Answer:
2.1 mol
Explanation:
68.1g / 34.1 g/mol = 2.1mol
Answer:
Atom
Explanation:
The atom is the simplest unit of matter that has all the properties of an element. It is made up of 3 subatomic particles: protons, electrons and neutrons.
Knocking out the other choices, the cell is the basic unit of life. An electron is only part of an atom, which has its own properties, while a compound is a combination of two or more elements that are chemically bonded.
Answer:
You also know about the mass of that sample, if you know the moles
(First option)
Explanation:
Moles = Mass / Molar mass
Moles . Molar mass = Mass
For example, I have 4 moles of H₂O
Molar mass H₂O = 18 g/m
4 m . 18 g/m = 72 g
If I have 4 moles of H₂O, I also have 72 grams of water too.
Answer:
kinetic
Explanation:
kinetic energy starts the motion of water which in turn converts electricity
Answer:
5.22 x 10^-5
Explanation:
5.22 x 10^-3 x 10^-2 = 5.22 x 10^-5