AIR
How many % oxygen in thete in the air?
21%
Why mustn’t acids and bases be determined in the lab by tasting?
They are corrosive
What can be produced from used plastic bottles?
Clothes, lights
What kind of gas is there in the air the most?
N2 nitrogen
What acid can be found in our stomach?
Hydrochloric acid, HCl
What gases are causing climate warming?
CO2, CH4, H2O
What gas in the air promotes combustion?
O2 oxygen
What acid does CocaCola contain?
H3PO4, phosphoric acid
How many new plastic bags will come into use in the world in one minute?
Million!
What gas do the plants use in photosynthesis?
CO2 carbon dioxide
What basis is used for soap-making?
NaOH sodium hydroxide, soapstone
The excess content of which elements causes the eutrophication of water bodies (excessive growth of plants and algae)?
N, P, K (nitrogen, phosphorus, potassium)
What gas do the plants produce in photosynthesis?
O2 oxygen
What substance formes by the reaction of NaOH with HCl (NaOH+HCl)?
NaCl sodium chloride, cooking salt
How long will disposable nappies fall apart in the nature?