Which of the following influences virtual community networks? 

Community exists in the spaces where people interact socially.

Which of the following is the correct formula for the compound with the name copper(II) sulfate?

Which of the following formulas for a compound containing the Fe2+ ion is incorrect?

Calculate the molar mass of Na2SO4.

For statistically significance, the results are greater than or equal to 0.05.   

A 6.25 g sample of magnetite (Fe3O4) contains 4.52 g of Fe. What are the mass percentages of iron and oxygen in magnetite?

The compound SO2 is a colorless gas with a boiling point of –10°C. Name this molecular compound.

Acetic acid is the active ingredient in vinegar. It consists of 40.00% C, 6.714% H, and 53.29% O. What is the empirical formula of acetic acid?

Which of the following compounds contains a metal ion with a charge of 2+?