Organic Chemistry Questions

Using the periodic table, what do you know about Rubidium? It has a high electronegativity and a high reactivity It is a small atom and has a low electronegativity It has a low electronegativity and has a high reactivity It has a low electronegativity and has a low reactivity It has a high electronegativity and a low reactivity

A person fully reacts 0.75mol of magnesium metal with excess hydrochloric acid (HCI) according to the reaction below. If the products are at a pressure of 1.5atm and a temperature of 50°C, what volume of hydrogen gas was formed? (R=0.0821) Mg(s) + 2HCl(aq) --> MgCl2(aq) + H2(g) 123.2L 9.5L 19.9L 13.3L 0.0754L

Which of these is most likely to react with Strontium? Selenium Xenon Potassium None of these Argon Krypton

Explain the following trends in acidity same as yo did in question 2 FCH₂COOH > CICH₂COOH > CH3COOH>CH3CH₂OH

How will an LOL diagram show energy being conserved? Energy will be destroyed. There will be more energy in the reactants than products All energy will be accounted for There will be more energy in the products than in the reactants The energy won't change

What is true about nuclear fission? Two small nuclei come together. It is not used in atomic bombs. It is occuring in the sun. Scientists have not yet been able to harness nuclear fission to create electricity. It occurs when a large unstable nucleus splits into smaller nuclei.

The effective nuclear charge, Zeff, for a valence electron can be approximated using the core charge of the atom; that is, the net charge of the nucleus and the inner (nonvalence) electrons. Determine the core charge for an atom of Ar.

A person has 100mL of a 1M NaCl Solution. If the solution was diluted to 0.25M with water, what will the final volume of the solution be? 0.125L 50mL 200mL 300mL 400mL

Volume of the starting solution: Cyclohexane Component Vapor temperature when distillation of cyclohexane started: Vapor temperature when distillation of cyclohexane finished: Volume of cyclohexane collected: Density of cyclohexane collected: Mass of cyclohexane collected (g) 30.0 mL 80.0 °C 83.0 °C 20.1 mL 0.779 g/mL

Zinc metal and sulfuric acid (H₂SO4) react to form zinc (II) sulfate and hydrogen gas. What are the chemical formulas for the products of the reaction? ZnSO4 + H₂ Zn(SO4)2 + S ZnSO4 + H H₂SO4 + Zn ZnS + H₂

If 24g of hydrogen gas is fully reacted with excess carbon, how many particles, in moles of benzene (C6H6) will form? 6C(s) + 3H2(g)--C6H6 2.3mol Benzene 4mol Benzene 24mol Benzene 312g Benzene 12mol Benzene

Sulfur has how many valence electrons? What is it's charge when it is stable? 2,6 2,2 6, -6 6,6 6,2 6, -2

Write the curved arrow mechanism for the protonation of imidazole. Use H* (the proton) as the acid. Look at the "availability" of the lone pairs and resonance after protonation (resonance stabilization), to decide which one of the two nitrogens to protonate.

Use the pka table to select a base to deprotonate nitrous acid (HNO₂) pka = 3.35 Write the acid base reaction Calculate the equilibrium constant to demonstrate that you selected a good base. Write the curved arrow mechanism in both directions

Write the curved arrow mechanism for the dissociation of sulfuric acid in water (show all bonds and lone pairs, i.e. Lewis structures) Which will be more abundant at 25 °C, sulfuric acid or hydronium ion? Why? What type of acid base reaction is this? Define the role of water, i.e Lewis base, Brønsted-Lowry acid, etc.

If 109g of water was created in the following equation, how much energy was released? CH4(g)+202(g) CO2(g) +2H₂O) AH = -890.8 Round to two decimal places.

Which of these is the least electronegative? Sodium Rubidium Potassium Hydrogen Lithium

If a person has 621mL of a 4.2M KCI solution. How many moles of KCI would be in the solution? (1000mL-1L) Round to two decimal places.

A person places 8.2mol of sodium chloride in a beaker, and they fill the beaker with water until the 89mL mark and stir. What is the concentration (molarity) of the solution they 0.092M 92.1M 9.2M 0.011M 10.9M

A person has a 2L sample of gas with a pressure of 2atm, a temperature of 25°C. How many particles, in moles, does the person have? (R=0.0821) 0.016mol 0.16mol 2.42mol 6.12mol 100mol

A person combines 4g of A with some reactant B to form 25g of C and 8g of D according to the reaction below. Assuming the reactants were completely used up, what mass of reactant B was reacted? A+B-->C+D

What is true about an endothermic reaction? They often feel hot to the touch. More bonds are being broken than formed More bonds are being formed than broken Equal amounts of bonds are being broken and formed No bonds are being broken or formed

A scientist expects to get 5.9g of sodium chloride based on their calculations. In the lab, they collect 5.5g of sodium chloride. What is the percent yield for their reaction? 2Na(s) + Cl2(g) --> 2NaCl(s) 107% 93.2% 72% 0.9% 89%

If 3mol of solid carbon is reacted with 3mol of hydrogen gas, what mass of benzene (C6H6) is likely to form? 6C(s) + 3H2(g) --> C6H6(1) 234g Benzene 0.5g Benzene 78g Benzene 39g Benzene 24.2g Benzene

If a person has 162mol of K₂O, what mass, in grams, of K₂O doo they have? Round to two decimal places.

