2.1 x10^3 + 2.1 x 10^2

What types of salts are added to fireworks to give them color

How are elements that are gases at room temperature designated in the periodic table

How many L of CO2 at STP could be produced from the reaction of 2 L of CH4 at STP with 2 L of O2 at STP? CH4+2O2-2H2O+CO2 A 1L B 2L C 3L D 4L

If you were asked to convert 4.2 * 10^22 of aluminum to miles

Explain reasons why helium is used to fill balloon instead of hydrogen having a lighter weight

Does a gas discharge tube filled with boron emit the same wavelength

a certain solution has a molarity of m = 6.39 mol/l and has a volume of v = 0.550 l what is the value of n

Alcohols are polar molecules. true false

If a normal force of 500 N is acting on two surfaces in contact with a coefficient of friction equal to 0.50, what would be the maximum force of static friction?

Elements with the same number of shells are called? All the element that have the same number of valence electrons and have similar physical and che. ical properties are called?