Which formula represents a polar molecule?

(1) Br2 (3) CH4

(2) CO2 (4) NH3

Select the set of quantum numbers that represents each electron in a ground‑state be atom. n = 1, l = 0, ml = - 1, ms = 1/2 n = 2, l = 0, ml = 0, ms = - 1 n = 1, l = 0, ml = 0, ms = 1/2 n = 1, l = 0, ml = 0, ms = - 1/2 n = 2, l = 0, ml = 0, ms =

How much tin (Sn) is in 5075 atoms of tin?

Our bodies are not very efficient. what happen to most our energy

What kind of bond is most common in organic compounds

Reducing the volume of a contained gas by one third, while holding temperature constant, causes pressure to Question 1 options:

Which equations represent precipitation reactions? More than one can be chosen. A. Na2S + FeBr2 → 2NaBr + FeS B. MgSO4 + CaCl2 → MgCl2 + CaSO4 C. LiOH + NH4I → LiI + NH4OH D. 2NaCl + K2S → Na2S + 2KCl E. AgNO3 + NaCl → AgCl + NaNO3

The amount of massin a given volume of air is

What is the molarity of a solution that contains 612 grams of CaCl2 in 3.04 liters of solution? 1.81 M 201 M 5.52 M

What is the empirical formula for naphthalene

Explain why a piece of aluminum or magnesium can be used to remove tarnish, which is mostly silver sulfide, on silverware.