Answer:
In FeO iron atom exist as Fe+ cation but in Fe2O3 iron atom exist as Fe3+ cation.
Explanation:
Feo=Fe+ + O-
Fe2O3 =2Fe3+ + 3O2-
The difference in the charge of iron cation deeply affect the compound formulas because in FeO the Fe cation has 1 unit positive charge where in Fe2O3 the Fe cation has 3 units positive charge.
That"s why these two chemical compounds made up of similar atoms differ in their chemical formulas.
The purpose of an universal indicator is to test wether a solution is acid or if its a base. It changes colors according to the PH's. It helps a lot in the indication of a chemical reaction because it can say if <span>each component loses or gains protons depending upon the acidity or basicity of the solution being tested.An universal indicator can say if a determined solution proves to be endothermic or exothermic. If the solution is not tested as acid or base then we cannot knwo if there will be an endothermic reaction or an exhotermic one</span>
About 4-5 not all at once
Answer: The metalloids are Boron, Silicon, Geranium, etc and are found to the right of the metals and the left of the nonmetals. Since that is not an option, the best choice would be: The metalloids are located below nonmetals and above metals within a group.
Explanation:
From the given balanced chemical reaction it is signified that in every 1 mole of H2 will require 2 moles of K. Using the concept of ratio and proportion, with x being the number of moles of H2,
2/1 = 0.3/x
The value of x from the equation, 0.15 moles.