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Classify these substances. More than one answer may apply in each case. N_2 element compound pure substance homogeneous mixture heterogeneous mixture solution O_2 element compound pure substance homogeneous mixture heterogeneous mixture solution N_2O element compound pure substance homogeneous mixture heterogeneous mixture solution Air (mostly N_2 and O_2) element compound pure substance homogeneous mixture heterogeneous mixture solution

Answer 1

An element is defined as the substance which cannot be broken down into smaller pieces A compound is defined as the chemical combination of two or more elements. The elements are present in a fixed ratio in a compound Pure substance is defined as the substance which is made up of only one type of element or compound Homogeneous mixture is defined as a mixture in which the components are present in the same proportion throughout the sample. Heterogeneous mixture is defined as a mixture in which the components are not present in the same proportion throughout the sample Solution is defined as the homogeneous mixture of two or more substances So, according to the above definitions, the given substances are classified as follows: N2 Pure substance, Element O,:Pure substance, Element N20: Compound, Pure substance, Homogeneous Mixture Air: Homogeneous mixture, Solution