Which statement BEST describes the process of magma erupting at Earth's surface? A.
It is a slow process that results in the formation of new continental crust.

B.
It is a fast process that results in the creation of new surface features.

C.
It is a slow process that only occurs when a continental plate is involved.

D.
It is a fast process that only occurs when two oceanic plates push together.

1. suppose a reaction mixture, when diluted with water, afforded 300 ml of an aqueous solution of 30 g of the reaction product malononitrile [ch2(cn)2], which is to be isolated by extraction with ether. the solubility of malononitrile in ether at room temperature is 20.0 g/100 ml, and in water is 13.3 g/100 ml. what weight of malononitrile would be recovered by extraction with (a) three 100-ml portions of ether and (b) one 300-ml portion of ether? suggestion: for each extraction, let x equal the weight extracted into the ether layer. in part (a), the concentration in the ether layer is x/100 and in the water layer is (30 x)/300; the ratio of these quantities is equal to k 20/13.3.

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have

What is the chemical name of the compound ti2o3? use the list of polyatomic ions and the periodic table to you answer.