Inorganic Chemistry Questions

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 most common reactions involving aromatics are addition elimination reduction oxidation substitution reactions.

The type of bond that is most important in maintaining secondary structure of a protein is: Hydrogen bonding between the side chain (eg. R) atoms. Salt bridges between the side chain (eg. R) atoms. Disulfide bridges. The unique chemical bonds between hydrogen and any other atom in the same molecule. Hydrogen bonding between atoms that comprise the backbone.

Long chains of glucose molecules are involved in the structure of lipids nucleic acids proteins polysaccharides

Which of the following is an important and practical method of preventing nosocomial infections in a hospital? A. Do not allow any visitors to people staying for more than one day B. Eliminate all diseases from society C. Prevent babies and the elderly from entering the hospital D. Quarantine or separate patients who have serious communicable infections E. Require everyone entering the hospital to take broad-spectrum antibiotics

n the compound propene, C₂H=CH-CH3, the single bond between two carbon atoms is Shorter than the double bond. stronger than the double bond. longer than the double bond. equal to the double bond in bond strength.

When catalyzed by the enzyme, sucrase, sucrose decomposes to yield glucose and fructose. The reaction is hydrolysis fermentation. denaturation. esterification.

Genetic information is passed in what sequence? Proteins to RNA to DNA RNA to DNA to proteins RNA to proteins to DNA DNA to RNA to proteins

A segment of a DNA molecule transcribes a base sequence, AGAUAU, on an mRNA codon. The compatible sequence on the tRNA anticodon is UCUAUA UUAGCG CGCAAA AAUAUA

Which compound is a tertiary alcohol? 2-methyl-1-hexanol 3-hexanol 1-propanol 3-methyl-2-hexanol 2-methyl-2-hexanol

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

This compound is a(an) CH3CH(NH2)COOH aldehyde amino acid alpha-keto acid acetal

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.

Which of the following molecules would be classified as a ketone? CH3CH2CH(CH3)CH(OH)CH3 HCH2CH2CH2CH2CHO CH3CH2CCH2CH3 CH3CH2CH2CHO

The basic building block of carbohydrate is amino acid starch glucose chitin

The generic formula for an alkane, aliphatic hydrocarbon is CnH2n+2. Which formula below, corresponds to propane? C3H9 C3H8 C3H6 C2H6

The number of different alpha-amino acids in polymers of amino acids is 26 92 20 50

Inasmuch as the molecular formula for glucose is C6H12O6 and the molecular formula for fructose is C6H12O6 the two substances are isomers epimers anomers hextomers

Carbohydrates are a combination of carbon, hydrogen, and oxygen in an approximate ratio of 1:1:1 2:1:2 1:2:1 3:2:1

Of the following, which is an aromatic compound? ethyl alcohol methane chloroform toluene

Organic substances made up of several amino acids bond together are carbohydrates. saccharides. fatty acids. proteins.

Rubbing alcohol is methyl alcohol phenol Oethyl alcohol isopropyl alcohol

The compound that has the greatest polarity is CH3CH2CH2CH2CH2CI CH3CH2CH2CH3 CH3CH2CH2CH2CH2OH CH3CH2CH2CH2CH3

How does decreasing surface area of the reactants affect the rate of a reaction? decreases reaction rate does not affect reaction rate not enough information phyided to answer increases reaction rate

For each mixture of two solutions in water, what precipitate(s) will form? If no precipitate will form, write "none". KCI and AgNO3: Na3PO4 and CaBr₂: MnCl₂ and NaOH: Pb(C₂H3O2)2 and H₂SO4:

Write the balanced chemical equation for the reaction of aluminum with hydrochloric acid, HCI (aq). Equation: a.) Calculate the volume of hydrogen produced at STP by the complete reaction of 17.0 g of aluminum with hydrochloric acid. b.) Calculate the mass of aluminum chloride obtained by the complete reaction of 25.0 ml of 2.65 M hydrochloric acid with a sample of aluminum.

