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Questions in chemistry

[Answered] Which clue can be used to identify a chemical reaction as a decomposition reaction? A. The reaction involves oxygen. B. The reaction involves ions. C. The reaction has a single reactant. D. The reaction has a single product.

[Answered] At [tex]$60^{\circ} C$[/tex] 124 g of saturated solution obtained 2 g of solid [tex]$A$[/tex] 12 g of saturated solution obtained = ? [tex]\begin{array}{l} =\frac{12 g \times 2 g}{124 g} \\ =2.32 g \end{array}[/tex]

[Answered] How many moles are in [tex]$2.11 \times 10^{24}$[/tex] molecules of [tex]$BeF _2$[/tex]?

[Answered] Which reference is most appropriate for handling specific chemical agents safely? A. Red book B. Owner's Manual C. Drug Index D. Safety Data Sheet (SDS)

[Answered] Why are covalent compounds considered non-conductive and non-electrolytes? A. They have high flexibility. B. They are insulators. C. They contain ions. D. They are metals.

[Answered] Write the chemical symbol for an element belonging to each of the element families in the table below. | element family | example element | | --- | --- | | halogen | $\square$ | | chalcogen | $\square$

[Answered] Does watermelon represent: A. a heterogeneous mixture B. an element C. a homogeneous mixture D. a compound

[Answered] Assume the recommended single dose of an antihistamine for a child weighing $36-47 lbs$ is 1.50 teaspoons (tsp). If 1.00 tsp contains 12.5 mg per 5 mL of the active ingredient in the antihistamine, how many milligrams of active ingredient does the recommended dose for a child weighing 36-47 lbs contain? Assume that $1.00 tsp =5 mL$. active ingredient: $\square$ mg

[Answered] Adding up all of the _____ of all of the individual atoms within one molecule of a compound will determine the molecular mass of the compound. A. protons B. atomic numbers C. electrons D. atomic masses

[Answered] Using the thermodynamic information in the ALEKS Data tab, calculate the boiling point of ethanol (C2H5OH). Round your answer to the nearest degree.