The solvent acetone was poured into a glass container, and the combined mass of the container plus acetone was found to be 409.7 g. the mass of the empty container was 260.16 g, and the volume of acetone was 189 cm3. (to keep track of significant figures during each calculation, underline the last significant figure in each number in the calculation.)

(a) find the mass of acetone in the container by subtracting 260.16 g from 409.7 g, and report the result with the appropriate number of significant figures.

(b) calculate the density of acetone by dividing the mass obtained from part (a) by the volume 189 cm3, and report the result with the appropriate number of significant figures.

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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