HELP ASAP 20 Points Question 3 (1 point)
Though some bacteria cause disease and illness in humans, the majority are harmless. Some bacteria are used to aid digestion, used in preparation of certain foods, used to battle infections or used by industry. Bacteria have many important roles in nature. All BUT ONE is a role of bacteria out in the world around us.

Question 3 options:

Some bacteria increase the soil fertility.

Bacteria carry out 60% of total nitrogen fixation in natural ecosystems.

Bacteria are responsible for converting sunlight into usable chemical energy.

Bacteria decompose organic matter, by decay and putrefaction, to keep our earth clean.

answer: you could do some invislibe ink.

explanation: i will tell you how to if u answer my question.

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

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.

colorless gas, exhibiting a blue glow when placed in an electric field

b) solid

its a type of rock