Acertain metal hydroxide, m(oh)2, contains 32.8% oxygen by mass. what is the identity of the metal m? enter the full name of the element.

Let the atomic mass of M metal be X.

The formula mass of metal hydroxide, =

Mass percentage of oxygen in metal hydroxide, = 32.8%

Mass percentage is given as:

Substituting the values:

%

The element having atomic mass is copper, .

Hence, In metal hydroxide, the metal M is copper, . Formula of oxide is .

The metal in the metal hydroxide is Copper, Cu.

Mass percent is the ratio of an element's mass to the mass of the compound. It is mathematically expressed as:

In the problem, the mass percent of oxygen is given as 32.8%. This can be used to determine the mass of the compound:

Now that the mass of the compound is known, the mass percent of hydrogen and of the metal, and the mass of the metal may be determined:

From the mass of the metal, its identity may be known.

Using the periodic table, search for the metal that forms a +2 cation and has a mass of 63.56 u.

The metal that fits the criteria is Copper.

Keywords: mass percent

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