Choose all of the correct statements.
1-atmospheric oxygen gas is a pure substance
2-it is impossible to ever separate the components of a mixture
3-you dump a container of salt into a container of pepper to create a homogeneous mixture
4-you create a homogeneous mixture by completely dissolving your fruit punch powder in water
5-sodium and chlorine combine to form the pure substance of table salt
6-a pure substance is formed when you combine all of the ingredients for a salad for lunch

Yes the answers are 1,4, and 5

Explanation:

I know this is the answer because i just UNLEASHED MY POWER!

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

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.