There are two main ways that minerals are classified. which identifies those two main ways?

a. country of origin and chemical makeup

b. chemical makeup and use

c. crystal structure and economic value

d. use and economic value

Chlorophyll a had the molecular formula c55h72mgn4o5 how many atoms are in this molecule

The lattice enthalpy (formation of ionic solid from ions in the gas phase) for agcl(s) is -916 kj/mol and the hydration enthalpy (dissolution of gaseous ions into water) is -850 kj/mol. how much heat (in joules) is involved in forming 1l of saturated agcl solution (1.8 × 10-4 g / 100 ml water) by dissolving agcl(s)? assume solution volume does not change much upon dissolution. the equations are given below. ag+(g) + cl−(g) æ agcl(s)

Abaker touches a pie right after taking it out of the oven. which statement best explains why the pie feels hot?