If the mass of br-81 is 80.9163 amu, what is the mass of br-79?

The Second Law of Thermodynamics states that the total amount of entropy in the universe is

A steel tank filled with 62.7 L of nitrogen gas at 85.0 atm and 19°C is heated to 330°C. What is the gas pressure? _atm.

Nitrogen gas reacts with hydrogen gas to produce ammonia gas. Write a balanced chemical equation for this reaction.

Which statement describes a 0.01 M LiOH (aq) solution? a. The solution is basic with a pH less than 7. b. The solution is acidic with a pH greater than 7. c. The solution is acidic with a pH less than 7. d.

What will happen if a normal cell is placed in a hypotonic solution? g?

Where did the earth hold most of its original water

Giovanni created this chart to study for an exam. A 2-column table titled common ionic compounds. The first column labeled compound has entries sodium hydroxide (N a O H), iron oxide (F e O), calcium chloride (C a C l subscript 2), calcium carbonate

Consider the two electron arrangements for neutral atoms A and B. What is the difference between atom A and atom B? A - 1s22s22p63s1 B - 1s22s22p65s1 Atom B has lost some inner electrons.

Choose all the answers that apply. Which of the following has kinetic energy? rolling ball, moving car, book on a table, spinning top, or a falling tree.

Which of the following statements about the suns feature is true?