11. Contrast the following:

• Mixture:

• Compound:

• Element:

How many moles of He are in 16g of the element

What is the mass of one mole of NA

What is the difference between a dilute solution and a concentrated solution?

What is the percentage composition of carbon in the compound CH4

A certain metal hydroxide, m (oh) 2, contains 32.8% oxygen by mass. what is the identity of the metal m? enter the full name of the element.

Calculate the coulombic force (in Newtons) felt by an electron and a proton separated by a distance of 1 angstrom. An angstrom is 10-10 meters.

Why does stirring increase the rate of dissolution? A. Stirring the solution decreases the kinetic energy of the solution. B. Stirring the solution increases the surface area of the solution. C.

How many moles of ba (oh) 2 are present in 275 ml of 0.200 m ba (oh) 2?

The molecular weight of vitamin C, CH06, is 176.12 8 mol What is the mass, in grams, of 0.000142 mol of vitamin C? Express the answer using 3 significant figures. 09

When The reaction below demonstrates which characteristic of a base? Upper C U upper S upper O subscript 4 (a q) plus 2 upper N a upper O upper H (a q) right arrow upper C u (upper O upper H) subscript 2 (s) plus upper N a subscript 2 upper S upper