Answer: A ratio scale of measurement.
Explanation: Ratio scale can be defined as the measurement that is based on the quantity of the object .It consist of the intervals for determining the measurements with the characteristic of zero point.
As the situation mentioned in the question about Todd conducting the research on the basis of asking about number of friends from the students displays that he is measuring the quantity and thus using the ratio scale of measurement.If someone has no friends then zero pint will be indicated.
Other options are incorrect because qualitative variable is based on quality , categorical variable refers to category and other-report-measure is the indirect method for measurement.
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Benzene behaves differently from a hydrocarbon which simply contains three c c bonds in that the latter would be expected to react much more readily with H2, Cl2, Br2, HCl
The chemical compound benzene has the molecular formula C6H6 and is an organic chemical. Six carbon atoms are connected in a planar ring to form the benzene molecule, and one hydrogen atom is attached to each one. Benzene is categorised as a hydrocarbon because it solely has carbon and hydrogen atoms.
One of the fundamental petrochemicals, benzoene is a component of crude oil that occurs naturally. Benzene is categorised as an aromatic hydrocarbon because of the cyclic continuous pi bonds that exist between the carbon atoms. PhH is a common abbreviation.
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