Topsoil is usually eroded first because it

For the reaction represented by the equation 2hno3 + mg (oh) 2® mg (no3) 2 + 2h2o, how many grams of magnesium nitrate are produced from 8.00 mol of nitric acid, hno3, and an excess of mg (oh) 2?

Salt domes result when: 1. inland seas dry 2. the pressure of overlying rock forces the salt to rise 3. a layer of sedimentary salt is buried by newer sediment depositions 4. all of the above

Hardness and density are physical properties. true false

Consider this initial-rate data at a certain temperature for the reaction described by N2O3 ( g. - > NO ( g. + NO2 ( g. N2O3 (M) =.1 (initial rate =.66) =.2 (initial rate = 1.32) =.3 (initial rate = 1.98) find k?

David found that water can be created in a lab by burning hydrogen gas in air. He concluded that water is not a compound because only hydrogen was used to form water. What is wrong with David's conclusion

Which particles make up the nucleus of an atom? protons and electrons neutrons and electrons protons only protons and neutrons neutrons only

An egg is fried is that a physical or a chemical change

How many mono-; di -; and trichloro derivatives are possible for cyclopentane?

A gas occupies 3.60 L when the temperature is 45.0oC and at 1.02 atm of pressure. What temperature change (in K) will be needed to change the volume to 6.25 L at constant pressure?

When did Pangaea begin to break apart? a. 20 million years ago c. 250 million years ago b. 100 million years ago d. 2 billion years ago.