How is oxygen and nitrogen alike

Which fossil occurs on the most landmasses? what does this suggest about when these particular continents broke up

What holds the two strands of a DNA molecule together? A. Ionic bonds between negatively and positively charged ionsB. Covalent bonds between sugars and phosphatesC. Brüno's interactionsD. Hydrogen bonds between complementary base pairs

How do scientists determine the number of neutrons in the isotope of an atom? They find the number of protons. They divide the atomic mass by two. They add the number of electrons and protons. They subtract the atomic number from the atomic mass.

Explain why certain parts of the Earth are more prone to earthquakes or volcanoes.

In a combustion experiment, it was found that 12.096 g of hydrogen molecules combined with 96.000 g of oxygen molecules to form water and released 1.715 * 103 kJ of heat. Calculate the corresponding mass change in this process. (1 J = 1 kg · m2/s2)

3. Infer A forgotten ice pop lies melting on a deck on a hot summer day. What is the direction of heat flow as the ice pop melts? Is the process endothermic or exothermic? Explain.

How do ionization energies provide evidence for the quantization of the energies of electrons?

What causes lightning? a) thunder b) an electric discharge c) rising warm air d) air masses meeting

In a problem, you are given two pressures and one temperature at constant volume and amount of gas. You are asked to find a second temperature. What law should you use?

How many cups are in a 5-lb. bag of flour?