What is the name of the compound N2O5?

Write the correct formula for the following compounds.A) Hydrosulfuric acid: ___B) Cadmium phosphide: ___C) Decasilicon octafluoride: ___D) Nickel (II) carbonate: ___E) Nitrous acid: ___ NOTE: Chemical formulas typed without proper formatting (“H2O”) will be marked incorrect.NOTE: To insert a subscript use the down “

Write the formula (and charge) for each ion.A) Acetate: ___B) Zinc ion: ___C) Nitride: ___ NOTE: Chemical formulas typed without proper formatting (“H2O”) will be marked incorrect.NOTE: To insert a subscript use the down “

What is the atomic number of potassium?[response_blankA]

Explain what the numbers placed in front of formulas (coefficients) represent in a balanced equation.

Based on its group number, write the charge an ion would have for an element in each group.A) Group 1: [response_blankA]B) Group 16: [response_blankB]

Convert 6.380 g to dg.

Perform the following calculation.(52.418 − 7.6) ÷ 128.34

On my honor, I have neither given nor received unauthorized aid in doing this assignment.  

This question is Extra Credit, it is optional to answer. It is worth 1 point.What is the name of the periodic group that selenium is in?