Preparation and Properties of Compounds Questions and Answers

4 8 g of sulfur and 5 4 g of aluminum react based on the chemical equation below and 4 5 g of aluminum sulfide Al2S3 are recovered from the reaction a small amount cannot be recovered 3S 2A1 Al2S3 Determine the percent yield of Al2S3 Molar mass of S 32 06 g mol molar mass of Al 26 98 g mol

Complete the table below by writing the symbols for the cation and anion that make up each ionic compound T ionic cation anion compound NaCl NiBra CaF Mnl Na T cl 0 X

Match the picture below with the substance and indicate the correct summary of this behavior This substance is C Diamagnetic It is D Paramagnetic E Ferromagnetic In a magnetic field it is This substance is A Liquid Oxygen O 1 B Liquid Nitrogen N 1 It is F Strongly attracted G Attracted H Slightly repelled A Liquid Oxygen O 1 B Liquid Nitrogen N 1 C Diamagnetic D Paramagnetic E Ferromagnetic F Strongly attracted

ch the picture below with the substance and indicate the correct summary of this be This substance is C Diamagnetic It is D Paramagnetic E Ferromagnetic This substance is A Liquid Oxygen O 1 B Liquid Nitrogen N 1 In a magnetic field it is G Attracted It is In a magnetic field it is F Strongly attracted H Slightly repelled A Liquid Oxygen 0 1 B Liquid Nitrogen N 1 C Diamagnetic D Paramagnetic E Ferromagnetic F Strongly attracted G Attracted

3 The statutory period of redemption lasts how long a one month b ten days c six months d one week

5 What is another name for the Uniform Real Estate Contract O a builder s contract b residential contract c agent contract d land contract

20 Which element is most likely to form an ionic bond with aluminum a lithium b nitrogen c lead d calcium

A. Boiling Point and Freezing Point • The presence of solute "particles" causes the to become__ • Why does the boiling point of a solution increase? - Forming a_____in a solution in a solution - Solute particles_____molecules trying to enter the bubble

SO2 reacts with H₂S as follows: 2H2S + SO2 --> 3S + 2H2O When 7.50 g of H2S reacts with 12.75 g of SO2, which statement is true? A. 0.266 moles of SO2 is consumed B. 0.111 moles of SO2 is consumed C. 0.221 moles of SO2 is consumed D.0.442 moles of SO2 is consumed

In one of his most critical studies on the nature of combustion, Lavoisier heated mercury(II) oxide and isolated elemental mercury and oxygen gas. If40.0 g of mercury(II) oxide is heated in a 502-mL vessel and 20.0% (by mass) decomposes, what is the pressure (in atm) of the oxygen that forms at 25.0°C? (Assume that the gas occupies the entire volume.)

Lead (II) nitrate reacts with excess sodium chloride. Predict the products, balance the equation and determine the number of moles of sodium chloride that are consumed during the reaction if 47.4 grams of precipitate are formed.

Circle the correct reaction that is coupled with the reaction below (Hint: it helps to draw them) dihydroxyacetone phosphate → glycerol-phosphate 1) FAD → FADH2 2) FADH2 → FAD 3) No oxidation/reduction occurs

Calculate the wavelength (in nm) of the blue light emitted by a mercury lamp with a frequency of 6.32 × 10^14 Hz (Hint: the speed of light = 3.00 x 10^8 m/s) 475 nm 190 nm 211 nm 385 nm

Draw particle diagrams of the following: BeCl₂ (s) BeCl₂ (aq) Rb3AsO4(s) Rb3AsO4 (aq)

Elements of "A Warn Path" seem exaggerated and strange. What is the literary term for this genre that Welty's writing often fits into? Realism Romanticism Southern Gothic Mysticism

The strand of gray hair discovered at the end of "A Rose for Emily" signifies that Emily was much older than Homer Barron Miss Emily has forgotten about her family Homer Barron kept a lock of Emily's hair Miss Emily has apparently lain beside the skeleton

