Matter can only me transformed, but not created or destroyed.
Answer
D
Explanation:
They take up usable forms of nitrogen found in soil
The maximum number of covalent bonds formed by a single carbon atom is 4
Solid water is completely clear
Answer:
1.13 x 10²⁴formula units
Explanation:
Given parameters:
Number of moles of NH₄Cl = 1.87mol
Unknown:
Number of formula units = ?
Solution:
From mole concept;
1 mole of a substance contains 6.02 x 10²³ formula units
Now;
1.87 moles of NH₄Cl 1.87 x 6.02 x 10²³ = 1.13 x 10²⁴formula units
