What is required for an electron to move between energy levels?

If the total mass of the products of a reaction is 250 g, what was the total mass of the reactants

Can you identify the 4th most abundant element in the universe?

8. How many liters of oxygen gas will be produced by the decomposition of 100.0 grams of sodium nitrate? (Note: 1 mole of any gas at STP will have a vol = 22.4 liters.) 2 NaNO3 → 2NaNO2 + O2

Which 0f the following describes the electron sharing between hydrogine and flourine

2) 800mm of Hg to Kpa

Why are 3 ammonium groups needed for every 1 nitride ion?

How do you explain the relativity high conductivity of tap water compared to a low or zero conductivity for distilled water

According to Newtons's first law, which characteristic of a moving object would remain constant if there were no other force of acting of it? A. Size B. Mass C. Shape D. Speed

Standard reduction potentials are 1.455 V for the PbO2 (s) / Pb (s) couple, 1.82 V for Co3 (aq) / Co2 (aq), 3.06 V for F2 (g) / HF (aq), 1.07 V for Br2 (l) / Br - (aq), and 1.77 V for H2O2 (aq) / H2O (l).

Which compound is inorganic? a. glucose (c6hl2o6) b. carbon dioxide (co2) c. ethane (c2h6) d. stearic acid (cl8h36o2) ?