Write the formulas for the following compounds: i. nitrogen ii. potassium fluoride iii. Lithium sulfite iv. cesium hypochlorite v. Tricarbon octahydride vi. Iron (II) oxide

Calculate the molar mass of a sample if a single molecule weighs 7.77 x 10-23 g. 7.75 x 1045 g/mol 6.02 x 1023 g/mol 7.77 x 10-23 g/mol 46.8 g/mol none of these

Classify the following reaction: HNO3(aq) + KOH(aq) → KNO3(aq) +H₂O(l) oxidation-reduction combustion precipitation acid-base two of the above

A chemist is trying to create as much glucose as possible, using the equation below. What changes could the scientist make to create more glucose? C6H12O6 + 6026CO2 +6H₂O A H=-2803kJ/mol Pressure: Concentration: Temperature:

Given is the mass of 4 sugar packages with the following masses: 2.541g 2.650g 2.100g 2.579g What is the average mass of the sugar packages? 2.480 g 2.4675 g 3.29 g 9.870 g 2.47 g 2.468 g

When a monosaccharide forms a cyclic hemiacetal, the carbon atom that contained the carbonyl group is identified as the ___________ carbon atom because Acetal; it forms bonds to an -OR and an -OR' Enantiomeric; depending on its position, the resulting ring can have a mirror image. OL: the carbonyl group is drawn to the left. D; the carbonyl group is drawn to the right. Anomeric; its substitutents can assume an alpha or beta

In the sentence below, one word is in italics. Following each sentence are four words or phrases. Select the word or phrase that best corresponds in meaning to the italicized word. Production of complex molecules, like proteins, is accomplished by replication. reproduction duplication fixation synthesis

Which of the following is a typical sign of meningococcal meningitis? A. Inability to drink water B. Light colored stools C. Nausea D. Persistent headache E. Rash on the lower extremities

Balance the redox reaction in an acidic solution using your preferred method. Show all steps and clearly indicate what species are being oxidized and reduced. P4+ HNO3 H3PO4 + NO

This disease is primarily transmitted by vector transmission: A. Bacterial conjunctivitis B. Bacterial vaginosis C. Bubonic plague D. Hepatitis B E. HIV/AIDS

The primary immune response takes about days response days to reach a peak antibody: A. 24 hours B. 3 days C. 2 weeks D. 60 days E. 6 months

The name of the protein on the surface of B cells that specifically recognizes antigens is called: A. APC B. BCR C. CD4 D. MHC E. TCR

If a person has a fever of 102°C, and they complain of feeling cold, which of the following is most likely true? A. Their temperature is going higher B. Their temperature is going lower C. Their temperature is staying the same

In a parasitic relationship, which of the following happens? A. Both partners are harmed B. Both partners benefit C. Neither partner has any harm or benefit D. One partner benefits, the other partner is harmed E. One partner benefits, the other partner is neither harmed nor helped

Which of the following can be found in all viruses? A. Nucleus B. Phospholipids C. Proteins D. Ribosomes E. RNA

The reactant in an enzyme-catalyzed reaction is called the substrate inhibitor vitamin cofactor hormone

Enantiomers are a form of stereoisomer, where each isomer in the pair has A carbon atom bonded to four different groups and the isomers are nonsuperimposeable mirror images. A carbon atom bonded to four different groups and the isomers are mirror images. The same functional groups, but a different carbon skeleton and are mirror images.

