Chemical Reactions and Reaction Rates

In a chemical reaction, what term best describes the substances present at the beginning of the reaction?

Which type of chemical reaction is represented by the general equation $A + B \rightarrow AB$?

Which of the following is always a product of a combustion reaction?

Which factor does NOT typically increase the rate of a chemical reaction?

What effect does a catalyst have on a chemical reaction?

In the balanced chemical equation, $2H_2(g) + O_2(g) \rightarrow 2H_2O(g)$, what do the numbers '2' in front of $H_2$ and $H_2O$ represent?

Which type of reaction is exemplified by $MgCl_2 + Li_2CO_3 \rightarrow MgCO_3 + 2LiCl$?

What does it mean for a chemical equation to be balanced?

Based on the principles of balancing chemical equations, what adjustment is permissible?

According to the mole map, what conversion factor is used to convert from moles to grams?

If 9.11 x 10^23 atoms of $H_2O$ are present, how many moles of $H_2O$ are there?

What information do molecular formulas provide?

What is the purpose of calculating the empirical formula of a compound?

What is the role of the limiting reactant in a chemical reaction?

What is the 'theoretical yield' in the context of a chemical reaction?

What is the oxidation number of oxygen in most compounds?

In the context of redox reactions, what does 'OIL RIG' stand for?

What characterizes a reducing agent in a redox reaction?

What process occurs at the anode in an electrochemical cell?

What condition applies when determining the standard cell potential?

When is a redox reaction considered spontaneous based on the $\E°_{cell}$ value?

Which of the following factors explains why a sugar cube dissolves more slowly than the same mass of powdered sugar?

How does increasing pressure typically affect reactions involving gaseous reactants?

What distinguishes an electrolytic cell from a galvanic cell?

How would stirring or agitating a reaction mixture affect the rate of a chemical reaction, and why?

What is the oxidation number of nitrogen in $NH_4NO_3$?

What is the oxidation state of sulfur in $NaHSO_4$?

Considering its impact on reaction rate, which statement best describes the role of an inhibitor?

Which of the following scenarios accurately describes the application of redox reactions in everyday life?

Given 14.8g of propane ($C_3H_8$) and 34.4g of oxygen ($O_2$), what is the number of moles of carbon dioxide ($CO_2$) produced in the reaction $C_3H_8 + 5O_2 \rightarrow 3CO_2 + 4H_2O$ given that oxygen is the limiting reagent.

Nicotine contains 74.02% C, 8.710% H, and 17.27% N. If 40.57g of nicotine contains 0.2500 mol, what is the molecular formula of nicotine?

Consider the reaction: $Zn(s) + Cu^{2+}(aq) \rightarrow Zn^{2+}(aq) + Cu(s)$. Given the standard reduction potentials: $Zn^{2+}(aq) + 2e^- \rightarrow Zn(s), , E° = -0.76V$ and $Cu^{2+}(aq) + 2e^- \rightarrow Cu(s), , E° = +0.34V$. What is the standard cell potential ($E_{cell}^°$) for this reaction?

When a substance gains electrons during a chemical reaction, what happens to its oxidation number?

In the context of chemical reactions, what is the significance of light intensity for photochemical reactions?

What aspect of reactant nature most significantly affects the rate of a chemical reaction?

A mysterious compound is found to be 30.45% Nitrogen and 69.55% Oxygen by mass. What is the empirical formula of this compound?

What is the most important reason to avoid drinking bleach?

What role do coefficients play in a balanced chemical equation?

In a double displacement reaction, what is primarily exchanged between the reactants?

Which type of chemical reaction involves one substance breaking down into two or more simpler substances?

What effect does increasing the temperature typically have on the rate of a chemical reaction?

According to the 'mole map', what conversion is facilitated by molar mass?

What is the oxidation number of hydrogen when combined with nonmetals?

What is the oxidizing agent in a redox reaction?

According to the provided information, what is the oxidation number of Group 2A elements in compounds?

What type of energy conversion primarily occurs in a galvanic cell?

What effect does stirring or agitating a reaction mixture have on the rate of a chemical reaction?

Which factor does NOT affect the rate of a chemical reaction?

How does increasing the concentration of reactants affect the rate of a reaction?

How does the presence of an inhibitor affect a chemical reaction?

What is the purpose of balancing a chemical equation?

In electrochemistry, what process occurs at the cathode?

In the standard cell potential, what conditions are assumed?

According to the provided information, what is the main component of drinking bleach that makes it dangerous?

What is the relationship between the empirical and molecular formulas of a compound?

Why does increasing the surface area of a solid reactant increase the reaction rate?

What change is permissible when balancing chemical equations?

If 3 moles of $H_2O$ are present, how many atoms are present?

A compound is found to contain 30.45% nitrogen and 69.55% oxygen. What is the empirical formula?

Given the thermochemical equation: $2H_2(g) + O_2(g) \rightarrow 2H_2O(g)$, what happens to the oxidation state of hydrogen as the reaction proceeds?

How can you spot the limiting reagent, if you only know the starting mass of each of the reagents?

Consider the reaction $2 MgI_2 + Mn(SO_3)_2 \rightarrow 2 MgSO_3 + MnI_4$. What type of reaction is this?

Given the reaction $N_2 + 3H_2 \rightarrow 2NH_3$, if you begin with 5.0 g of $N_2$ and 5.0 g of $H_2$, which is the limiting reagent?

