An ion from a given element has 82 protons and 80 electrons. what is the charge on the ion? what is the name of the element? what is the symbol for the ion?

Based on the following chemical equation: 2C6H6 + 15O212CO2 + 6H2O, calculate the number of moles of CO2 that will be formed when 8. 90 mol of H2O are produced?

Within the main group elements, a family on the periodic table has the same number of electrons on in the valence level. TRue or false

Calculate the molar solubility of PbCO3 when the Ksp of PbCO3 is 1.5*10^-15 at 25°C.

What is the composition of magma

Analysis of a compound of sulfur, oxygen and fluorine showed that it is 31.42% S and 31.35% O, with F accounting for the remainder. In a separate experiment, the molar mass of the compound was found to be 102.1 g/mol.

Write the element symbol for the element with the abbreviated electron configuration [ne]3s23p2.

2. Describe in a step by step manner how you determined the identity of the two unknowns. Discuss both what you determined the unknowns to be and the method that you used to find them.

Number of hydrogen atoms in NaC2HO4

Calculate the pH for an acid that has a [H+] of 5.8 x10^-11 M.

Complete the lewis dot structure for h2co (in which both h atoms are bonded to c).