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Questions in chemistry

[Done] What should you do if you cannot find the Safety Data Sheet (SDS) for the chemical you are going to work with? A. Read the label on the container and proceed with the work B. Ask your supervisor for and read the SDS before proceeding with the work C. Ask a new employee, who has recently been trained, about the hazardous chemical D. Contact the Centers for Disease Control for a new SDS

[Done] 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]Pb ^{2+}[/tex] | [tex]C _2 H _3 O _2^{-}[/tex] | | | | [tex]Ca ^{2+}[/tex] | [tex]NO _3^{-}[/tex] | | | | [tex]K ^{+}[/tex] | [tex]CH _3 CO _2^{-}[/tex] | | |

[Done] Which of these changes is an example of a physical change? A. lighting a candle B. bleaching a shirt C. burning oil

[Done] Name the empirical formula and name of each ionic compound that could be formed from the ions in this table: | cation | anion | empirical formula | name of compound | |---|---|---|---| | [tex]$Ba ^{2+}$[/tex] | [tex]$P ^{3-}$[/tex] | | | | [tex]$Ba ^{2+}$[/tex] | [tex]$N ^{3-}$[/tex] | | | | [tex]$Ba ^{2+}$[/tex] | [tex]$S ^{2-}$[/tex] | | | | [tex]$Ba ^{2+}$[/tex] | [tex]$O ^{2-}$[/tex] | | |

[Done] What can cause a compressed gas cylinder to explode? A. A mislabeled cylinder B. Excessive pressure within the cylinder C. Abuse or misuse of the cylinder D. B and C are correct

[Done] In your understanding, what is destructive distillation of coal?

[Done] What is the meaning of the heat of combustion of ethanol?

[Done] What happens to magnesium when it is oxidized to magnesium oxide (MgO)? A. It gains oxygen. B. It loses two protons. C. Its oxidation state decreases. D. Its oxidation state remains the same.

[Done] Which organ systems benefit from the functions of the digestive system?

[Done] What are the reactants in this chemical reaction? Ammonium nitrate reacts with sodium hydroxide to form gaseous ammonia, water, and sodium nitrate. A. $NH_3+H_2 O+NaNO_3$ B. $NH _4 NO _3+ NaNO _3$ C. $NH_4 NO_3+NaOH$ D. $NaOH+NH_3$