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

If 76.1 grams of NaCl are dissolved in 34.0 mL of Sulfuric acid (sulfuric acid has a density of 1.84 gram per mL), calculate the following concentration measures. a. Weight/volume percent b. Weight/weight percent c. Molarity

Acetylene reacts with oxygen by the following balanced chemical reaction. 2 C2H2(g) + 5O2(g) → 4CO2(g) + 2 H₂O(g) If 55.0 grams of O2 is reacted with an excess of C2H2 (O2 is the limiting reagent), how many grams of CO2 are produced and how many grams of H₂O are produced? (10 points)

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

A 230. mL sample of a 0.275 M solution is left on a hot plate overnight; the following morning the solution is 1.10 M. What volume of solvent has evaporated from the 0.275 M solution? 288 mL 230 mL 63.3 mL 58.0 mL 172 mL

You are supposed to dissolve a small amount of Cu solid metal in HCl (aq). Based on your observation you would be able to determine if copper metal dissolved in this acid. Using standard reduction potential table predict whether Cu metal and Ni metal will dissolve in HCl acid. Write appropriate reduction and oxidation reactions, use standard reduction potential values to support your answer.

A. What is the electron-pair geometry for N in NOBr? There are ___ lone pair(s) around the central atom, so the molecular geometry (shape) of NOBr is ___ B. What is the electron-pair geometry for B in BF4-? There are ___ lone pair(s) around the central atom, so the molecular geometry (shape) of BF4- is ___

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

Which one of the following is correct concerning nonnutritive sweeteners? Randomized controlled trials have shown that nonnutritive sweeteners are an effective tool for weight loss. Unrefined cane sugar can be labeled as a nonnutritive sweetener. None of these statements is correct. The presence of a nonnutritive sweetener does not have to be indicated on a food label. Nonnutritive sweeteners may actually be associated with a long-term increase in BMI. Only aspartame has been shown to lead to significant weight loss.

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

Name the type of chemical reaction that occurs when magnesium chloride solution (MgCl₂) reacts with sodium carbonate solution (Na2CO3). Explain why aluminum (Al) would react with copper chloride (CuCl₂) but not with magnesium chloride (MgCl₂).

During the course of a titration experiment, you notice that no matter how much base you add to the sample of acid, the color of the solution does not change. In fact, you have added three times the amount of base you expected to add! What is the next thing you should do to troubleshoot this problem? Redo your calculation to make sure you are expecting the correct amount of base. Try the titration with another base. Maybe this one doesn't react with your acid. Put everything into the waste container and start over. Add a few drops of indicator to your flask. Perhaps you forgot to add them.

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.

Give a reason, based on intermolecular forces (LDF, Hydrogen bonds, dipole-dipole, ion-dipole, etc), why the boiling point of HF (MW = 18 g/mol; BP = 18.5 °C) is so much higher than Methane (CH4, MW 16 g/mol; BP = -164 °C). =

In which choice are the 0.1 M aqueous solutions of salts below ranked according to decreasing pH? NH4Br, NaBrO2, NaBr, NaClO2 (a) NaBr>NaBrO2> NaClO2>NHBr (b) NH4Br > NaBrO₂ > NaBr > NaClO2 (c) NaBrO₂> NaClO₂ > NaBr > NH4Br (d) NaBrO₂> NH4Br > NaClO2 > NaBr

Free radicals None of these responses is correct. can donate electrons to DNA. donate electrons to antioxidants. are only found in foods that contain protein. can be neutralized by antioxidants. can only be neutralized by polyphenols.

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%

Imagine yourself being a chef of a restaurant. You prepare a variety of food, all of which contains protein. What agent is used to denature the protein in the following dishes? Charcoal BBQ chicken Marinated beef Meringue Steak tartare (raw chopped beef) Salt pork

Let's revisit your answer to the question from before. What do you think now? Let's say you wanted to calculate the density of a liquid to see if it will float on top of water. The mass of the liquid is 5.5 grams, and the volume of the liquid is 26 mL. If density is mass divided by volume, which of the answers below would be correct? Select all that apply. 0.21 0.211 0.2 0.21153

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?

At 25 °C and 1.0 atm pressure, what is the minimum quantity of dry air needed to combust 1.3 L of CH4 (g) comp to CO₂(g)? Remember that oxygen is present in the atmosphere to the extent of 209,480 parts per million.

Identify the Bronsted acids and bases in the following equation (A= Bronsted acid, B = Bronsted base): HSO3 + CN → HCN + SO3²- A + B -> A + B B + A -> A + B A + B -> B + A B + A -> B + A B + B -> A + A