Preparation and Properties of Compounds Questions and Answers

Which of the following correctly groups the tabs which hold the command to draw a text box in a publication? Home and Insert File and Home File and Page Design Home and Page Design

Required question: to answer the question you can draw, create a text box, or both. A student mixes aqueous solutions of xium (II) phosphate and potassium iodide. A precipitate of xium (II) iodide forms. In the space below write a balanced chemical equation for the reaction. The symbol for xium is "X" (include its charge when needed.) Remember to balance the charges, balance the equation, and provide states of matter.

All of the following are associated with the Pentagon Papers EXCEPT: 1) New York Times 2) Soviet Union 3) Secret documents 4) Daniel Ellsberg

Just like isotopes of atoms, M&Ms can vary slightly in their mass. What part of the procedure determining the average mass of an M&M could you change to increase your odds of getting a more accurate answer of total M&Ms in the cup? Explain. Hint: What would be a good sample size to use to obtain a reliable average mass?

The objective measure of social class uses either education, income, occupation or place of residence, Individually. To overcome the problem of status inconsistency associated with this measure, researchers often combine several of them to derive people's ..... occupational prestige economic class position socio-economic status (SES) political affiliation

Fatima and Agnes first met in ESL Class. (main) It was at Aurora Central High School. (adj) Fatima and Agnes who was at Aurora Central High School first met in ESL Class. Fatima and Agnes who first met in ESL Class was at Aurora Central High School. Fatima and Agnes first met in ESL Class which was at Aurora Central High School. Aurora Central High School was where Fatima and Agnes first met.

I had many great teachers in high school. (main) They are all very old now. (adj) I had many great teachers who are all very old now in high school. I had many great teachers in high school which are all very old now. I had many great teachers in high school whose are all very old now. I am very old now but I had many great teachers in high school.

Currently, there are several television programs dedicated to criminal investigation scenarios. Viewers can learn about forensics, investigation strategies, procedure, etc. What effect might these kinds of shows have on future investigators? On future criminals?

If you had the opportunity to travel into outer space or to the ocean's floor, which would you choose? Why? What do you imagine would be the best and worst parts of your journey?

Rubbing alcohol sold in stores is aqueous 2-propanol, CH,CHOHCH₂(aq). Rubbing alcohol is available in concentrations of 70.% and 91% 2-propanol by volume. To make 100. mL of 70.% aqueous 2-propanol, 70. mL of 2-propanol is diluted with enough water to produce a total volume of 100. mL. In a laboratory Investigation, a student is given a 132-mL sample of 91% aqueous 2-propanol to separate using the process of distillation. Determine the maximum volume of 2-propanol in the 132-mL sample.

(a) What is the mass, in grams, of 2.50 x 10³ mol of ammonium phosphate? (b) How many moles of chloride ions are in 0.2550 g of aluminum chloride? (c) What is the mass, in grams, of 7.70 x 1020 molecules of caffeine, C₂H₁N₂O₂? (d) What is the molar mass of cholesterol if 0.00105 mol has a mass of 0.406 g?

A key step in balancing chemical equations is correctly identifying the formulas of the reactants and products. For example, consider the reaction between calcium oxide, CaO(s), and H₂O(1) to form aqueous calcium hydroxide. (a) Write a balanced chemical equation for this combination reaction, having correctly identified the product as Ca(OH)₂(aq). (b) Is it possible to balance the equation if you incorrectly identify the product as CaOH(aq), and if so, what is the equation?

Balance the following equations: (a) Al C₂(s) + H₂O(l) → Al(OH),(s) + CH₂(g) (b) C5H₁0O₂(1) + O₂(g)--CO₂ (g) + H₂O(g) (c) Fe(OH),(s) + H₂SO₂(aq)--Fe₂(SO₂),(aq) + H₂O(1) (d) Mg N₂(s) + H₂SO4(aq) → MgSO.(aq) + (NH₂)2(SO4) (aq)

Combustion analysis of a sample is used to determine that there were 1.54 mole carbon, 5.78 molesHydrogen and 0.771 mole oxygen in the original sample. If the molar mass of the compound is approximately 285 g/mol, what is the molecular formula? C10H6906 C12H45O6 C13H3306 C12H77O4 C12H2907

A 12.88 gram sample is known to contain only carbon, hydrogen and oxygen. Combustion analysis of the sample produces 29.1972 g of CO₂ and 14.6970 g of H₂O. Determine the carbon, hydrogen and oxygen moles in the original sample.

Zinc sulfide reacts with oxygen according to the reaction: 2 ZnS(s) + 3 O₂(g) → 2 ZnO(s) + 2 SO2(g) A reaction mixture initially contains 4.2 mol ZnS and 6.8 mol O2. Once the reaction has occurred as completely as possible, what amount (in moles) of the excess reactant remains?