The FHA/VA Loan Addendum is used if (a) The seller needs to inform buyers of multiple offers. (b) The buyer is going to apply for an FHA or VA loan. (c) The buyer wants an inspection or assessment. (d) The renter wants to purchase the property.

The molarity (M) of the Ca(NO3)2 solution when 61.3 mL react with 46.2 mL of 5.2 M Na3PO4

How would you prepare the following two compounds starting from benzene? (Proper sequence of steps with proper reagents necessary for each step must be given) HO. -NH₂ HO- -NH₂

You have 125.0 mL of a solution of H3PO4, but you don't know its concentration. If you titrate the solution with a 4.56 M solution of NaOH and reach the endpoint when 134.1 mL of the base are added, what is the concentration of the acid?

Calculate the K, for the following hypothetical reaction, using the given equilibrium concentrations: [A] = 0.020 M, [B] = 0.030 M and [C]=7.74 M A (g) + 2B (g) = C() a. 4.3 x10³ b. 1.3x10* c. 7.7 x10³ d. 2.3x10€

A person reacts 87mL of a 2.3M Ca(OH)2 solution with excess iron (III) chloride. What mass, in grams, of iron (III) hydroxide is likely to form? 3Ca(OH)2(aq) + 2FeCl3(aq) --> 3CaCl2(aq) +2Fe(OH)3(s) 0.2001g 32.06g 200.1g 19.3g 14.2g

A person creates a 0.5L solution using 164.25g of solid HCI. What will the concentration (molarity) of the solution be? 328.5M 9M 15.6M 4.5M 10.25M

A person dissolves 120g of NaCl in 100mL of water. If the person dilutes their solution by adding another 300mL of water, what mass, in grams, of sodium chloride (NaCl) will be in the new solution? 12g 75.2g 120g 1200g 98.6g

What type of reaction is below? Mg(s) + 2HCl(aq) --> MgCl2(aq) + H2(g) Synthesis Combustion Decomposition Double Replacement Single Replacement

Which of the following solutions could be used to titrate a HCl solution with an unknown concentration if the titration was using a pH indicator? 1.5M HBr solution 2M NaCl solution 5.2M LICI solution 2M NaOH solution 1.68M water solution

Why does a balanced equation represent mass being conserved? Balancing an equation results in different amounts of mass in the reactants and products Balancing a reaction creates mass. Balancing a reaction results in the same molecules being present in the reactants and products. Balancing a reaction results in the same number and type of atom being present in the reactants and products. Balancing a reaction changes the type of substance being reacted, so mass is neither created nor destroyed.

What is the chemical formula for Aluminum Bisulfate? AIBI3 Al2(SO4)3 AI(HSO4)3 AI(HSO4)2 OAIHSO4

What coefficients would result in the below chemical equation being balanced? (The coefficients in the answers are written in the same order as they would be placed into the chemical equation.) Chemical Equation: _Al(s) + HCl(aq) --> ___AICI3(s) +___H2(g) 4,16,4,6 2,6,3,2 2,6,2,3 1,3,1,1 O2,3,1,1

What would the products of a reaction between aqueous copper (II) chloride and aluminum metal be? Cu +AICI CuCl2+Al AICI₂ + Cu CuAl + Cl₂ Cu + AICI 3

According to IUPAC, when counting the carbons in a branched hydrocarbon chain you would use the shortest possible chain. True False

True / False: An alcohol is an organic compound that contains the hydroxyl group True False

In a chemical reaction that takes place at a fixed pressure and volume in a calorimeter, the enthalpy change (AH) is 585 kJ/mol. Will this reaction result in an increase or a decrease in the calorimeter's water temperature? There is not enough information to know if the temperature will increase or decrease. There will be a decrease in temperature. There will be no change in temperature. There will be an increase in temperature.

Iron metal reacts with a copper sulfate solution, CuSO4(aq) Which of the following would result in the lowest rate of reaction? A solid piece of iron in 1 M CuSO4(aq) Iron powder in 1 M CuSO4(aq) Iron powder in 2 M CuSO4(aq) A solid piece of iron in 2 M CuSO4(aq)

Which of the following statements is most accurate? Energy is stored in chemical bonds and released when the bonds are broken. Energy is absorbed when chemical bonds are broken and released when new bonds form. More energy is required to form a chemical bond than the energy required to break a chemical bond. Answers A and C are both true.

M/ Ch. Hydrohalogenation involves the reaction of an alkene with which of the following? hydrogen a hydrogen halide a halogen water

What are the original and final oxidation numbers for iron in the smelting of iron from iron oxide? Fe₂O3(s) + 3CO(g) → 2Fe(s) + 3CO₂(g) No Change +3 --> 0 0 -- +2 +2 --> 0

Which of the following statements does not characterize an oxidizing agent? The oxidation number of an oxidizing agent decreases An oxidizing agent gains electrons An oxidizing agent causes another species to be oxidized An example of a good oxidizing agent is an alkali metal, such as sodium (Na)

True False: The product of a hydrogenation reaction of an aldehyde or a ketone is an ester True False

True / False; When naming compounds you can only use the cis/trans naming system for alkyne molecules. True False

M/ Ch. Many alcohols are made by the addition reaction of what two types of compounds? water and alkenes alkanes and alkenes Oesters and ethers water and alkanes