Answer:
Metals:
Copper: to make cooking utensils such as pots because it has a high heat conductivity.
Aluminium: to make aluminium foil / soda cans because it is malleable
Mercury: fills up thermometers because it can indicate the temperature when it expands. But it is toxic so fewer people are using mercury thermometers now.
Titanium: to make the body of supersonic aircrafts because it is strong and corrosion resistant
Gold: to make jewelry because it is shiny and also corrosion resistant
Non-metals:
Nitrogen: to fill up chip packages because its molecules are unreactive
Helium: to fill up balloons because it is lightweight
Hydrogen: for generating electricity in hydrogen fuel cells. It is environmentally-friendly because it does not produce any greenhouse gas or toxic pollutants.
Fluorine: added in toothpaste for strengthening the teeth. It can also prevent cavities.
Carbon: the graphite in pencils. this is one form of carbon. Other common forms (allotropes) of carbon include diamond and Buckminsterfullerene (buckyball).
Answer:
Chemical I would assume.
Explanation:
This is because drugs have chemicals in them.
Ba(OH)₂ + 2HCl = BaCl₂ + 2H₂O
n(HCl)=c(HCl)v(HCl)
n{Ba(OH)₂)}=c{Ba(OH)₂}v{Ba(OH)₂}=2n(HCl)=2c(HCl)v(HCl)
v{Ba(OH)₂}=2c(HCl)v(HCl)/c{Ba(OH)₂}
v{Ba(OH)₂}=2*0.250*0.020/0.100=0.100 L = 100 mL
1. Is a (primary)
2. Is 2 (c)
3. Not sure sorry ✨
4. HBr (b)