Answer:4 pairs of electrons
Explanation: SiCl4 is a tetrahedral because it has four pairs of electrons.
Answer:
100 J of energy are needed to heat the copper from 20∘C to 80∘C .
Answer:
the mass number is the number of protons and neutrons added and the average atomic mass is the weight of the protons and neutrons
Answer:
The law of conservation of mass represents a balanced chemical equation.
<span>The compound may have properties that are very different from those of the elements it is composed from.</span>
