General organic chemistry Questions and Answers

Match each of these acids or bases to their corresponding conjugate acid or base. H3PO4 ⇒ CH3COOH → H₂CO3 ⇒ OH ⇒> CN ⇒ PO4³-

How many moles of water, H₂O, contain 2.0 x 1022 molecules of water? (See the hints for assistance in interpreting scientific notation.) Express the quantity in moles to two significant figures.

A sample of hydrogen gas occupies 250 mL at 90 mmHg. For a gas sample at 25°C, determine the number of moles of hydrogen present in the sample. 10,962 moles 826.4 moles 0.0000912 moles 0.920 moles 0.00121 moles

Rank the following gases by the number of moles they would contain at STP, greatest to least. 30 L of helium gas, 0.5 moles of oxygen gas, 67.2 L of nitrogen gas. Helium Nitrogen Oxygen

You have 33.6 L of neon gas at STP. How many moles is this? 1.5 moles 22.4 moles 752.64 moles 11.2 moles J

In the context of small molecules with similar molar masses, arrange the intermolecular forces by strength. London dispersion forces hydrogen bonding Strongest Weakest Answer Bank dipole-dipole interactions

Calculate the pressure; in atm, of 0.0158 mole of methane (CH4) in a 0.275 L flask at 27 °C. 0.13 atm 1.4 atm 1.6 atm 0.71 atm

Determine the new temperature in °C for a sample of neon with the initial volume of 2.5 L at 15 °C, when the volume is changed to 3550 mL. Pressure is held constant. 21.3 °C 294 °C -252 °C 136 °C 409 °C

Correctly rearrange Charles' Law to solve for the unknown in the following problem: Determine the new temperature in °C for a sample of neon with the initial volume of 2.5 L at 15 °C, when the volume is changed to 3550 mL. Pressure is held constant.

A sample of nitrogen (N₂) has a volume of 50.0 L at a pressure of 760 mmHg. What is the volume of gas at a pressure of 1500 mmHg if there is no change in temperature? 0.010 L 25 L 0.040 L 96.7 L

You are using your hot air balloon to travel. At constant pressure, you decrease the temperature of the gas by turning down the flame. What do you expect to happen to the volume of the 400 L balloon as the temperature decreases? about the same as 400 L; temperature alone does not affect volume more than 400 L; as temperature decreases the volume will increase less than 400 L; as temperature decreases, volume also decreases more information is needed to make a determination

Suppose there is a gaseous mixture of nitrogen and oxygen. If the total pressure of the mixture is 440 mmHg, and the partial pressure of nitrogen is 250 mmHg, calculate the partial pressure of oxygen in the mixture using Dalton's law.

When nitric acid (HNO3) reacts with sodium bicarbonate (NaHCO3), the products are a. hydrogen (H₁₂) and sodium carbonate (Na₂CO3). b. carbon dioxide (CO₂), water (H₂O), and sodium nitrate (NaNO3). C.carbon dioxide (CO₂), water (H₂O), and sodium carbonate (Na₂CO3). d. water (H₂O) and sodium nitrate (NaNO3). e.cwater (H₂O) and sodium carbonate (Na₂CO3).

Which of the statements are evidence that gases do not always behave ideally? When two gases are mixed, they follow Dalton's law of partial pressures. It is impossible to compress a gas enough so that it takes up no volume. CO₂ gas becomes dry ice (solid CO₂) at 1 atm and -78.5 °C. At 4 K and 1 atm, helium is a liquid.

Gases produced by a chemical reaction can easily be collected over water. To determine the pressure of the dry gas, the vapor pressure of the water at that temperature must be subtracted from the total pressure. 1) Consider the following reaction: Mg(s) + 2HCl(aq) -> MgCl₂(aq) + H₂(g) The total pressure of gas collected over water is 650.0 mmHg and the temperature is 22.0°C What is the pressure of hydrogen gas formed in mmHg?

Insulin is.............. that regulates.............. level in the body A. steroid hormone, protein transport B. proteohormone, blood glucose C. lipoprotein, lipid transport D. enzyme, competitive inhibition E.storage protein, iron( Fe2+)

A fatty acid salt can act as a soap to remove grease because A. the nonpolar tails of the salt cause the salt to float on the surface of the water B. the nonpolar tails of the salt dissolve in the grease and the polar salt ends dissolve in water C. the polar salt ends dissolve in the grease and the nonpolar tails cause the resulting molecules to on water. D. the salt molecules combine with grease and either Ca2+ or Mg2+ to form a precipitate. E. the grease molecules form a thin layer around each salt molecule, making them soluble in water.

