Metallurgy Questions and Answers

25 grams of oxygen gas is heated in a container with a volume of 500 mL to 350 C What is the pressure in the container

If I have an unknown quantity of gas held at a temperature of 900 K in a container with a volume of 25 0 liters and a pressure of 36 0 atm how many moles of gas do I have

Concentrated sulfuric acid (18.3 M) has a density of1.84 g/mL. (a) How many moles of H₂SO4 are in each milliliter of solution? (b) What is the mass % of H₂SO4 in the solution?

What is an abstract noun? A word that names a person, place, animal, thing, or idea Ideas, emotions, or qualities that can exist in our minds only and not perceived by our senses. A group which is taken as a single unit

Identify the type of verb used in the following sentence. He waited an hour. Both transitive and intransitive Intransitive verb Transitive verb

For the reaction 2S(s)+30₂(g) →→2SO₂(g) if 5.94 g of S is reacted with 10.0 g of O₂, how many grams of SO3 will be produced? 29.7 g 7.42 g 16.7 g 14.8 g none of these

Which of the following is a disaccharide? maltose chitin glucose cellulose

Of the following, a human blood disease that has been definitely shown to be due to a hereditary factor or factors is polycythemia pernicious anemia. leukemia Sickle cell anemia.

A covalent bond between 2 amino acid molecules can be created by Removing a water molecule from them. inserting a water molecule between them. Inserting a carbon atom between them. Removing a carbon atom from one of them.

What is a scarce resource for an individual? Capital Land and labor Energy and skill

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

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

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

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

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

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

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

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)

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.

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). =

How many lone pairs are on the central atom in BC13? How many lone pairs are on the central atom of BrF3?

What is the bond order of F- OF? What is the bond order of O2 ?

Predict which fatty acid would have the lowest melting point. CH₂(CH₂CH=CH),(CH₂),COOH (cis configuration) CH₂(CH₂) COOH CH (CH₂) CH-CH(CH₂) COOH (cis configuration) CH (CH) CH-CHCH₂CH-CH(CH) COOH (cis configuration) I DON'T KNOW YET

The empirical formula of a certain hydrocarbon is CH₂. When 0.125 moles of this hydrocarbon is completely burned with excess oxygen, it is observed that 8.40 Liters of CO₂ gas are produced at STP. What is the molecular formula of the unknown hydrocarbon? a) CH₂ b) C₂H4 d) C3H₁ e) C4H8 c) C₂H₂

A sample of methane gas at a pressure of 0.721 atm and a temperature of 27.4 °C, occupies a volume of 11.9 liters. If the gas is allowed to expand at constant temperature to a volume of 20.2 liters, the pressure of the gas sample will be ___ atm.

Glucose is consumed in the presence of oxygen to afford carbon dioxide and water as shown in the balanced reaction: 602 + C6H1206-> 6CO2 + 6H20 If one mole of Glucose is allowed to react with 5 moles of oxygen, which statement is correct? A oxygen is the limiting reactant B. Glucose is the limiting reactant C water is the limiting reactant D. carbon dioxide is the limiting reactant

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. 3.4 grams of H₂S remains when reaction is complete B. 0.36 grams of SO2 remains when reaction is complete OC. 0.98 grams of H₂S remains when reaction is complete D.5.3 grams of SO2 remains when reaction is complete

A 13.37 g sample of an unknown hydrocarbon undergoes combustion in a bomb calorimeter with a calorimeter constant of 18.5 kJ/C. If the calorimeter increases in temperature from 17.89 to 29.49 °C, what is the value of q (in kJ) for the combustion reaction. Include the correct sign with your value.

A system undergoes a process consisting of the following two steps: Step 1. The system absorbs 57 J of heat while 94 J of work is done on it Step 2. The system releases 57 J of heat while performing 59 J of work. Calculate ΔE for the overall process

A sample of neon gas at a pressure of 920 mm Hg and a temperature of 55 °C, occupies a volume of 8.27 liters. If the gas is cooled at constant pressure to a temperature of 11 °C, the volume of the gas sample will be __ L.

What is the net ionic equation for the reaction between aqueous solutions of Cr(NO3)3 and Na3PO4? Na+ (aq) + NO3(aq) → NaNO3(s) Cr³+ (aq) + PO4³(aq) → CrPO4(s) Cr³+ (aq) + PO4³(aq) → CrPO4(aq) Cr(NO3)3(aq) + Na3PO4(aq) → CrPO4(s) + 3 NaNO3(aq) Na (aq) + NO3(aq) → NaNO3(aq)

A sample of krypton gas at a pressure of 0.868 atm and a temperature of 27.0 °C, occupies a volume of 786 mL. If the gas is compressed at constant temperature until its pressure is 1.33 atm, the volume of the gas sample will be ___ mL.

A 3.11 gram sample of neon gas has a volume of 900 milliliters at a pressure of 3.07 atm. The temperature of the Ne gas sample is ___ °C.

