Question 10 of 13 - Ch11 HW

A certain copper ore contains 2.32% of Cu2S by mass, and the remainder of the ore contains no copper. In a particular year, a single open-air smelt furnace heated 37000 tons of this ore. Compute the maximum mass of copper metal that could have been obtained by this process. (Clarification: The tons in this problem are English tons, with 1 ton = 2000 lb. You can answer in g, kg, or lb, but the computer does not understand tons as a unit for the answer.)

Balance the following chemical equation (ifnecessary):C6H6O(I) + O2(g) -> H20 (g) + CO2 (g)

4. A new procedure for the determination of sulfur in coal was tested on a standard coal sample with a certified value of 2.14% sulfur by mass. The new procedure gave results of 2.11%, 2.07%, 2.04%, 2.06%, and 2.16% for five separate determinations.  a) Does the new procedure give the correct result at the 95% confidence level?  b) Does the new procedure give the correct result at the 90% confidence level?

(b) Potassium nitrate was synthesized in an experiment using 10 mL of nitric acid and excess potassium hydroxide. The mass data obtained from the experiment is shown in Table 1 below. Given that the percentage yield of potassium nitrate was 88.3 %, calculate the concentration (% m/v) of the nitric acid used in the experiment. Table 1: Mass data for the synthesis of potassium nitrate from nitric acid and potassium hydroxide Mass of clock glass and crystallized potassium nitrate/ 45.55 Mass of empty clock glass/ g 39.18

Moquie $0 219 OWLV2 keAssignment/takeCovalentActivity.do?locator-assignment-take In the following equation for a chemical reaction, the notation (s), (I), or (g) indicates whether the substance indicated is in the solid, liquid, or gaseous state. 2SO₂(g) + O₂(g) →→→2SO3(g) + energy The reaction is Q Search Identify each of the following as a product or a reactant: SO3(g) SO₂(g) 0₂(g) When the reaction takes place energy is Submit Answer 7 L M te OWLv2 | Online teaching and X * Use the References to access important values if needed for this question. Retry Entire Group K CO 144 www.yo up 8 more group attempts remaining L 11 b Answered: For the reaction 2 x + 111 P g P¹ ins prt sc. delete Previous backspace ^ GG 4 home GURN lock 7 home A 6:52 PM 5/14/2023 74 X In

X VLAScience 7 B- Edgenuity.com X + ! https://e2020.geniussis.com/F n. edgenuity.com/Player/ Chemical Properties Assignment Active Identifying Properties of Matter Determine which type of property each statement describes by typing "physical" or "chemical" in the blank. Hydrogen is a colorless, tasteless, and odorless gas. Hydrogen is very combustible in the presence of oxygen. Hydrogen is very reactive with most elements. Hydrogen is the least dense of all elements. D Intro V Done SUS

please highlight the correct answer

I would need help answering this question with the steps please

Remaining Time! 02:29:4. Consider the balanced chemical equations shown below. When a 6.00 g sample of a mixture of iron (Fe) and aluminum (Al) is treated with excess HCl(aq), 0.177 moles of H2 are obtained. What is the mass percentage of Fe in the original mixture? Choose the closest answer. