2 (NH4) 2Cr2O7 how many atoms

What makes a pure substance different from a heterogeneous mixture? A.) The components of a pure substance are mixed unevenly instead of evenly within the pure substance. B.

What is the smallest particle present in water?

1. How many moles are in 80.5g of Aluminum Sulfide?

How many Lewis dots does the cation [Ne 3+], (Neon with a + 3 charge) have? A 5 B 6 C 7 D 8

Some chemical reactions can proceed in just one direction. True or False?

Only a small portion of the organisms that lived in the geologic past have been preserved as fossils. Which condition best increases the chance that an organism will become fossilized?

Which one of the following electron transitions does not correspond to an absorbtion of a quanta of light? 1. n = 4 to n = 6 2. n = 7 to n = 5 3. n = 2 to n = 5 4. n = 2 to n = 6 5. None of the Above

Which atom has a change in oxidation number of - 3 in the following redox reaction K2Cr2O7 + H2O + S - - > KOH + Cr2O3 + SO2

Why does fluorine have a higher electronegativity than lithium?

What mineral is this? Irregularly shaped, white with nonmetallic luster, the hardness of 2.5, shows cubic cleavage and dissolves easily in water.