Answer:
Overuse of resources makes them exhausted or entirely used up and may take centuries to replenish
Answer:
Mass = 20 g
Explanation:
Given data:
Number of moles of He = 5 mol
Mass of He = ?
Solution:
Formula:
Number of moles = mass/ molar mass
Molar mass = 4 g/mol
by putting values,
5 mol = Mass / 4 g/mol
Mass = 5 mol × 4 g/mol
Mass = 20 g
Answer:
Waves carry energy from one place to another.
Because waves carry energy,some waves are used for communication,eg radio and television waves and mobile telephone signals.
Explanation:
i hope it helps
that's my answer
correct me if im wrong
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Diamond and graphite are made of carbon. So is most of charcoal.
Answer:
D atom
Explanation:
The smallest particle of a substance that retains the chemical and physical properties of the substance and is composed of two or more atoms
