Compound: A substance that is made up of more than one type of atom bonded together.
Mixture: A combination of two or more elements
At STP volume is 22.4 L
Molar mass NO₂ = 46.0 g/mol
1 mole ---------- 22.4 L
? mole ---------- 11.4 L
moles = 11.4 * 1 / 22.4
moles = 11.4 / 22.4
= 0.5089 moles of NO₂
Mass NO₂ :
moles NO₂ * molar mass
0.5089 * 46.0
= 23.4094 g of NO₂
hope this helps!
Answer:
the formation and evolution of stars and galaxies
Explanation:
One of the topic an astronomer will most likely study is the formation and evolution of stars and galaxies.
Astronomers are scientists that studies the universe, its components and how it works.
- An environmental scientist is concerned with pollution on a local river.
- A civil engineer is specializes in designing structures that can withstand earthquake damage.
- A biologist will observe the movement of dolphins.
It can be all of them beneficial neutral & organism
‘2’AgNO3 + Cu -> Cu(NO3)2 + ‘2’Ag