<span>Ferns and reptiles appeared in the paleozoic era.</span>
Answer:
Ethyne, C2H2, has a 5 covalent bond between the two carbon atoms.
ethane C2H6, has a 6 covalent bond
Explanation:
Ethyne are covalent compounds since these compound involve bonding between two non metals. In H2S H 2 S , the compound is formed when sulfur shares two of its valence electrons with two hydrogen atoms through a covalent bond
Ethane
6 bonds between C−H and one is between C−C. The six hydrogen atoms will each share their 1 electron with carbon to form six carbon-hydrogen covalent bonds. The two carbon atoms will each share their 1 electron to form one carbon-carbon covalent bond
Methane (CH4) and oxygen (O2) react to produce carbon dioxide (CO2) and water (H2O). CH4 and O2 are the reactants, while CO2 and H2O are the products.
That is a steep slope for sure, no doubt about it. Hope this helps!
Mass of Oxygen : 18.8 g
<h3>Further explanation</h3>
Reaction(balanced) :
4Fe + 3O₂ → 2Fe₂O₃
mass Fe = 43.7 g
mol Fe(MW= 55,845 g/mol) :
mol O₂ : mol Fe = 3 : 4, so mol O₂ :
Mass O₂(MW=32 g/mol) :
Or simply you can Conservation of mass, where the masses before and after the reaction are the same
<em>mass reactants=mass products</em>
mass iron+mass oxygen=mass iron (III) oxide
43.7 g + mass oxygen=62.5 g
mass oxygen = 62.5 - 43.7 = 18.8 g
