In the diagram, 91 -2,00 x 10-6 C, 92" *3.80 x 106 C, and 43 - +5,30 x 10-5 C,
What is the electric potential energy Ue for
charge 42? Include the correct sign (+ or -),
91
92
93
1.15 m
2.88 m
* 에
(Remember, energy is NOT a vector) (Unit = J)
Joules (5)

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

metric time was an attempt to create a standard unit of time based off of 10, but it never took off an is not included in the metric system (si)