Based on the above image, which of the following is true?
a. mass could have either been gained or lost during this chemical reaction because atoms always
change mass when they react.
b. mass was conserved in this chemical reaction because the same atoms are present in both the
products and the reactants.
c.
mass was lost in this chemical reaction because the atoms in the reactants are smaller than the
atoms in the products.
d. mass was gained in this chemical reaction because there are more atoms in the products than there
were in the reactants.

Covalent network solids typically have melting points and boiling points. the chemical formula of a network solid indicates in the molecule.

Oxidation-reduction reactions (often called "redox" for short) are reactions that involve the transfer of electrons from one species to another. oxidation states, or oxidation numbers, allow chemists to keep track of these electron transfers. in general, one element will lose electrons (oxidation), with the result that it will increase in oxidation number, and another element will gain electrons (reduction), thereby decreasing in oxidation number. the species that is oxidized is called the reducing agent or reductant. the species that is reduced is called the oxidizing agent or oxidant. to sum up: oxidation = increase in oxidation state = loss of electrons = reducing agent reduction = decrease in oxidation state = gain of electrons = oxidizing agent part a which element is oxidized in this reaction? fe2o3+3co→2fe+3co2 enter the elemental symbol. view available hint(s) is oxidized part b which element is reduced in this reaction? 2hcl+2kmno4+3h2c2o4→6co2+2mno2+2kcl+4h2o enter the elemental symbol. view available hint(s) is reduced

Analyze how limestone is weathered and identify the features that are formed as a result of this dissolution