You find a compound composed only of element "x" and hydrogen, and know that it is 91.26% element x by mass. each molecule has 2.67 times as many h atoms as x atoms. what is element x?

The element X is silicon.

Explanation:

Percentage of element X in compound molecule = 91.26%

Number of X element atom in a molecule = n

Number of hydrogen atom in a molecule = n × 2.67

Molecular formula of compound =

Let the atomic mass of element X = m

Molar mass of compound =

Percentage of an element in a compound:

m = 27.87 g/mol ≈ 28 g/mol

The element X is silicon.

adding or remove a gaseous reactant or product changes the concentrations. if the concentration of reactant or product is increased, the system will shift away from the side in which concentration was increased (i.e. if the concentration of reactants is increased, the system will shift toward the products. if more products are added, the system will shift to form more reactants). conversely, if the concentration of reactant or product is decreased, the system will shift toward the side in which concentration was decreased (i.e. if reactants are removed, the system will shift to form more reactants. if the concentration of products is decreased, the equilibrium will shift toward the products).

explanation: