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Questions in chemistry

[Homework Help] Using the "NAS" idea, how many electrons are "available" for the compound HOCl? $N=18$ 24 14 32 18

[Homework Help] For each row in the table below, decide whether the pair of elements will form a molecular compound held together by covalent chemical bonds. If the elements will form a molecular compound, check the box and enter the chemical formula and name of the compound. (If the elements will form more than one molecular compound, use the compound with the fewest total number of atoms.) You may assume all chemical bonds are single bonds, not double or triple bonds. | element #1 | element #2 | element pair will form a molecular compound | molecular compound | |---|---|---|---| | | | | chemical formula | name | | magnesium | nitrogen | | | | nitrogen | fluorine | | | | hydrogen | bromine | | |

[Homework Help] The electronic configuration of three elements $X$, $Y$, and $Z$ are $X - 2,8,7$; $Y - 2, 8, 2$; and $Z = 2,8$. Which of the following statements is correct? A. $Y$ and $Z$ are metals B. $Y$ and $X$ are non-metals C. $X$ is a non-metal and $Y$ is a metal D. $Y$ is a non-metal and $Z$ is a metal

[Homework Help] 1. Describe pH Scale: Write what is meant by the term 'pH' and what are the variations on the scale. Use examples, if possible. 2. List uses of pH Scale: Provide two or more uses of the pH scale.

[Homework Help] Select the best answer for the question. 20. On the pH scale, which value is considered neutral? A. 5 B. 7 C. 2 D. 11

[Homework Help] A chemist fills a reaction vessel with 0.536 g aluminum hydroxide $[Al(OH)_3]$ solid, 0.337 M aluminum $[Al^{3+}]$ aqueous solution, and 0.196 M hydroxic $[OH^-]$ aqueous solution at a temperature of $25.0^{\circ} C$. Under these conditions, calculate the reaction free energy $\Delta G$ for the following chemical reaction: $Al(OH)_3(s) \rightleftharpoons Al^{3+}(aq)+3 OH^{-}(aq)$ Use the thermodynamic information in the ALEKS Data tab. Round your answer to the nearest kilojoule.

[Homework Help] The name for $Mg_3(PO_4)_2$ is [a] [b]. [a] magnesium [a] manganese [a] magnesium(II) [a] manganese(II) [a] dimagnesium [a] dimanganese [b] phosphate [b] phosphite [b] diphosphate [b] phosphide

[Homework Help] A pharmacy technician needs to convert 10 ounces of a medication to grams for accurate dosing. How many grams is this? Use the conversion factor [tex]$1 oz =28.35 g$[/tex].

[Homework Help] How many protons are in manganese-55? ${}_{25}^{55} Mn$ A. 30 B. 55 C. 25

[Homework Help] What is the formula of magnesium hydrogen carbonate? A. $MgClO _3$ B. $Mn ( HCO _3)_2$ C. $MgCO _3$ D. $Mg ( HCO _3)_2$