In hazardous materials practice, higher concentrations of air or water are usually expressed as a percentage. Suppose you have 5 liters of a certain water-soluble liquid waste to dispose of. The disposal company can take the waste only if it is diluted with water to 25% by volume. Calculate how much water you need to make a 25% solution

the term hydride is commonly named after binary compounds that hydrogen forms with other elements of the periodic table. hydride compounds in general form with almost any element, except a few noble gases. the trends and properties vary according to the type of intermolecular force that bonds the elements together, the temperature, its molecular masses, and other components. hydrides are classified into three major groups, depending on what elements the hydrogen bonds to. the three major groups are covalent, ionic, and metallic hydrides. formally, hydride is known as the negative ion of a hydrogen, h-, also called a hydride ion. because of this negative charge, hydrides have reducing, or basic properties. its special characteristics will be further discussed.

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