Question

to find the density, matt must determine the rocks mass and volume. how should he determine the rocks volume? a. he should see whether a magnet will stick to its surface. b. he should melt it in a furnace and analyze the minerals. c. he should weigh it on an electronic balance d. he should measure water displacement using a graduated cylinder. question 2. if the rock has a mass of 1098 grams and a volume of 122 cm³, its density is ________ a. 133,956 g/cm³ b. 976 g/cm³

Explanation:

Step1: Recall density formula

Density $
ho=\frac{m}{V}$, where $m$ is mass and $V$ is volume.

Step2: Analyze volume - measurement methods

To find the volume of an irregular - shaped rock, the water - displacement method using a graduated cylinder is appropriate. Weighing on an electronic balance gives mass (not volume), melting and analyzing minerals is for chemical composition, and checking magnetism has nothing to do with volume.

Step3: Calculate density for second question

Given $m = 1098$ g and $V=122$ cm³, $
ho=\frac{m}{V}=\frac{1098}{122}=9$ g/cm³. But let's analyze the multiple - choice options based on the formula application.

Answer:

Question 1: D. He should measure water displacement using a graduated cylinder.
Question 2: None of the given options are correct. The correct density is 9 $\frac{g}{cm^{3}}$ calculated as $\frac{1098}{122}$.