Which of the following best]describes the requirements for becoming a Supreme Court Justice? * Must be a lawyer from Harvard Must be an American citizen There are no specific requirements for becoming a Supreme Court Justice Must be at least 45 years old

What is the molar mass of Co₂O3 in the following balanced chemical equation: 2 C0₂03(s) + 3 C(s) ---> 4 Co(s) + 3 CO2(g) Hint: Coefficients are NOT used when determining molar masses. 74.93 g/mol 133.87 g/mol 165.86 g/mol 331.73 g/mol 208.80 g/mol

In lab, you are given a solid sample containing 10.5 grams of MgBr2 (Molar mass = 184.113 g/mol) How many bromine atoms are present in the sample? 3.43 x 1022 bromine atoms 6.87 x 1022 bromine atoms 1.72 x 1022 bromine atoms 1.06 x 10^25 oxygen atoms

A perfect cube of Al metal was found to have a mass of 16.2 g. If the density of Al is 2.7 g/cm³, then the length of each side of the aluminum cube is

Amino acids make peptides and proteins. Draw the structures of the following compound between parentheses: The amino acid (Alanine), (Tryptophan), (Tyrosine) and (a- amino, ß-hydroxy butanoic acid)

Round the following numbers to 4 significant figures and write the rounded number on the line. Use scientific notation if needed to get the correct number of significant figures. (1 point per answer, 4 points total) a. 0.00470060 b. 439990 c. 1.2456x10^4 d. 2.0501

Drago's rule is used, when we compare compounds having different central atom but same surrounding atoms. It says lone pair occupies stereo chemically inactive "S" orbital Which of the following do not obey drago rule. CH₁ ASH H₂Se BiH,

What is the specific heat (J/g °C) of the metal? Express your answer using two significant figures.

Caroline takes a bath containing 8.5 kg of water, but as time passes it cools off to 19°C. James doesn't want to follow his sister in a cold bath, so he asks for more water to be added. How much water do I need to add to the tub if the water is 49°C when it comes out of the faucet so that the final temperature in the tub is 38°C? (Put your answer in kilograms - no units in Canvas)

Calculate the heat change in kilocalories for condensation of 9.0 kg of steam at 100 °C. Express your answer as a positive value using two significant figures and include the appropriate units.

Condiser the following solutions or compounds : (i) [He(g) + O₂(g)] (ii) HCI in aq. solution (iii) NaCl in aq. solution (iv) NH3 (9) Total number of cases where ion-dipole interaction is present = x Total number of cases where hydrogen bonding is present = y Total number of cases where only London dispersion forces are present = z The value of √(y+z) / x is

The equilibrium reaction below has the following equilibrium mixture concentrations: SO3 = [0.0894], SO₂ = [0.400] and O2 = [0.200] with Kc = 4.00 If the concentration of O2 at equilibrium is decreased to [0.100], how and for what reason will the equilibrium shift. Be sure to calculate the value of the reaction quotient, Q, and use this to confirm your answer. 2 SO3 (g) ↔ 2 SO2 (g) + O2(g)

To help us get better at naming molecules that contain two or more functional groups, I am going to have you submit a picture of a molecule that has two functional groups, with at least one of the functional groups being a C=O group. Here are a few other rules for your structure: It must be different than the molecules in your notes and problem set. It must be different from any of your classmates posted below (I've allowed you to see other answers before you post.) This isn't as hard as it sounds, change from a 5 membered ring to a 7 membered ring, change from carboxylic acid to ester, change from cyclic parent chain to acyclic, etc. Make sure you are able to name that molecule based on the information in the text. If I am unable to name the molecule you've provided, I will deduct 5 points from your grade, per structure. Make sure the image is embedded in the thread and not attached as something you must download to see. You do not have to explain anything when you post your image, just post them.

A chemist determines by measurements that 0.0450 moles of chlorine gas participate in a chemical reaction. Calculate the mass of chlorine gas that participates. Round your answer to 3 significant digits.

For the Lewis electron dot formula for hydrogen silicon trichloride, HSICI3, there are REDS around the Si and the shape is note: Add a number, then a letter. a) planar trigonal b) linear c) diatomic d) tetrahedral e) pyramidal f) bent

How many molecules of oxygen, O2, would 7.80 g of Al(OH)3 produce? 1.42 x 10^22 molecules of O₂ 4.09 x 10^22 molecules of O₂ 9.02 x 10^22 molecules of O₂ 5.06 x 10^22 molecules of O₂ 8.42 x 10^22 molecules of O₂

A piece of solid gold (specific heat 0.129 J/g °C) at 227.4 °C is placed into 50.0 mL of water at 24.1 °C. The final temperature of both the metal and water is 26.2 °C. Assuming that all heat is transferred between the metal and water, what is the mass of the piece of metal? 16.9 g 172 g 0.439 g 12.4 g

4. (8 pts) A sample of an amino acid decomposes into 5.851 grams of carbon, 1.145 grams of hydrogen, 2.274 grams of nitrogen, and 2.598 grams of oxygen. a. (2pts) What is the mass percent of each element in this compound? C: 49.30% H: 9.648% N: 19.16% O: 21.89%) b. (1pt) What was the mass of the sample decomposed? 11.868 grams c. (2pts) What is the empirical formula of the compound? (C2H7NO) d. (1pt) What is the empirical formula mass of the compound? 73.1 g/mol e. (1pt) If the molar mass is 146.2 g/mol, what is the molecular formula? (C6H14N2O2) f. (1pt) How many moles of the sample were decomposed? (0.0812 mol)

1. What is the role of the manganese (IV) oxide (MnO) in this reaction 2. Write a reaction equation for the decomposition of hydrogen peroxide to produce oxygen 3. Why is the oxygen collection jar (the container in this case) filled with water before collecting the oxygen?

