The percentage of Calcium carbonate in the 2.00 g piece of rock : 45%
<h3>Further explanation</h3>
Reaction
CaCO₃ + 2HCl ⇒ CaCl₂ +CO₂ + H₂O
V HCL = 36 cm³
M HCl = 0.5 mol/dm³
mol of HCl :

mol ratio CaCO₃ : HCl = 1 : 2, so mol CaCO₃ :

mass CaCO₃ (MW=100 g/mol) :

The percentage of Calcium carbonate :

From largest to smallest they are: Universe, galaxy, solar system, star, planet, moon and asteroid.
Answer:
Supersaturated solution
Explanation:
Weren't there any options?
Anyways, the best I can think of right now is a supersaturated solution.
We can define atomic mass the total of number of protons and number of neutrons in an atom or isotope.
<span>So when an isotope of yttrium has 39 protons and 59 neutrons, its atomic mass is equal to;
number of protons + number of neutrons = 39 + 59 = 98</span>
Answer:
d an attraction between positive ions and electrons