A molecule is a group of bonded atoms. The molecule represents the smallest unit of a chemical compound.
Answer:
Calcium is a metal.
Explanation:
It is considered a metal because it is most likely to give away it's two valence electrons to reach Argon. All the elements in gray are metals.
Answer: Heterogeneous
Explanation: Heterogeneous catalysts are catalysts that are in a different phase than the reactants. For example, the catalyst might be in the solid phase while the reactants are in a liquid or gas phase. A catalyst that is in the same phase as the reactants is called a homogeneous catalyst. Enzymes are an example of homogeneous catalysts, and acids can also be homogeneous catalysts.
The balanced reaction is:<span>
Mg (s) + 2HCl (aq)
--> MgCl 2 (aq) + H 2 (g)
We
are given the amount hydrochloric acid to be used for the reaction. This will
be the starting point of the calculation.
40.0 g
HCl ( 1 mol HCl / 36.46 g HCl)
(1 mol H2 / 2 mol HCl) (2.02 g H2 / 1 mol H2) = 1.11 g H2</span>
Answer:
The answer is B
Explanation:
Blood is heterogenous because the blood cells physically separate from the blood plasma and lemonade is homogenous because it has the same uniform appearance and composition throughout.