Answer each question below and upload an image of your handwritten work. Show ALL your work for full credit. Credit will not be granted if only the answer is shown with no work. 1) A 15.0 mL solution of H₂CO3 at an unknown concentration is titrated with 0.215 M KOH solution. If it requires 26.19 mL of KOH solution to reach the equivalence point, what is the concentration of the H₂CO3 solution? H₂CO3(aq) + 2 KOH(aq) → 2 H₂O(l) + K₂CO3(aq) 2) How many grams of sodium phosphate (Na3PO4) are in 125.0 mL of a 0.432 M solution of sodium phosphate? The molar mass of sodium phosphate is 163.94 g/mol.

Complete the table below comparing the polarities of two bonds. Enter more or less in the blank to complete the statement correctly. B-F is polar than C-F P-O is polar than P-S B-F is polar than B-N

Compare the electronegativities of each pair of atoms. Enter the symbol for the element of each pair that has the greater electronegativity. (If both atoms would be expected to have the same electronegativity, enter the word same.) Symbol for element with greater electronegativity Pair Mg and O Al and C Li and O

0.003 grams of alcohol in a 15 ml sample of blood 0.006 grams of alcohol in a 5 ml sample of blood 0.01 grams of alcohol in a 12 ml sample of blood 0.006 grams of alcohol in a 20 ml sample of blood Not significantly impaired (< 0.03% m/v) Impaired (≥ 0.08% m/v) = 0.006 grams of alcohol in a 5 ml sample of blood 2021 Chamberlain University LLC. All rights reserved. = 0.003 grams of alcohol in a 15 ml sample of blood = 0.01 grams of alcohol in a 12 ml sample of blood = 0.006 grams of alcohol in a 20 ml sample of blood

A. A main group element with the valence electron configuration 2s22p5 is in periodic group It forms a monatomic ion with a charge of B. A main group element with the valence electron configuration 2s¹ is in periodic group It forms a monatomic ion with a charge of

If I have 82 ml of a solution with a molarity of 5.3 M NaBr, how many ml of a 1.1 M NaBr solution can I prepare? 0.07 ml 17.0 ml 478.1 ml 395.1 ml

Predict the products of the reactions below and make sure each is balanced: each, 0.5 points for balance, 0.5 points for each product) HBr + NaOH →

Use the generic elementary steps shown to below to answer the following questions. A + B ---> C + D Elementary Step 1 (slow) A + D ---> C+E Elementary Step 2 (fast) a. Based on the provided elementary steps, but is the net reaction?

The Lewis structure for CIF₂+ is shown. What is the electron-pair geometry and the molecular geometry around the central atom? Electron Pair Geometry: Molecular Geometry:

Which one of the following molecules is nonpolar? Multiple Choice NH3 OF2 CH₂Cl

What would be the molarity of a solution made by dissolving 4.1 grams of NaCl (molecular mass: 58.44 g/mole) in water to a total volume of 0.4 ters 0.4 M 0.18 M 141.6 M 7.3 M

Be sure to answer all parts. Predict the geometry of the following species using the VSEPR model. Type the number corresponding to the correct geometry in the box next to the formula. (a) PCl3 (b) CHCl3 (c) SIH4 (d) TeCl4 Electron Domain Molecular 1 - bent 2 - linear 3-octahedral 4 - seesaw-shaped 5-square planar 6-square pyramidal 7- tetrahedral 8- trigonal bipyramidal 9- trigonal planar 10 trigonal pyramidal 11 - T-shaped

Be sure to answer all parts. Tin (Sn) exists in Earth's crust as SnO₂. Calculate the percent composition by mass of Sn and O in SnO₂. % Sn % O

Ethane and acetylene are two gaseous hydrocarbons. Chemical analysis show that one sample of ethane contains 2.65 g of carbon and 0.668 g of hydrogen, and one sample of acetylene contains 4.56 g of carbon and 0.382 g of hydrogen. Write reasonable empirical formulas for these compounds. Ethane: Acetylene:

What is the molarity of a solution prepared by dissolving 6.0 grams of NaOH (molecular mass = 40.0 g/mol) to a total volume of 300 ml. 0.5 M NaOH 133.3 M NaOH 20.0 M NaOH 2.0 M NaOH

Be sure to answer all parts. Write chemical formulas for the following molecular compounds: (a) nitrogen triiodide (b) tetranitrogen decoxide (c) xenon trioxide (d) diiodine pentoxide

Joe checked his display in his car and saw that he traveled 97 km in 100 minutes. What is Joe's average speed in miles per hour? The conversion factor you will need for this question is: 1 mile = 1.60934 km miles per hour. (Round to the nearest tenth)

Write the abbreviated electron configurations for the elements below. Sulfur Manganese

Which functional group(s) would be added to 1 methylcyclohexene using the reagents below: Br2, H₂O ketone and aldehyde hydrogen bromine and hydrogen bromine and hydroxyl ketone hydrogen and hydroxyl bromine hydroxyl aldehyde

Dimensional Analysis 1: Unit Conversions:Question 1 Complete the conversion indicated in the image. 7meters to inches (1 meter = 39.4 inches). Round to two decimal places when necessary (5.05).

