Metallurgy Questions and Answers

In two or more complete sentences, describe how one of the occupations that you studied would use descriptive statistics when performing their job. Justify your answers in two or more complete sentences.

A metallurgist has one alloy containing 44 % aluminum and another containing 70 % aluminum. How many pounds of each alloy must he use to make 48 pounds of a third alloy containing 64 % aluminum? (Round to two decimal places if necessary.)

Percival Pott None of these responses is correct. was the first to design a randomized double-blind trial for carcinogens in food. showed that meat cooked at a high temperature was carcinogenic. described the possibility of cancer being linked to an occupation. carried out the first cohort study on cancer. linked smoking to lung cancer.

What is the GHS classification of the substance or mixture for aluminum? Select all that apply. Flammable solids Aquatic toxicity or aquatic toxicity Specific target organ toxicity - repeated exposure Respiratory sensitisation Eye irritation Not a hazardous substance or mixture Reproductive toxicity Skin sensitisation Oral toxicity Carcinogenicity

A sample of copper absorbs 43.6 kJ of heat, resulting in a temperature rise of 75.0°C, determine the mass (in kg) of the copper sample if the specific heat capacity of copper is 0.385 J/g°C. 7.94 kg 1.26 kg 1.51 kg 3.64 kg 6.62 kg

A stock solution of HNO3 is prepared and found to contain 13.5 M of HNO3. If 25.0 mL of the stock solution is diluted to a final volume of 0.500 L, the concentration of the diluted solution is ---M. 1.48 6.75 2.70 0.270 0.675

What will be the molecular geometry of an open-chain noncyclical hydrocarbon with the generic molecular formula CnH2n-2? Tetrahedral Linear Trigonal planar Octahedral trigonal pyramidal

Which of the compounds of H₂C2O4, Ca(OH)2, KOH, and HI, behave as acids when they are dissolved in water? only HI H₂C2O4 and HI Ca(OH)2 and KOH only H₂C2O4 only KOH

Two compounds are considered as isomers if they have the: different molecular formula AND same structure. same molecular formula AND different structure. different molecular formula AND different structure. same molecular formula AND same structure. same molecular formula OR same structure.

How much energy is evolved during the reaction of 51.2 g of Al, according to the reaction below? Assume that there is excess Fe₂O3. Fe2O3(s) + 2 Al(s) → Al2O3(s) + 2 Fe(s) ΔH°rxn= -852 kJ 51.2 kJ 448 kJ 1617 kJ 808 kJ 224 kJ

Three identical flasks contain three different gases at standard temperature and pressure. Flask A contains C₂H4, flask B contains O3, and flask C contains F2. Which flask contains the largest number of molecules? flask B flask A flask C All contain same number of molecules.

Choose the statement below that is TRUE. The term "weak electrolyte" means that the substance is inert. A molecular compound that does not ionize in solution is considered a strong electrolyte. A weak acid solution consists of mostly nonionized acid molecules. A strong acid solution consists of only partially ionized acid molecules. The term "strong electrolyte" means that the substance is extremely reactive.

Consider the following reaction. How many moles of oxygen are required to produce 2.33 moles of water? Assume that there is excess C3H7SH present. C3H7SH(l) + 6 O₂(g) → 3 CO2(g) + SO2(g) + 4H₂O(g) 4.14 moles 2.33 moles 1.55 moles 6.21 moles 3.50 moles

What is the hydronium ion concentration of a 0.200 M acetic acid solution with Ka = 1.8 x 10-5? The equation for the dissociation of acetic acid is: CH3CO2H(aq) + H₂O(I) =H3O+ (aq) + CH3CO2−(aq). 1.9 × 10-3 M 4.2 x 10-2 M 1.9 × 10-2 M 4.2 × 10-3 M

The solubility of Pb(NO3)2 is 55 grams per 100 g H₂O at 20°C. Which term would properly describe a solution where 44 grams of Pb(NO3)2 is added to 100 grams of water at this temperature? unsaturated supersaturated insoluble saturated

