Let's answer your questions one by one:
1. Why does a higher concentration increase the rate of reaction?
Answer: a) It increases the frequency of collisions. A higher concentration means that there are more reactant particles in a given volume, which leads to an increased frequency of collisions between those particles. More collisions increase the likelihood that reactants will interact and form products, thus increasing the rate of reaction.
22. Which of these elements on the Periodic Table is the most electronegative?
Answer: C) F (Fluorine) Fluorine is the most electronegative element on the periodic table, with an electronegativity value of around 4.0 on the Pauling scale.
23. Looking at the periodic table, determine the number of valence electrons present in Potassium (K).
Answer: C) 1 valence electron Potassium (K) is located in Group 1 of the periodic table, which means it has one valence electron.
24. This chemical reaction is balanced. 1 C2H5OH + 2 O2 → 2 CO2 + 3 H2O
Yes, the equation you provided is a balanced chemical reaction. The number of atoms of each element on the reactant side (left side) is equal to the number of atoms of each element on the product side (right side):
- Carbon: 2 (from C2H5OH) = 2 (from 2 CO2)
- Hydrogen: 6 (from C2H5OH) = 6 (from 3 H2O)
- Oxygen: 4 (from 2 O2) = 4 (2 from 2 CO2 + 3 from 3 H2O)
If you have any more questions or need further clarification, feel free to ask!