1.) How many periods are on the periodic table? Are periods the columns or the rows on the periodic table?

26. Classify each chemical equation as a combination/synthesis, decomposition, single replacement, double replacement, or combustion. a. Pb (s) + Hg2SO4 (s)  PbSO4 (s) + 2 Hg (l) b. NaCl (aq) + AgNO3 (aq)  AgCl (s) + NaNO3 (aq) c.

A cylinder of iron has a mass of 23.45 g. If it is placed on an electronic balance that reports all masses 18.00% too low due to miscalibration, what mass will the balance report for the cylinder of iron?

how many protons electrons and neutrons does a atom with the atomic number 50 and mass number 125 contain?

Changes to a substance that do not involve a permanent reordering of atoms are know as Question 1 options: endothermic changes. physical changes. chemical changes. irreversible changes.

In which of the following creates would you need a strong background in chemistry

Consider that cuo (s) + h2so4 (aq) reacts to give cuso4 (aq) and cuo (s) + k2so4does not give a product.

Why are some compounds that contain carbon not considered as organic compounds?

When ions having a positive charge form bonds with ions having a negative charge, the charge on the resulting compound is what

WHY IS THE OCEAN SALTY ALSO I CANT TAKE OF CAP LOCKS ON A CROME BOOK

Compare and contrast steak and juice