Which is a proper description of chemical equilibrium? (A)The frequencies of reactant and of product collisions are identical. (B)The concentrations of products and reactants are identical. (C)The velocities of product and reactant molecules are identical. (D)Reactant molecules are forming products as fast as product molecules are reacting to form reactants. (E)The numbers of moles of reactants and products are equal.
fibby Chemistry 1 0
The molar mass of an element is equal to (A) the mass of an atom of the element in grams. (B) the atomic mass of the element in grams. (C) the number of atoms in a mole of the element. (D) the number of atoms in a gram of the element. (E) the number of electrons in an atom in grams.
jarrettbryson Chemistry 1 0
Which of the following statement(s) is true? I. The mass of the reactants for a particular reaction always equals the mass of the products. II. The number of moles of product must always equal the number of moles of reactants for any reaction. III. The volumes of gaseous reactants must always equal the volumes of gaseous products for any reaction. A. I B. II C. III D. I and II E. I and III
CharlynLeckbee Chemistry 1 0