Given the number of grams, how would you convert to number of atoms/molecules/particles?

In the context of chemical reactions, under what conditions does increased pressure particularly affect the reaction rate?

Consider the unbalanced equation: $C_5H_9O + O_2 \rightarrow CO_2 + H_2O$. After balancing, what is the coefficient for the water?

What happens to an apple when it is cut and turns brown? What is the classification for this type of reaction?

What is the oxidation number of oxygen in $CaO$?

What is the oxidation number of nitrogen in $N_2$?

Corrosion primarily involves which type of process?

Consider a scenario where you need to determine the mass % composition of hydrochloric acid (HCl). What initial step is required to solve this problem?

What is the key difference between electrolytic and galvanic cells?

You have a reactant, $AB$, which decomposes into $A$ and $B$. If the initial mass of $AB$ is 100 grams and, after the reaction, you have 40 grams of $A$, what is the mass of $B$ produced, assuming the reaction goes to completion and follows the law of conservation of mass?

How would you characterize the reaction $2 N_2O_5 \rightarrow 4 NO_2 + O_2$?

If 50 g of $NaCl$ is present, how many moles are there?

What is the mass % composition of Hydrogen in water?

What is the mass of 20 moles of $H_2O$?

A galvanic cell is constructed using zinc and copper electrodes. Given that zinc is more active that copper and the Zn electrode is labelled as the anode: which direction do the electrons flow?

In the redox reaction $Zn + Cu^{2+}(aq) \rightarrow Zn^{2+}(aq) + Cu$, which species is being oxidized?

How do you determine the number of formula units per molecule?

In a chemical reaction, what is the role of reactants?

Which type of chemical reaction involves two compounds exchanging ions or bonds to form two different compounds?

What is the defining characteristic of a combustion reaction?

According to collision theory, what is the primary reason that increasing temperature generally increases the rate of a chemical reaction?

How does increasing the concentration of reactants affect the rate of reaction, and why?

What is the effect of increasing the surface area of a solid reactant on the rate of a chemical reaction?

How does stirring or agitating a reaction mixture typically affect the reaction rate, and why?

What is the impact of an inhibitor on the rate of a chemical reaction?

How does increasing pressure typically affect the rate of reactions involving gaseous reactants, and why?

For photochemical reactions, what is the effect of increasing light intensity on the reaction rate?

In the context of balancing chemical equations, what parameters can be adjusted to ensure the conservation of mass?

What is the correct way to balance the following chemical equation: $H_2 + O_2 \rightarrow H_2O$?

According to the principles of balancing chemical equations, which of the following actions is permissible?

What is the molar mass of a substance?

How is the molar mass of a compound calculated?

If you have 10.0 grams of $H_2O$, how many moles of $H_2O$ do you have?

If a substance is composed of 73.9% mercury and 26.1% chlorine by mass, what is its empirical formula?

A compound has an empirical formula of $C_5H_7N$ and a molar mass of approximately 162 g/mol. What is the molecular formula of the compound?

What is the significance of the limiting reactant in a chemical reaction?

In the reaction $C_3H_8 + 5O_2 \rightarrow 3CO_2 + 4H_2O$, if you start with 1 mole of $C_3H_8$ and 4 moles of $O_2$, which reactant is the limiting reactant?

Given 14.8g of propane ($C_3H_8$) and 34.4g of oxygen ($O_2$), what is the limiting reagent in the reaction $C_3H_8 + 5O_2 \rightarrow 3CO_2 + 4H_2O$?

In redox reactions, what process is defined as the loss of electrons?

In redox reactions, what happens to a substance that is reduced?

Consider the half-reaction: $Zn \rightarrow Zn^{2+} + 2e^-$. What process is occurring, and what type of agent is zinc in this reaction?

During the 'browning' of an apple, what process occurs?

What type of reaction is represented by the following transformation: $Cu^{2+} \rightarrow Cu$?

How does electrochemical change chemical energy?

In an electrolytic cell, what kind of reactions occur?

In electrochemistry, what distinguishes the anode from the cathode?

What is the primary purpose of hair rebonding, and which type of chemical agents are utilized in this process?

For the compound $NaHSO_4$, what is the oxidation number of sulfur (S)?

What are the oxidation numbers for all of the atoms in $KNO_3$?

If the standard reduction potential ($E°$) for $Zn^{2+}(aq) + 2e^- \rightarrow Zn(s)$ is -0.76V and for $Cu^{2+}(aq) + 2e^- \rightarrow Cu(s)$ is +0.34V, what is the standard cell potential ($E°_{cell}$) for the reaction $Zn(s) + Cu^{2+}(aq) \rightarrow Zn^{2+}(aq) + Cu(s)$?

Given the reaction: $Zn + Cu^{2+}(aq) \rightarrow Zn^{2+}(aq) + Cu$, and knowing Zinc is more active than copper, is the reaction spontaneous?

Which statement accurately describes the difference between galvanic and electrolytic cells?

Under which circumstances could the volume of each of the following situations be calculated with the constant 22.4L?

Where on a chemical formula can coefficients be placed to balance an equation?

What is the general equation corresponding to a decomposition reaction?

Which situation best represents a synthesis reaction?

What is the fundamental relationship between moles, grams, and molar mass?