Determine the empirical formula of an organic hydrocarbon compound that contains 80% by mass of carbon and 20% by mass of hydrogen. If the Mr of the compound is 30, what is the molecular formula?

Which monomer is most likely to form an addition polymer? a substituted hydrocarbon, such as chloroethane an unsaturated hydrocarbon, such as propene a compound with a carboxyl group and an amino group a saturated hydrocarbon, such as ethane?

What is the Ka of a 0.653 m solution of hydrocyanic acid with a ph of 5.47

A substance produced by some insects that was used to make records before world war II

Why using a temperature probe is preferable to using a conventional mercury thermometers

What mass of kcl is needed to precipitate the silver ions from 15.0 ml of 0.200 m agno3 solution?

Where does transcription happen? why is it only in this location?

True or false during decomposition nitrogen gas is changed into nitrogen compounds

Which of the following is a suggested practice to invite families to participate in decision-making and goal-setting for their child? A. Advocacy events B. Take-home backpacks C. Family/teacher conference D. Weekly newsletters

TRUE OR FALSE A stable mixture of two or more mixable substances is called an emulsion

A chemical engineer is developing a process for producing a new chemical. One step in the process involves allowing a solution of potassium hydroxide to react with a solid. Which action would most likely increase the reaction rate for this step?