Look at the dichotomous key below showing characteristics of different snakes. Striped
N
Black rat snake
Black, yellow, and red
Y
N
Black nose
Common krait
Y
N
Coral snake
Scarlet snake
What is a possible difference between a coral snake and a scarlet snake?
O Coral snakes have a red nose, and scarlet snakes have a black nose.
O Coral snakes have a black nose, and scarlet snakes have a red nose.
Coral snakes are striped, and scarlet snakes have a solid color.

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.

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