The hardness of a water sample containing 10-3M MgSO4 expressed as
CaCO3 equivalents (in ppm)
is
(molar mass of MgSO4 is 120.37 g/mol)
+
(1) 100ppm
(2) 200ppm
(3) 99.85ppm
(4) 111.5ppm

What are igneous intrusions and extrusions

One historical reason that people in the indian subcontinent have been reluctant to use livestock for food has been that a. their digestive systems are unable to handle meat and proteins b. they refused to eat meat in order to show resistance to british imperialism c. they are able to use cattle as a labor mainstay of their agriculture d. they can use the meat from cattle as fertilizer to make crops grow better

Read the sentences from the sections "the atoms" and "the electrons." there is a separate box of elements below the main table (and an odd shape for the main table, with a bite taken out of the top) because of how the other parts of the atom – the electrons – are arranged. in other words, the first element in each row starts a new shell containing one electron, and the last element in each row has two of the subshells in the outer shell fully occupied. the two sentences develop the reader's understanding of the article by