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The oxidation number of aluminum in Al³⁺ is:

How many molecules are in 25.8 moles of CO₂? Enter answer as X.XXEXX for scientific notation.

In the reaction between HNO₃ and Ba(OH)₂ (assume complete reaction of the Ba(OH)₂), the spectator ions are:

If 365 mL of 0.285 M MgCl₂ is added to 235 mL of 0.215 M (NH₄)₃PO₄, how many moles of Mg₃(PO₄)₂ precipitate will be formed? The balanced equation is:  

What is the oxidation number of S in the compound Na₂S₂O₅?

Determine the molar mass of C₆H₁₂O₆. Provide an answer to two decimal places.

65.0 mL of 0.250 M LiCl is added to a 1.000 L volumetric flask and the flask is filled with water. Calculate the [Li⁺] concentration in the diluted solution.

What quantity in moles of CH₃OH are there in 150.0 mL of 0.210 M CH₃OH?

Consider the following sets: U={10,11,12,13,14,15,16,17,18,19} P={10,12,14,15,17} Q={11,13,15,16,18} R={10,12,16,17,19} Provide in set roster notation {}, the elements of the following sets:a) R’ ∩ Q’b) Q’ U P ∩ Rc) Draw Venn diagram for part-b

Given the rooted tree below: a) Identify the root, leaves, and height of the tree. b) Find the level of vertex ‘d’ c) Find the level of vertex ‘k’ d) Draw the subtree rooted at ‘i’ e) Identify parents, children, ancestors, and siblings of the following vertices f and m: