How does a clamp and stand reduce risk in laboratory

Aside from human impact, which of the following causes less water vapor production over a small area? (2 pderivartin

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.

Arrange the elements in order of increasing electronegativity. use the periodic table to you arrange the elements. p o k mg