To save time, you can approximate the initial mass of the solid to the nearest ±1 g. for example, if you are asked to add 14.3 g of copper, add between 13 g and 15 g. which of the following sets include two samples with an equal density? which all that apply below 15.4 g gold and 18.7 g silver 15.2 g copper and 50.0 g copper 20.2 g silver and 20.2 g copper 11.2 g gold and 14.9 g gold

Set with equal densities are:

15.2 g copper and 50.0 g copper ; 11.2 g gold and 14.9 g gold

Explanation:

Density is defined as mass of the substance present in unit volume of the substance.

It is an intensive property which means that two different masses of same substance will have same value of density under same conditions.

So, from the given samples with equal density are:

The correct answer is 15.2 g copper and 50.0 g copper and 11.2 g gold and 14.9 g gold.

Explanation:

Density of an object is defined as the ratio of its mass and volume. The chemical equation representing density of an object is:  

Density is considered as an intensive property. Intensive property is the property that does not depend on the amount of substance. It remains same.

The density of a particular substance remains the same.

For Example: Density of nickel will remain the same for 100 grams or 0.01 grams of nickel sample which is 8.908 g/mL

Hence, the correct answer is 15.2 g copper and 50.0 g copper and 11.2 g gold and 14.9 g gold.

the electrical  conductivity  of asolution  of an electrolyte is measured by determining the resistance of thesolution  between two flat or cylindrical electrodes separated by a fixed distance.