Which of these is an example of a chemical change

f. methane is burned in air.

g. solid gold is melted to make jewelry.

h. a bar of copper is stretched into a long copper wire.

j. iron is coated with bronze to prevent rusting.

What is the total number of atoms in 80 grams of neon?

Calculate the TOTAL heat absorbed (in kJ) when 69.4 g of water is heated from 23.7°C to 126°C

An enzyme with molecular weight of 310 kDa undergoes a change in shape when the substrate binds. This change can be characterized by ultracentrifugation. In the absence of any ligand, the s20, w = 11.7S, density of solvent is 1g/cm3and viscosity 1.

A car with a 14 gallon gas tank gets 22 miles per gallon. How far can the car travel on a full tank of gas?

Sodium ions are present in relatively small concentrations compared to other extracellular cations true or false

An alkali metal is most likely to form an ionic bond with an element from which group? noble gases halogens alkaline earth metals transition metals

What is CO2 nomenclature

Salt form by hno3 + ba (oh) 2

Which of the following choices will an atom of nitrogen (N) be most likely to bond with? A. 2 calcium (Ca) atoms B. 1 hydrogen (H) atom C. 3 lithium (Li) atoms D. 2 carbon (C) atoms

Explain why the lattice energy and the energy of crystallization of a substance differ in sign but are equal in magnitude.