Find the empirical formula of a compound that contains 42g of nitrogen and 9g of hydrogen.

The notation for the nuclide gives information about

C2H4+ O2 CO2 + H2O A. What is my theoretical yield of H2O if I start with 9.35 g of Oz? B. If I actually produced 2.63 g of H20, what is my percent yield?

Which of these is a source of sediment? A. Fragments if other rocks B. Chemicals and minerals dissolved in water C. Sea shells D. All of the above

Which choice contains a FALSE statment? A. For the vaporization of liquid benzene ΔH is positive. B. For the formation of 1 mol nitrogen dioxide from its elements (heat is absorbed) ΔH is negative. C.

Weather is a condition of the atmosphere at a particular time and place. Wind, rain, and cloud formations are all forms of weather phenomena. What is the primary source of energy for weather phenomena?

At the same pressure, about 25 times more co2 will dissolve in plasma as o2. why does this occur?

Describe what occurs when a gas is collected by water displacement, including why a table of water vapor pressure values is needed.

The theory of plate tectonics

A sample of sodium reacts completely with 0.568 kg of chlorine, forming 936 g of sodium chloride. What mass of sodium reacted?

When do water molecule forms hydrogen bond with another water molecule which atoms are involved in the interation?