Which is always the first step in dealing with an accident in the lab?

call the emergency number, 911.
call the fire department.
notify the teacher.
read the msds information.

What is the mass defect of a mole of nuclei with 1.8 x 10^15 j/mol binding energy?

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.