Which contributes more to an atom's mass: electrons or protons? which contributes more to an atom's size? 1. protons; protons 2. electrons; electrons 3. electrons; protons 4. protons; electrons?

Why does a plastic bottle that is sealed at a high altitude change its shape when it is taken to a low altitude?

Calculate the cost of gasoline for a 420-mile trip if your car averages 20 miles/gallon of gas, and the gas cost $0.95/gallon.

In the construction of bridges and sky scrapers, gaps must be left between adjoining steel beams to allow for expansion and construction of the metal due to heating and cooling. The temperature of a sample of iron with a mass of 20.

Calculate the number of moles in 118.2 grams of copper

Which type of chemical reaction does this word equation exemplify: calcium oxide combines with silicon dioxide to form a single product, calcium silicate?

31.65 mL volume of 1.07 M Fe (NO3) 3 is mixed with 44.96 mL of 0.79M Fe (NO3) 3 solution. Calculate the molar concentration of the final solution. Save rounding until the end.

At standard pressure, during which physical change does the potential energy decrease?

How are inner and outer planets different?

What process do body cells use to divide

Recall the postulates of kinetic molecular theory read the list and check all the statements that apply to behavior of an ideal gas