Which of the following pairs does not share the same empirical formula?

1) CH2O and C3H6O3

2) PbCl2 and PbCl4

3) NO2 and N2O4

4) C3H12 and CH4

Is sponge cake a heterogeneous mixture

Multiple Choice: After a metal object turns to dust (rust), it would have high entropy low entropy no entropy Question #9

Describe the structure of typical atom identify where each subatomic particles is located

An automobile engine has a piston displacement of 1,600 cm3. Express this volume in cubic inches. (1 in = 2.54 cm)

What is the reaction between copper solid and concentrated nitric acid

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.