Which of the following is a physical change?

explosion

rotting of food

evaporation

rusting of iron

Why is iodine placed just after tellurium on the periodic table even though its atomic mass is less than the atomic mass of tellurium?

What is the force of gravity between jupiter and the sun change is Jupiter were closer to the sun?

If 20. g of a radioactive isotope are present at 1:00 pm and 5.0g remain at 2:00 pm, what is the half life of the isotope?

Which of the following is an example of chemical change? A.) stirring butter and sugar together B.) adding food coloring to water C.) burning a candle D.) breaking a rock into smaller pieces

Which of these is a major source of organic compounds? petroleum coal natural gas all of these

As the average kinetic energy of the particles in a gas increases, which of the following occurs? The temperature of the gas increases. The temperature of the gas decreases. The number of particles increases. The number of particles decreases.

What is the type of strong chemical bond between carbon, hydrogen, and oxygen atoms in a single organic molecule?

0.100 mol of CaCO3 and 0.100 mol CaO are placed in an 10.0 L evacuated container and heated to 385 K. When equilibrium is reached the pressure of CO2 is 0.220 atm. 0.

What is true about the charges of transition metal ions?

A gas obeys the ideal-gas equation of state P V = N k T, where N = n NA is the number of molecules in the volume V at pressure P and temperature T and n is the number of gm-moles of the gas.