varying composition is not a property of a pure substance
Its definitely gotta be b im pretty sure
The balanced chemical equation for the formation of methane from carbon and hydrogen is,
C + 2H2 --> CH4
This suggests that every 12 grams of C needs 4 grams of H in order to produce 16 grams of methane.
0.05 grams of hydrogen (H2) x (16 grams methane / 4 grams H) = 0.2 grams of methane.
1.20 grams carbon x (16 grams carbon / 12 grams of C) = 1.6 grams methane
We take the lower amount of carbon. Thus, the reaction will produce approximately 0.2 grams methane.
In chemical reactions, the substances present at the start of the reaction are called reactant, and the substances produced are called product
The atoms of a chemical element can exist in different types. These are called isotopes. They have the same number of protons (and electrons), but different numbers of neutrons. Different isotopes of the same element have different masses. Mass is the word for how much substance (or matter) something has.
Isotopes are atom families that have the same number of protons, but different numbers of neutrons
Each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.
