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There are two main types of physical weathering: Freeze-thaw occurs when water continually seeps into cracks, freezes and expands, eventually breaking the rock apart. Exfoliation occurs as cracks develop parallel to the land surface a consequence of the reduction in pressure during uplift and erosion.
Answer:
70.92u
Explanation:
The atomic mass expresed at fisrt (69.7u) is a combination of the atomic masses of both isotopes multiplied by their natural abundance. So we can describe "(68.9*.604)+(x*.396)=69.7" the as the equation neccesary to solve this problem, where x is the atomic mass of gallium-71. x=70.92.
Answer:
Sodium hydroxide - NaOH
Potassium hydroxide - KOH
Magnesium hydroxide - Mg(OH)2
Calcium hydroxide - Ca(OH)2
Explan