31. The mass number of a nucleus is:

a) always less than its atomic number: b) the sum of the number of protons and neutrons present in

the nucleus; c) always more than the atomic weight; d) a fraction.

5 Fe2 + (aq) + MnO4 - (aq) + 8 H + (aq) ⟶ 5 Fe3 + (aq) + Mn2 + (aq) + 4 H2O (l) determine if each of the following statements is True or False. 1) MnO4 - (aq) is the oxidizing agent. 2) Fe2 + (aq) gains electrons. 3) Mn2 + (aq) is the reducing agent.

What kind of solvent (s) should be used to dilute magnesium nitrate and why?

What is the chemical reaction for Mg + NaOH also with the ionic equations and subscripts?

Which is the correct order in the levels of organization? Leap Year Cell, Tissue, Organ, Organ System, Organism Cell, Organ, Organ System, Tissue, Organism Cell, Organ, Tissue, Organ System, Organism

What will happen to the temperature in the room if a window air conditioner is on the ground?

Which bond other than the c-c bond is the least polar in the molecule?

The warmest temp ever measured in the us is 134 degrees F. Convert that temp to C and K

Compared to the oceanic crust the continental crust is usually

What is the study of matter called? O A. Chemistry O B. Philosophy O O C. Biology D. Physics

What impact do the amounts of available energy, water, and oxygen have on an ecosystem?