6. What mass of lithium chloride is added to 200 ml of distilled water to cause the temperature of the water to increase by 60C? The molar enthalpy of lithium chloride is -37.5 kJ/mol. Assume the density of water is 1 g/ml and the heat capacity of water is 4.184 J/(g•°C). [4 marks]

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sulfur belongs to group 16 because it can be found in nature whether it is in a free or combined state.

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answer carbon and three oxygen atoms;

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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