Which statement correctly compares how measured and defined values are treated in calculations? A. Measurements do not affect the number of significant figures in a calculation while defined values do affect this number
B. Measurements and defined values affect the number of significant figures in a calculated number
C. Neither measurements nor defined values affect significant figures. Only non-zero digits matter
D. Measurement values affect the number of significant figures in a calculation while definitions do not affect this number
(Can I also get a small explanation as to why it is the answer, please? Thanks)

Which is a difference between molecular compounds and ionic compounds? select the correct answer below: question 5 options: molecular compounds typically form between a metal and a nonmetal, while ionic compounds typically form between nonmetals. molecular compounds result from the transfer of electrons between atoms to form ions, while ionic compounds result from the sharing of electrons between neutral atoms. molecular compounds are formed of discrete, neutral molecules, while ionic compounds are formed of large repeating arrays of opposite charges. molecular compounds have high melting points and high boiling points, while ionic

The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms

Which of the following is the correct definition of chemical energy? a. energy an object has because of its motion or position b. energy resulting from the flow of charged particles, such as electrons or ions c. energy produced from the splitting of atoms d. energy stored in chemical bonds of molecules