What is an example of root-pry, what happens during it.

Root pry is one of the methods of mechanical/physical weathering. Tree and plant roots dig deep into small cracks and crevices, and as they grow they pry the rock apart. In mechanical weathering, a rock's size and shape is changed, but the chemical composition remains the same  

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How can root action break up rocks?

Roots burrow down, weakening the structure of the rock until it breaks away. Plant roots can get into small cracks in the rock. As the roots grow, the cracks become larger. This causes small pieces of rock to break away.

Explanation:

answer; i believe the correct answer is (c) /// is a homogeneous mixture of gaseous substance nitrogen,oxygen and smaller amounts of other substancesmixtures can be either ( homogeneous or heterogeneous)plz check first good luck

given:

mass of na = 115 g

excess cl2

to determine:

mass of nacl produced

explanation:

given reaction is-

2na(s) + cl2(g) → 2nacl(s)

since cl2 is in excess, na will be the limiting reagent

as per the reaction stoichiometry na: nacl = 1: 1

i.e. moles of na reacted = moles of nacl formed

now, # moles of na = mass of na/atomic mass

                                  = 115 g/23 g.mol-1 = 5 moles

therefore, moles of nacl = 5

molar mass of nacl = 58 g/mol

mass of nacl = 5 moles * 58 g.mol-1 = 290 g

ans: amount of nacl produced = 290 g