What mass of potassium would react with excess chlorine to produce 156 grams of potassium chloride

The mass of Potassium required has been 81.79 g.

The chemical equation for the formation of Potassium chloride has been:

From the balanced chemical equation, for the formation of 2 moles of potassium chloride, 2 moles of potassium has been required.

Thus, for 1 mole Potassium chloride, 1 mole of potassium has been required.

The mass of 1 mole of compound has been equivalent to the molar mass of the compound.

The molar mass of potassium has been 39.09 grams, and the molar mass of potassium chloride has been 74.55 grams.

Thus, the amount of potassium required has been given as:

Thus, the mass of Potassium required has been 81.79 g.

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since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

answer: semi-infinite solid initially at a uniform temperature of 400 ◦c is cooled at its surface by convection. the cooling fluid at a constant temperature of 200 ◦c has a convective coefficient (ha) of 250 w/m2.k. the physical properties of the solid: k = 20 w/m.k and α = 4 * 10-5  m2/s. using δx = 0.04 m and δt = 10 s. write the finite difference equations describing the transient heat transfer of the first five δx and the temperature profile after 30 s.