What is the empirical formula for a compound if a sample contains 3.72 g of P and 21.28 g of Cl?

Which BEST describes the difference between speed and velocity?

How does heat, without causing melting, damage a rock below eath's surface

Calculate the atomic mass of chromium it's composition is 83.79% with a mass of 51.94 amu; 9.50% with a mass of 52.94 Amu; 4.35% with a mass of 49.95 amu; 2.36% with a mass of 53.94 amu

3 - Which process use to convert heavier hydrocarbons into lighter (gasoline) in the absence of oxygen and in the presence of catalyst? A - Fractional distillation B - Melting C - Cracking D - Boiling

A 452.3-g sample of an element at 192°C is dropped into an ice-water mixture; 110.6 g of ice melts and an ice-water mixture remains. Calculate the specific heat of the element. ΔHfusion = 6.02 kJ/mol (for liquid water at 0°C).

A sample of hydrogen gas has a pressure of 1.50 atm with a volume of 5.00 L, what is the pressure if the volume is expanded to 7.74 L

Which substance is an Arrhenius acid

Which is another name for groups of elements

The result of one experiment carried out by a research team would be considered valid if

Is burning a physical or chemical property?