How many grams of water must be added to 455 grams of potassium sulfate in order to make a 1.50 m solution?

Molar mass of K₂SO₄ = 174.3 g/mol
Mass of K₂SO₄ = 455 g

Moles = mass / molar mass

Hence, moles of K₂SO₄ = 455 g / 174.3 g/mol
                                      = 2.61 mol

Molarity = moles of solute (mol) / Volume of the solution (L)

Hence, volume = moles of solute / molarity
                         = 2.61 mol / 1.50 M
                         = 1.742 L = 1742 mL

Hence, needed volume of water = 1742 mL

Density = mass / volume

Density of water = 0.9972 g/mL

Hence mass of water = 0.9972 g/mL x 1742 mL
                                   = 1737.12 g

Hence, needed mass of water = 1737.12 g.

D)can be increased in a closed system

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later