Which of the following are examples of physical change?

carbon dioxide sublimating

cooking a hamburger

water evaporating

a match burning

What is the importance of color in the periodic table? A. to identify families, elements with similar properties. B. to show which elements have greater atomic mass. C. to indicate identical elements. D. to separate acids and bases.

The grid in a triode is kept negatively charged to prevent

A certain liquid has a density of 1.50 g ml. 2.00ml of this liquid would have a mass of

Which energy source is a nonrenewable resource?

6) How many moles would be in 25 grams of NaCl?

4. What electrons are involved in chemical bonding?

Which object forms when a supergiant runs out of fuel? a red giant a black hole a white dwarf a neutron star

What is the formula for lithium iodide

Which statement would be the most useful for deriving the ideal gas law? Volume is directly proportional to the number of moles. Volume is inversely proportional to the temperature. Pressure is directly proportional to the volume.

What monomers are used to construct this polymer and where are they found?