An 8 oz glass of water contains 13.13 mol of water. How many molecules of water are in the glass? 7.91 x 10^24 molecules 2.18 x 10^-23 molecules 4.82 x 10^24 molecules 6.02 x 10^23 molecules

At 570. mm Hg and 25 °C, a gas sample has a volume of 2270 mL. What is the final pressure (in mmHg) at a volume of 1250 mL and a temperature of 175 °C?

The yellow dye, tartrazine, has been implicated in which one of the following health problems? cancer of the pancreas allergy stomach cancer None of these options is correct. liver cancer hypertension

A 170 g sample of a metal was placed into a graduated cylinder containing 75.4 mL of water. The volume of water rose to 98.3 mL. Find the density (g/ml) of the metal

What is the total volume of gaseous products formed when 25.9 liters of butane (C4H10) react completely according to the following reaction? (All gases are at the same temperature and pressure.) butane (C4H10) (g) + oxygen (g) carbon dioxide (g) + water(g) _____ liters products

Infrared radiation has frequencies from 3.0x10^11 to 3.0x10^14 Hz, whereas the frequency region for ultraviolet radiation is 3.0x10^15 to 3.0x10^16 Hz. We can say that: 1. The speed of infrared radiation is _____ ultraviolet radiation. 2. The wavelength of infrared radiation is _____ ultraviolet radiation.

Among the given statements : (1) Hypophosphoric acid has two P = O bonds. (2) Pyrophosphorous acid has two P-O-H bonds. (3) Phosphorous acid can undergo oxidation as well as reduction when heated (4) Pyrosulphurous acid has one S-O-S bond. The correct statements are: 1 and 2 only All of the above 3 and 4 only 1, 2 and 3 only

At 700 K the equilibrium constant Kc for the reaction between NO(g) and O₂(g) forming NO₂(g) is 8.7 x 106. The rate constant for the reverse reaction at this temperature is 0.54 M-¹s 1. What is the value of the rate constant for the forward reaction at 700 K?

Which of the following occurs as the wavelength of a photon increases? The frequency decreases. The speed decreases. Planck's constant increases. The energy increases. None of the above occurs as the wavelength of a photon increases.

The fuel used in many disposable lighters is liquid butane, C4H10. How many carbon atoms are in 4.00 g of butane? Express your answer numerically in atoms.

Glycation is a process which contributes to an enhanced sex drive due to increased absorption of tryptophan. process which links protein chains with simple sugars. process which contributes to a decreased sex drive due to increased absorption of tryptophan. None of these options is correct. positively charged amino acid. method of describing what happens when the white of an egg solidifies.

Calculate the mass of 1.00 x 10^24 (a septillion) molecules of water. Express the answer numerically in grams.

Metal M is a light-red metal, which is soft, malleable, and ductile. It melts at 1038°C. Because of its positive standard electrode potential it is insoluble in hydrochloric acid and in dilute sulphuric acid, although in the presence of oxygen some dissolution might take place. Medium-concentrated nitric acid (8M) dissolves metal readily. If coloured solution MSO4 obtained by dissolving metal in conc. H2SO4 is diluted & treated by KI excess, precipitate of metal(I) iodide is formed, which is white, but the solution is intensely brown because of the formation of triiodide ions. Select CORRECT regarding above information. If a clean iron nail or a blade of a penknife is immersed in a solution of a metal salt, a red deposit of metal is obtained Metal salt solution of "M" shows redox reaction with Na2S2O3 Solution obtained by reaction of metal "M" & AgNO3aq produce colorless solution with excess NH4OH Oxide of metal M (i.e. MO) dissolves in dil. HCI but not in excess KOH

The molecular formula mass of this compound is 180 amu. What are the subscripts in the actual molecular formula? Enter the subscripts for C, H, and O, respectively, separated by commas (e.g., 5, 6, 7).

Dolomite is a substance sold in health food stores. Select the correct statement. Due to the toxic nature of dolomite, it has been banned in the U.S. and Canada. Dolomite can contain toxic heavy metals such as mercury. Dolomite is a mixture of calcium and magnesium carbonate and is always purified to eliminate other elements. This product is mainly magnesium sulfate and is soluble in water. This substance is not a good source of calcium as it does not dissolve well in water. None of these statements is correct.