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Questions in chemistry

[Homework Help] Fill in the name and empirical formula of each ionic compound that could be formed from the ions: | cation | anion | empirical formula | name of compound | |---|---|---|---| | [tex]Fe ^{3+}[/tex] | [tex]NO _2^{-}[/tex] | | | | [tex]K ^{+}[/tex] | [tex]SO _4^{2-}[/tex] | | | | [tex]Fe ^{2+}[/tex] | [tex]CH _3 CO _2^{-}[/tex] | | |

[Homework Help] How do you prepare a 1 molar ferric chloride solution?

[Homework Help] Listen Oxides of nitrogen (NOx) contribute to the formation of A) photochemical smog. B) particulate emissions. C) acid rain. D) high levels of CO2.

[Homework Help] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Homework Help] How many protons are in this element? [tex] { }_{14}^{20} Si [/tex]

[Homework Help] Fill in the name and empirical formula of each ionic compound that could be formed from the ions in this table: | cation | anion | empirical formula | name of compound | |---|---|---|---| | [tex]K^{+}[/tex] | [tex]BrO_4^{-}[/tex] | [tex]\square[/tex] | [tex]\square[/tex] | | [tex]Na^{+}[/tex] | [tex]NO_2^{-}[/tex] | [tex]\square[/tex] | [tex]\square[/tex] | | [tex]K^{+}[/tex] | [tex]BrO^{-}[/tex] | | [tex]\square[/tex] |

[Homework Help] What is important for you to do when working with a compressed gas cylinder? A. Use heat to raise the gas pressure B. Refill the cylinder when it is empty C. Make sure the cylinder and the work area are properly marked D. Use a single hose with more than one gas passage

[Homework Help] Listen Oxides of nitrogen result from a combination of nitrogen and A) oxygen. B) hydrogen. C) carbon. D) argon.

[Homework Help] What is the formula for sulfuric acid? A. $HSO _4$ B. $H _2 SO _4$ C. $SO _2$ D. $H _2 SO _3$

[Homework Help] What type of salts are alums? Why is tetraoxosulphate (VI) acid able to produce two (2) types of salts?