Answer:
0.4444 g/cm³ ≅ 0.44 g/cm³ (2 significant figures).
Explanation:
<em>d = m/V,</em>
where, d is the density of the material (g/cm³).
m is the mass of the material (m = 28 g).
V is the volume of the material (V = 63.0 cm³).
<em>∴ d = m/V </em>= (28 g)/(63.0 cm³) = <em>0.4444 g/cm³ ≅ 0.44 g/cm³ (2 significant figures).</em>
The atomic number tells you the number of electrons. That means there are 18 electrons in an argon atom.
It's 1. Melting a substance. The rest are chemical changes
Answer:
The law of reflection states that the angle of incidence and the angle of reflection are always equal.
Answer:
There are 12 protons, and 10 electrons in an Mg2+ ion, the normal amount of neutrons is 12.
Explanation:
