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Herе's link tо thе аnswer:
To find the third angle, we add the two known angles.
47 + 43 = 90
The sum of all the angles of a triangle is always 180.
Therefore, we subtract 90 from 180 to find the third, unknown angle.
180 - 90 = 90
Because 90 degrees is the third angle, and 90 degrees is a right angle, this is a right triangle.
mass of na = 115 g
mass of nacl produced
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