A 7.50 mL aliquot of a 0.33 M HCI solution is diluted to a final volume of 50.00 mL. What is the molarity of this first dilution solution? Then a second dilution was made by taking 4.00 mL of the first dilution and diluting it to 25.00 mL. What is the molarity of this second dilution? Select one: 1st Dilution = 0.0220 M; 2nd Dilution = 3.52 x 10-3 M 1st Dilution = 0.0660 M; 2nd Dilution = 1.06 x 10-2 M 1st Dilution = 0.0202 M; 2nd Dilution = 4.95 x 10-3 M 1st Dilution = 0.0495 M; 2nd Dilution = 7.92 x 10-3 M

0.20 mol A, 0.60 mol B, and 0.75 mol C are reacted according to the following reaction A + 2B + 3C->2D + E Identify the limiting reactant(s) in this scenario. B and C only C only A only B only A, B, and C

Electron configurations are a shorthand form of an orbital diagram, describing which orbitals are occupied for a given element. For example, 1s²2s²2p¹ is the electron configuration of boron. Enter the complete electron configuration for arsenic (As). Express your answer in complete form in the order of orbital filling as a string without blank space between orbitals. For example, 1s22s2 should be entered as 1s^22s^2.

A sample of oxygen gas occupies a volume of 7.10 L at 62.0°C and 363 torr. If the volume of the gas sample is increased to 8.22 L, while its temperature is increased to 131.0°C, the resulting gas pressure will be

Calculate the mass percent of a vinegar solution with a total mass of 96.82 g that contains 2.34 g of acetic acid

Heeded for this question. When the following skeletal equation is balanced under acidic conditions, what are the coefficients of the species shown? H3ASO3 + CIO3 - ---> H3ASO4+ CIO₂ Water appears in the balanced equation as a (reactant, product, neither) with a coefficient of _. (Enter 0 for neither.) Which species is the oxidizing agent?

When the following half reaction is balanced under basic conditions, what are the coefficients of the species shown? NiO₂ + H₂O ---> Ni(OH)₂ + OH- In the above half reaction, the oxidation state of nickel changes from _ to _

Consider the following two cases: Case 1: 1 g of carbon + 1.33 g of oxygen = 1 mole of carbon monoxide Case 2: 1 g of carbon + 2.66 g of oxygen = 1 mole of carbon dioxide Why is that in the second case when we doubled the amount of oxygen we don't get double the amount of carbon monoxide and instead we make one mole of CO₂? To form one mole of CO2, we need to (keep/double) the C amount and you need to (keep/double) the amount of Owith respect to the amount of C and O in CO. To form two moles of CO, we need to (keep/double) the C amount and you need to (keep/double) the amount of O.

A chemist must dilute 91.4 mL of 445. mM aqueous potassium dichromate (K₂Cr₂O7) solution until the concentration falls to 57.0 mM . She'll do this by adding distilled water to the solution until it reaches a certain final volume. Calculate this final volume, in liters. Round your answer to 3 significant digits.

Calculate the volume in liters of a 0.12M barium chlorate solution that contains 425. mmol of barium chlorate (Ba(CIO3)₂). Round your answer to 2 significant digits.

Identify the true statements about the magnetism of rocks on the sea floor. (Check all that apply.) Rocks contain tiny magnetic particles. Rocks that have cooled down change their orientation when the magnetic field changes. The rocks act like tiny compasses and always point north despite the direction of Earth's field. The orientation of Earth's magnetic field can be determined at the time the rocks cooled.

Give the electron configurations for P and Pb using the short-hand, noble gas method. For example, the electron configuration 1s22s22p63s23p2 (for silicon) is [Ne]3s²3p²

This is the chemical formula for nickel tetracarbonyl (a powerfully poisonous liquid used in nickel refining): Ni(CO)4 A chemical engineer has determined by measurements that there are 4.277 moles of carbon in a sample of nickel tetracarbonyl. How many moles of oxygen are in the sample? Round your answer to 4 significant digits.

A solution containing 1.63 g of barium chloride is added to a solution containing 2.40 g of sodium chromate (chromate ion, CrO2). Determine which reactant is in excess. Find the number of grams of barium chromate that can precipitate.

strong electrolyte weak electrolyte nonelectrolyte A 20 mL solution containing 2 mmol of HBr(g) was integrated into to a circuit that powers a light bulb. When the power supply was turned on, the light bulb produced a bright glow. HBr (g) is a A 20 mL solution containing 2 mmol of C12H22O11 (aq) was integrated into to a circuit that powers a light bulb. When the power supply was turned on, the light bulb remained off. C12H22O11 (aq) is a A 20 mL solution containing 2 mmol of Ca3(PO4)2 (s) was integrated into to a circuit that powers a light bulb. When the power supply was turned on, the light bulb faintly flickered. Ca3(PO4)2 (s) is a A 20 mL solution containing 2 mmol of CH3NH₂(1) was integrated into to a circuit that powers a light bulb. When the power supply was turned on, the light bulb produced a dim glow. CH3NH₂(l) is a