H2 + N2 - - - > NH3

For this unbalanced chemical equation, what is the coefficient for hydrogen when the equation is balanced?

A. 1

B. 2

C. 3

D. 4

A sealed container contains 0.10 moles of nitrogen gas and 0.20 moles of oxygen gas. If Temperature of the mixture is constant, which of the followimg is true a Molecular Masses of 2 gases are the same.

How many particles would be found in a 89.2 g sample of Na?

Mixture A was made by mixing different components together, but it appears to have one phase. Which term best categorizes mixture A?

If it take 20 second for 200cm3 of H25 to diffuse through a porovs pot, hours, long will it take 400cm3 of NH3 of diffuse under the same condition

How do you think climate change affected the strength of the hurricane?

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.