You create a mixture of water and acetic acid that possesses a mole fraction of acetic acid of 0.2 to perform the recrystallization, but are worried that you may cause the mixture to freeze in the process. At what approximate temperature does this liquid mixture begin to freeze

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.

gasoline is a mixture. it contains several different kinds of compounds that can be present in a variety of ratios.

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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