Question

16 identify the reactants in the following chemical equation 6 h₂o + 6 co₂ → c₆h₁₂o₆ + 6 o₂ 17 chemical reactions change substances into different substances by __________ and chemical bonds 18 a very strong base might have a ph of ______ 19 the effect of a catalyst on a chemical reaction ________ the activation energy (increase/decrease) 20 when hydrogen and oxygen combine to form water, water is the (product/reactant). 21 ________ are the smallest basic units of matter 22 the attraction among molecules of different substances is called (example: water sticking to other substances) ________ 23 ________ is the term for the amount of energy that needs to be added for a chemical reaction to start 24 this type of macromolecule, ________ is the main source of energy for living things 25 ________ are the basic building blocks of proteins (monomer) 26 a monosaccharide is the monomer of ________ 27 true or false proteins store and transmit hereditary information 28 a substance with a ph of 6 is called __________

Explanation:

1. In a chemical equation, reactants are on the left - hand side. So for $6H_2O + 6CO_2

ightarrow C_6H_{12}O_6+6O_2$, the reactants are water ($H_2O$) and carbon - dioxide ($CO_2$).

1. Chemical reactions change substances by breaking and forming chemical bonds.
2. The pH scale ranges from 0 - 14. A very strong base has a pH close to 14.
3. A catalyst decreases the activation energy of a chemical reaction, making it easier for the reaction to occur.
4. In the reaction where hydrogen and oxygen combine to form water ($2H_2 + O_2

ightarrow2H_2O$), water is the product.

1. Atoms are the smallest basic units of matter.
2. The attraction among molecules of different substances is called adhesion.
3. The amount of energy needed to start a chemical reaction is called the activation energy.
4. Carbohydrates are the main source of energy for living things.
5. Amino acids are the basic building blocks of proteins (monomers of proteins).
6. A monosaccharide is the monomer of a polysaccharide.
7. False. Nucleic acids (DNA and RNA) store and transmit hereditary information, not proteins.
8. A substance with a pH of 6 is an acid since pH values less than 7 are acidic.

Answer:

1. Water ($H_2O$) and carbon - dioxide ($CO_2$)
2. Breaking and forming
3. 14
4. Decrease
5. Product
6. Atoms
7. Adhesion
8. Activation energy
9. Carbohydrates
10. Amino acids
11. Polysaccharide
12. False
13. Acid