What amount of solid NaOH must be added to 1.0 L of a 0.11 H2CO3 solution to produce a solution with [H+]= 3.5×10−11 M ? There is no significant volume change as the result of the addition of the solid.

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4- c, because all matter stays the same no matter what. it is still there. 5- b, because matter is known as mass. 6-c because, flammability is a chemical property. malleability is changing the shape of an object.