Which process represents a chemical change

What is the net charge (overall or sum of charges) of the nucleus and what number is it equal to?

What factors will be important win deciding the future use of energy resources

What is the density (in g/L) of a gas with a molar mass of 70.49 g/mol at 0.874 atm and 389 K?

What is the pH of an aqueous solution with the hydronium ion concentration : [H3O+] = 6.3 x 10-6 M?

Wind happens when Question 9 options: hot and cool air rise hot and cool air sink hot air rises and cool air sinks cool air rises and hot air sinks

Boron has an average mass of 10.81. One isotope of boron has a mass of 10.012938 and a relative abundance of 19.80 percent. The other isotope has a relative abundance of 80.20 percent. What is the mass of the two isotopes?

What type of radiation is most likely to damage DNA? A. ionizing B. non-ionizing

Water vapor cools and comes together to form a cloud. This is an example of what change in state? condensation evaporation melting

Which group of the periodic table does this element most likely belong to

What is the ph of a 7.5*10^-3 m H + solution