions. It cites valid data. It cites common sense.

How much heat is required, in calories, to raise the temperature of 57.8g of silver from 17.0oC to 43.5oC, if the specific heat of silver = 0.057cal / goC?

Balance these equations N2 + O2 > NO

Which substance can not be decomposed by a chemical change? A. Ammonia B. Carbon C. Methane D. Water

Which kind of bonds are found in a sample

What does LeChatelier's principal mean

How many milliliters of a 0.7% stock solution are required to make 2 l of 0.2% solution? how many ml of solvent will be required to carry out the dilution?

What percentage of the naphthalene molecules emitted a photon?

In an endothermic reaction, heat is absorbed from the surroundings. How does this affect entropy? A. The particles in the surroundings move slower and have decreased entropy. B.

The temperature of a sample of liquid water changes from 50°C to 30°C. Which statement best explains the change that must happen at the molecular level? A. The molecules move more quickly and their average kinetic energy increases. B.