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A student collected the following data on three unknown mixtures. Explain whether sample 2 is a solution, suspension or colloid Give 2 reasons for your choice.

Which of these reactions are redox reactions? check all that apply.cd + hcl → cdcl2  + h2cucl2  + na2s → 2nacl + cuscaco3  → cao + co2          2zns + 3o2  → 2zno + 2so2          ch4  + 2o2  → co2  + 2h2o

Draw two cyclic constitutional isomers of cis-1

Is a pencil falling to the floor anon contact force, a force, or a contact force