Suppose you have a cylindrical glass tube with a thin capillary opening, and you wish to determine the diameter of the capillary. You can do this experimentally by weighing a
piece of the tubing before and after filling a portion of the capillary with mercury. Using
the following information, calculate the diameter of the capillary.
Mass of tube before adding mercury = 3.263 g
Mass of tube after adding mercury = 3.416 g
Length of capillary filled with mercury = 1.675 cm
Density of mercury = 13.546 g/cm
Volume of cylindrical capillary filled with mercury = (TT)(r) (length)

answer: the enthalpy of the overall chemical reaction is +87.88 kj or +88 kj.

according to hess's law, the overall enthalpy of a reaction is the difference between the sum of enthalpy values of all the products and the sum of enthalpy values of all the reactants.

δh(reaction) = ∑nδh(products) - ∑nδh(reactants)

δh(reaction) = [δh +δh] - [δh]

δh(reaction) = [1(-287.02) + 1(0) ] - [1(-374.9)] kj = +87.88 kj

here, δh (pcl3) = -287.02 kj, δh(cl2) = 0, δh(pcl5) = -374.9 kj

therefore, enthalpy of the overall reaction is +87.88 kj or +88 kj.

plants need sunlight, water, and carbon dioxide to make food. plants use the raw materials of water, nutrients they absorb from soil, and carbon dioxide to make sugars the plant can use. energy from the sun and chlorophyll are also needed.

so she was walking and she stepped on warm jeffy , uh uh uhh dadye i just pooped my pants