Properties of a substance which can be measured or observed without altering the identity of the substance being measured are

the answer is chemical properites

Correct. chemical properties are the characteristic than an element or a compound that depends on one the particles that make it and not the structure or shape. in other words, these properties do not depend on the shape but what they compound is made of. 

some examples of chemical properties are toxicity and flammability

How does the equilibrium change with the removal of hydrogen (H2) gas from this equation? 2H2S ⇌ 2H2(g) + S2(g) A. ... Equilibrium shifts left to produce less reactant.

Explanation:

option A is the correct answer

Equilibrium shifts right to produce more product.

I hope it will help you.