5. 54 J of heat is required to raise the temperature of a 2.47g unknown substance from 17.10C to 46.70C. a) Calculate the specific heat of the substance b) What is the substance?

Who discovered that a dense positively charged atomic nucleus is at the core of every atom

Which part of the hydrocarbon name tells you the amount of carbon in the molecule? a) prefix b) the ending numbers c) ending d) the leading numbers

Which of these elements has four total electrons in its outer porbitals?

Which is an example of a chemical reaction

Who created the periodic table and in what year?

Solution that contains high percentage of the base in solution are called?

Which statement about scientific explanations is true? A. Scientific explanations are open to change. B. Scientific explanations are never reliable. C. Scientific explanations are always correct. D. Scientific explanations are rarely proven wrong.

Which of the following might a chemist choose to study? A. Glacier movement in Alaska B. Better ways to recycle plastics C. The effects of hurricanes on turtle populations D. The vibrations in bridges caused by big trucks

How many electrons would the element calcium need to be electrically neutral?

How to convert metric units?