There are many types of chemical reactions. Four are described below: Synthesis: Two or more reactants combine to form a single product. For example, 2H2 + O2 → 2H2O. (Synthesis reactions are also called combination reactions.)
Decomposition: One reactant breaks down to form two or more products. For example, 2KCl → 2K + Cl2.
Single replacement: An element reacts with a compound to form another element and compound. For example, Zn + 2HCl → ZnCl2 + H2.
Double replacement: Two compounds react to form two different compounds. For example, FeS + 2HCl → FeCl2 + H2S.

Identify the following examples as one of the four choices (from above). In these examples, I’m using letters (A, B, C, D etc) to represent chemical symbols more simply.
Example: X + YZ -> XZ + Y, you would say this is an example of a single replacement reaction.

ABCD -> A + CD + B

AD + CB -> AC + BD

AC + BD -> ACBD

D + EG -> DG + E

Can somebody please help me?? have a blessed day god bless!! - Natalia

answer; i believe that the correct answer is (c) explore the outer planets; / plz check good luck

h let me think

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.