How many grams of O2 (g) are needed to completely burn 15.6 g of C3H8 (g) ?

What is the mole ratio of H2O to C8H8?

At STP, oxygen exists in two forms, O2 (g) and O3 (g). These two forms of oxygen have 1. different molecular structures and different properties 2. different molecular structures and the same properties 3.

What is the mass (in grams) of 9.09x10^24 molecules of methanol (CH3OH) ? AND How many moles of N are in 0.183g of N2O?

Which factor determines the atomic number of an atom? A) the number of protons plus the number of neutrons in every atom. B) the number of neutrons in two atoms of an element. C) the number of electrons in the outer layer of any atom.

Chemical equations need to be balanced in order to satisfy the law of a. molecular changes. b. conservation of mass. c. products and reactants.

State the general relationship between temperature of the water and the amount of the salt that will dissolve in the water

Consider a triprotic acid like phosphoric acid or citric acid. which expression correctly describes the relative magnitudes of the three ka equilibrium constants?

If 14g of ethene reacts with excess amount of steam to give 17.25g of ethanol what is the percentage yield

The electrical conductivity of an aqueous solution depends on the concentration of which particle in the solution

What changes in physical properties can be used as evidence that a chemical reaction has occured?