Which one of the following processes produces a decrease in the entropy of the system? melting solid aluminum into liquid aluminum deposition of solid CO2 from gaseous CO2 dissolution of LiOH(s) in water mixing of two gases into one container evaporation of liquid hexane into gaseous hexane

Which statement about surface tension is FALSE? Items with densities lower than water will sink due to surface tension. Increased intermolecular forces increase surface tension. Liquids tend to minimize their surface area. Molecules on the surface of the liquid have fewer molecules to interact wit

In the coal-gasification process, carbon monoxide is converted to carbon dioxide via the following reaction: CO (g) + H2O (g) → CO2 (g) + H2 (g) In an experiment, 0.35 mol of CO and 0.40 mol of H₂O were placed in a 1.00-L reaction vessel. At equilibrium, there were 0.17 mol of CO remaining. Keq at the temperature of the experiment is_____________. 5.5 1.2 1.0 0.75 0.87

Lattice energy is _____ the sum of ionization energies of the components in an ionic solid the sum of electron affinities of the components in an ionic solid the energy given off when gaseous ions combine to form one mole of an ionic solid the energy required to convert a mole of ionic solid into its constituent ions in the gas phase the energy required to produce one mole of an ionic compound from its constituent elements in their standard states

What is the wavelength (angstroms) of a photon that has an energy of 4.38 x 10^-18 J? 454 angstroms 1.31 x 10^9 angstroms 6.89 x 10^15 angstroms 1.45 x 10^-16 angstroms 2.30 x 10^7 angstroms

The greater the lattice energy, the greater the charges on the participatory ions and the smaller their radii. True False

Of the following transitions in the Bohr hydrogen atom, the n=7→n=3 n=4 →n=2 n=4 → n = 7 n=3→n=2 All transitions absorb plotons of equivalent energy.

An FM radio station broadcasts electromagnetic radiation at a frequency of 90.2 MHz. The wavelength of this radiation is 2.71 x 10^10 0.301 3.33 2.71 x 10^16 3.33 x 10^6

Electromagnetic radiation with a wavelength of 665 nm appears as orange light to the human eye. The frequency of this light is 4.51 x 10^5 2.22 x 10^-15 4.51 x 10^14 2.00 x 10^11 2.00 × 10²

For this question, Kryptonite (Kp) is a fictional transition metal with all possible charges from +1 to +6. Name the following compound: KpP2 For this question, Vibranium (Vb) is a fictional metal in group 2 of the Periodic table. Write the formula for Vibranium Nitride

If you prepare a solution by adding sufficient amount of solute so that after heating and cooling the solution there is a visible amount of solid solute left in the bottom of the beaker, the solution would be considered _______ supersaturated unsaturated thermally saturated saturated

For this question, Adamantium (A) is a fictional transition metal with multiple possible charges. Write the formula for: Adamantium (II) Hyponitrite

Relate how intensity is different than texture Intensity is how Intense a plece of music Is and the texture is how hard or soft it sounds. Intensity is how dynamics, articulation and other factors that a composer may include in music affects the listener while texture is the amount of voices and how they work in cooperation with each other in a piece of music. Intensity is how hard or soft a piece of music sounds and texture is how intense it is. Intensity is how dynamics, articulation and other factors that a composer may include in music affects the musicians playing it while texture is the amount of instr and how they work in cooperation with each other in a plece of music.

Which of the following pairs represent the planning-to-operation time for Vogtle 3 and 4 reactors in Georgia? 16 years and 17 years 15 years and 16 years 16 years and 15 years 17 years and 16 years

Which of the following frequencies corresponds to light with the longest wavelength? 3.00 × 10^13 s^-1 8.50 x 10^20 s^-1 3.20 × 10^9 s^-1 9.12 x 10^12 s^-1 4.12 × 10^5 s^-1

1) What is the complete ground state electron configuration for the beryllium atom? (2) What is the complete ground state electron configuration for the titanium atom?

