Good morning,

I would like to ask some questions.
1. Is KNO subscript 3 named potassium nitrate

2. Is NaOH named sodium Hydroxide

3. Cu(No subscript 3) subscript 2 named Copper(II) nitrate

4. PCl subscript 3 named phosphate trichloride

5. Can you help me create chemical formulas

4. Phosphrous(3) chloride
or acceptable, phosphoros trichloride.

http://fsc.fernbank.edu/chemistry/nomen.html

click on the link at the bottom for practice.

What about the rest of them are they correct

I think you didn't type all of #3. I assume you intended to write Cu(NO3)2

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