Question

Compared to a 26-gram sample of NaCl(s) at STP, a 52-gram sample of NaCl(s) at STP has(1) a different density(2) a different gram-formula mass(3) the same chemical properties(4) the same volume

Answer 1

A 52-gram sample of NaCl has the same chemical properties as a 26-gram sample, including the same density and gram-formula mass, since these are intrinsic properties of the substance.

Step-by-step explanation:

When comparing a 26-gram sample of NaCl(s) at STP to a 52-gram sample of NaCl(s) at STP, we find that the latter simply contains more moles of NaCl because the gram-formula mass of NaCl is constant regardless of the amount of substance. Therefore, a 52-gram sample has (3) the same chemical properties as a 26-gram sample because these properties are intrinsic to the substance and do not depend on the amount of the substance present. Both samples have the same density, given that density is an intensive property and does not change with the sample size. The gram-formula mass remains constant at 58.4 g/mol, and the density is 2.16 g/cm³, which is not affected by the quantity of the sample.

Answer 2

The answer is (3) the same chemical properties. The two samples are under same condition so they have same density. The gram-formula mass is the property of the matter itself. So it will not change. The volume will change when mass changes.