Please help me.

To determine the density of lead, a pair of students took some lead shot (pellets), determined their mass then poured them into a burette containing some water. They noted the reading on the burette before and after adding the pellets. Use their results below to calculate the density of lead.

Mass of lead pellets = 142.6g

Initial reading of the burette = 34.7mL

Burette reading after adding the lead shot = 22.2 mL

I am so confused I don't know how to calculate the density. Please explain how.

Two liquids are shaken together in a test tube to produce a mixture that quickly separates into two layers. which of the following best describes the behavior of the above pair of substances? soluble insoluble miscible immiscible

What is the chemical formula of the following compound

24 points and brainliest to anyone who can answer under 10 minutes with best ! the table below shows the role of different substances during photosynthesis. substance role during photosynthesis glucose stores chemical energy water combines with glucose to form carbon dioxide chlorophyll traps sunlight which of the following statements would correct one of the roles listed in the table? glucose combines with carbon to form water. chlorophyll reacts with light to produce carbon dioxide. water combines with carbon dioxide during photosynthesis. chlorophyll stores chemical energy needed for photosynthesis.