Draw the unique stereoisomers for 2-chloro-2,3-dimethylpentane. Show stereochemistry clearly. To ensure proper grading, explicitly draw all four groups, including wedge/dash bonds, around a chirality center. Indicate whether the compounds could exist in an optically active form.

Jailah needs a replacement for lithium for a science experiment. She tries silicon, but it does not work. Using what you know about patterns in the periodic table, which advice would you give Jailah? A. Try a lanthanide series element. B. Try a non-metal from the halogen group. C. Try an element in the same group as lithium. D. Try an element in the same period as lithium.

Blast furnaces extra pure iron from the iron(III) oxide in iron ore in a two step sequence. In the first step, carbon and oxygen react to form carbon monoxide: 2C(s) + 02(8)⇒2 CO (g) In the second step, iron(III) oxide and carbon monoxide react to form iron and carbon dioxide: Fe₂O3(s) + 3CO(g)⇒ 2Fe(s) + 3 CO₂ (g) Suppose the yield of the first step is 72.% and the yield of the second step is 91.%. Calculate the mass of oxygen required to make 10.0 kg of iron. Be sure your answer has a unit symbol, if needed, and is rounded to 2 significant digits.

Pure magnesium metal is often found as ribbons and can easily burn in the presence of oxygen. When 3.82 g of magnesium ribbon burns with 7.80 g of oxygen, a bright, white light and a white, powdery product are formed. Enter the balanced chemical equation for this reaction. Be sure to include all physical states. equation: What is the limiting reactant? magnesium oxygen If the percent yield for the reaction is 80.1%, how many grams of product were formed?

Aqueous hydrochloric acid (HCI) reacts with solid sodium hydroxide (NaOH) to produce aqueous sodium chloride (NaCl) and liquid water (H₂O). What is the theoretical yield of water formed from the reaction of 0.36 g of hydrochloric acid and 0.24 g of sodium hydroxide? Round your answer to 2 significant figures.

Consider a compound with the fictional element Tiktokium (Tk). The element Tk has 6 valence electrons and, like most elements, prefers an octet of 8 electrons around it. CTKBr2 (carbon is central) Draw the Lewis structure and answer the following questions: a. What is the total valence electron count for this compound? b. How many double bonds are there? c. How many single bonds are there? d. How many lone pairs are there total? e. How many lone pairs are around the Tk atom? f. How many lone pairs are around the Catom?

What is the symbol for the atom that has the electron configuration 1s²2s²2p63s²3p64s²3d7?

The Lewis dot symbol consists of the symbol for the element surrounded by dot(s). What does the dot or dots represent? Multiple Choice electron configuration valence electrons atomic number atomic mass core electrons

Liquid octane (CH3 (CH₂) CH3) will react with gaseous oxygen (O₂) to produce gaseous carbon dioxide (CO₂) and gaseous water (H₂O). Suppose 68.5 g of octane is mixed with 84. g of oxygen. Calculate the maximum mass of water that could be produced by the chemical reaction. Round your answer to 2 significant digits.

During exercise, muscle cells break down glucose (C6H12O6) to provide energy. This chemical reaction is represented by the following chemical equation. C6H12O6 + 602⇒ 6CO2 + 6H₂O + energy glucose oxygen carbon dioxide water How does this equation show the conservation of mass? Energy is created by breaking apart molecules. The mass on each side of the equation is the same. Mass is conserved when it is converted to heat. Glucose is broken down into smaller molecules.

Conservation of Mass:Question 1 Which of the following is a correctly written chemical equation that demonstrates the conservation of mass? Mg + HC1 → H+MgCl2 KC103 → KC1+O₂ H₂ + O₂ → H₂O H₂O+CO₂ → H₂CO3

What is the common name of this compound? A) trimethylamine B) diethylamine C) ethylmethylamine D) ethylmethylnitride E) ethyldimethylamine

Which solution contains the largest number of chloride ions? 50.0 mL of 0.60 M MgCl₂ 200.0 mL of 0.40 M NaCl 50.0 mL of 0.60 M AICI,