Give the name and formula of each of the binary compounds formed from the following elements. a. Li and P Name = Formula = b. Na and I Name = Formula = c. K and S Name: = Formula =

(1) The element with a valence electron configuration of 4s²4p² is in group ____ and period ____ (2) The element with a valence electron configuration of 2s²2p5 is in group ____ and period ____

Calculate the energy for the transition of an electron from the n=4 level to the n = 3 level of a hydrogen atom. ΔE= This is an _________ process.

A coffee cup calorimeter is filled with 200.0 mL of water at 22.1°C. A piece of metal at 48.6° C with a mass of 5.1 g is added. The final temperature of the water in the calorimeter is 26.8°C. The density of liquid water is 1.00 g/mL, and its specific heat capacity is 4.18 J/(g°C). Determine the specific heat capacity of the metal. Place your final answer in blank #1.

A 12.69 gram sample of iron is heated in the presence of excess chlorine. A metal chloride is formed with a mass of 36.85 g. Determine the empirical formula of the metal chloride.

When aqueous solutions of chromium(III) sulfate and sodium phosphate are combined, solid chromium(III) phosphate and a solution of sodium sulfate are formed. The net ionic equation for this reaction is:

A sample of neon gas occupies a volume of 7.86 L at 59.0°C and 0.900 atm. If it is desired to increase the volume of the gas sample to 9.04 L, while increasing its pressure to 1.08 atm, the temperature of the gas sample at the new volume and pressure must be ___

Compute the root-mean-square speed of He molecules in a sample of helium gas at a temperature of 183°C.

When elemental copper is strongly heated with sulfur, a mixture of CuS and Cu₂S is produced, with CuS predominating. Cu(s) + S(s) → CuS(s) 2Cu(s) + S(s) → Cu₂S(s) What is the theoretical yield of CuS when 33.70 g of Cu(s) is heated with 45.80 g of S? (Assume only CuS is produced in the reaction.) Theoretical yield = What is the percent yield of CuS if only 36.2 g of CuS can be isolated from the mixture? Percent yield =

For each of the following problems, show your calculation setup. In both your setup and answer, show units and follow the rules of significant figures. 1. Convert 78°F to degrees Celsius

Write the formula and calculate the molar mass for each of the following compounds. a. iron(II) chloride Formula: Molar mass= b. calcium sulfate Formula: Molar mass= c. copper(II) chloride Formula: Molar mass=

A sample of an unknown gas is found to have a density of 1.99 g/L at a pressure of 0.732 atm and a temperature of 43 °C. The molar mass of the unknown gas is ___ g/mol.

Aqueous solutions of potassium sulfate and ammonium nitrate are mixed together. Which statement is correct? No reaction will occur. NH₂SO4 will precipitate from solution. Both KNO3 and NH4SO4 precipitate from solution. A gas is released. KNO3 will precipitate from solution.

The name of an aqueous solution of HF is The formula of hydrochloric acid is

What is the name of the compound with the formula KOH ? What is the name of the compound with the formula NaHCO3 ? What is the name of the compound with the formula AI(CN)3 ?

Balance each of the chemical reactions. 1) CuSO4 (27) + Zn (3) → ZnSO4 (aq) + Cu (s) 2) NaOH(aq) + HC1 (ag) → NaCl (ag) + H₂O (l) 3) Mg (s) + O2 (g) → MgO (s) 4) Co(NO3)2 (aq) + Na₂HPO4 (aq) → NaNO3 (qq) + CoHPO4 (s) 5) NaHCO3 (s) + HC₂H³O2 (aq) → NaC₂H³O2 (aq) + H₂O (1) + CO₂ (g)

Which of the following is incorrectly named? PO43, phosphate ion NO³-, nitrite ion Mg(OH)2, magnesium hydroxide Pb(NO3)2, lead(II) nitrate NH4CIO4, ammonium perchlorate

What is the name of the compound with the formula NaCIO2 ? What is the formula of calcium hypochlorite ?

Categorize the following statement as observation, law, or theory: The mass of a gas that will dissolve in a liquid is directly proportional to the pressure of the gas. observation law theory