Based on the wavelengths and 1. The electromagnetic spectrum is organized into different (1) groups
frequencies of the waves.
2. (2)
harmful.
waves have low frequency and low (3)
which is low enough that the waves are not
a. Each wave has a wavelength longer than (4) 30cm
b. On Earth, radio waves are usually produced by(5)
which is often long enough to move around objects.
moving in a(n) (6)

whats the meaning of /

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

i belive it is water