A block of lead has dimensions of 4.50 cm by 5.20 cm by 6.00 cm. The block has a mass of 1587 g. From this information, calculate the density of lead.

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

Some animals that try to adapt to climate changes eventually die due to starvation, as climate change alters the web.

Which of the following is the correct definition of chemical energy? a. energy an object has because of its motion or position b. energy resulting from the flow of charged particles, such as electrons or ions c. energy produced from the splitting of atoms d. energy stored in chemical bonds of molecules