A single bond is almost always a sigma bond, and a double bond is almost always made up of a sigma bond and a pi bond. There are very few exceptions to this rule. Which of the following species have violated this generalization? Check all that apply. C2 Be2 2-, Be2 N2 2- B2 None of the above

Solution A is 8.15 M CaCl2. 11.0 mL of solution A are diluted to 420. mL of solution B. 222.0 mL of solution B are diluted to 335. mL of solution C. What is the concentration in moles per liter of solution C? (10 points total) Solution C concentration

If a weak diprotic acid deprotonates, the resulting species will be which of the following? Choose the best description below. Select the correct answer below: an acid a base both an acid and a base depends on the substance

In the serine protease mechanism, the conserved histidyl residue has what roles in the catalytic mechanism? In the serine protease mechanism, the conserved histidyl residue has what roles in the catalytic mechanism? i. Nucleophilic attack ii. Serves as a base to activate nucleophiles iii. Deprotonates serinyl iv. Deprotonates water v. Hydrogen bonds to aspartate vi. Serves as an acid in formation of the C-terminal product

A 3.458 g sample of KHP, a monoprotic acid, requires 45.71 mL of a KOH solution to reach the endpoint. What is the concentration of the KOH solution? The molar mass of KHP is 204.22 g/mol.

The amount of calcium present in milk can be determined through gravimetric analysis by adding oxalate to a sample and measuring the mass of calcium oxalate precipitated. What is the mass percent of calcium in milk if 0.429 g of calcium oxalate, CaC204, forms in a 125-g sample of milk when excess aqueous sodium oxalate is added? Na2C₂O4 (aq) + Ca2+ (aq) → CaC204 (s) + 2 Na+ (aq) 0.107% 0.202% 0.343% 1.10% 1.37%

Write a balanced chemical equation for the complete combustion of methane to produce CO2(g) as the only carbon- containing product.

How many grammes of hydrogen gas would be evolved when 18g of magnesiuM RIbbon is dissolved in 200cm³of 2 molar hydrochloric acid solution?

What is the classification of the enzyme that catalyzes this reaction? ATP + protein → ADP + phosphoprotein Oxidoreductase Ligase Transferase Isomerase I DON'T KNOW YET

Calculate the pH of a solution formed by mixing 65 mL of a solution that is 0.26 Min NaHCO3 with 75 mL of a solution that is 0.22 Min Na2CO3.

Calculate [H] for each of the following solutions at 25°C, and state whether the solution is neutral, acidic, or basic. a. 3.7x10-4 M OH™ b. 2.9x10-9 MOH™ HOW DO WE GET THERE? What is [H] for a solution with 3.7×10-4 M OH at 25°C?

A mixture of nitrogen and methane gases, in a 6.75 L flask at 12 °C, contains 5.48 grams of nitrogen and 2.74 grams of methane. The partial pressure of methane in the flask is ____ atm and the total pressure in the flask is _____atm.

SO2 reacts with H₂S as follows: 2H2S + SO2 -> 3S + 2H₂O When 7.50 g of H₂S reacts with 12.75 g of SO2, which statement is true? A. SO2 is the limiting reagent B. S is the limiting reagent C. H₂S is the limiting reagent D. H₂O is the limiting reagent

Sodium thiosulfate Na2S2O3, the major component in photographic fixer solution, reacts with silver bromide to dissolve it according to the following reaction AgBr(s) + 2Na2S2O3(aq) NasAg(S2O3)2(aq) + NaBr(aq) How many moles of Na2S2O3 would be required to react completely with 0.610 g of AgBr? How many ml of 0 017 M Na2S₂O3 contain this number of moles?

A sample of chlorine gas has a density of ____ g/L at a pressure of 0.793 atm and a temperature of 54 °C.

In the laboratory you dissolve 20.0 g of ammonium fluoride in a volumetric flask and add water to a total volume of 250 mL. What is the molarity of the solution? What is the concentration of the ammonium cation? What is the concentration of the fluoride anion?

Consider the reaction: 2 NaBH4(aq) + H₂SO4(aq) → 2 H₂(g) + Na2SO4(aq) + B₂H6(g) What volume, in mL, of a 0.535 M solution of NaBH4 is required to produce 0.514 g of B₂H6? H₂SO4 is present in excess.