Forty-nine milliliters of an acid with an unknown concentration are titrated with a base that has a concentration of 3.0 M.
The indicator changed color when 28 milliliters of base were added. What is the concentration of the unknown acid?
1.7M
5.3 M

According to the diagram, what sources contribute to the phosphorus found in soil? according to the diagram, phosphorus found in soil contributes phosphorus to what other sources?

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.

What element has similar physical and chemical properties as boron.