2. Indicate the number of molecules in: a. 0.5 moles NH3
b. 1 mole of KOH

3. Indicate how many moles of compounds are in:

a. 1 g of HCl
b. 1g H2
c. 1 g CH4

4. One container contains 150 g of ethyl alcohol, C2H6O.
a. Calculate the number of moles of C2H6O
b. The number of C2H6O molecules

5. What is the centesimal composition by mass of Cu (NO3) 2?

6. A compound has the following centesimal composition by mass: Na: 43.4%, C: 11.3%, O: 45.3%. Find your formula

Data: Atomic masses: Ag = 108; N = 14; Al = 27; P = 31; O = 16; H = 1; K = 39; Cl = 35.5; C = 12;

What neutral atom is isoelectronic to mn+4

Why do you suppose the structural polysaccharide cellulose does not contain branches? why do you suppose the structural polysaccharide cellulose does not contain branches? branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into globules, thereby decreasing the flexibility and strength of the globules. branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into microfibrils, thereby increasing the rigidity and strength of the microfibrils. branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into globules, thereby increasing the flexibility and strength of the globules. branches in the molecule would generate side chains that would almost certainly make it difficult to pack the cellulose molecules into microfibrils, thereby decreasing the rigidity and strength of the microfibrils.

Water is important for the of cells. a: size, shape, and temperature b: temperature, color, and odor c: color, odor, and size d: shape, temperature, and color