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Questions in chemistry

[Terjawab] 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

[Terjawab] 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].

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

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

[Terjawab] Based on the Law of Conservation of Mass, what mass of products form when baking soda decomposes? NaHCO3 → Na2CO3 + H2O + CO₂ 25.00 g → ? g Give your answer to the correct number of significant figures.

[Terjawab] Which three of the following molecules have one or more lone pairs on the central atom? [tex]$H _2 O$[/tex] [tex]$CH _2 F_2$[/tex] HCN [tex]$NBr _3$[/tex] [tex]$SeO _2$[/tex] [tex]$SiH _4$[/tex]

[Terjawab] Explain which of the five types of reactions this is, and justify your answer. [tex]AlBr _3+ K _2 SO _4= KBr + Al _2( SO _4)_3[/tex]

[Terjawab] Identifying Metalloids Malik analyzed three samples to test which element was a metalloid. The table shows his results. | Element | Lustrous | Brittle | How It Reacts | Boiling Point (°C) | Melting Point (°C) | Electrical Conductivity | |---|---|---|---|---|---|---| | A | yes | no | base | not observed | 97.72 | high | | B | no | yes | acid | -34.04 | not observed | very low | | C | yes | yes | acid or base | not observed | 1413.85 | medium | Which element (A, B, or C) is most likely a metalloid?

[Terjawab] Which groups on the periodic table contain metalloids? A. Groups 1-2 B. Groups 3-12 C. Groups 13-16 D. Groups 17-18

[Terjawab] Which ionic compound ending would indicate that there are no polyatomic ions? A. -ate B. -ide C. -ite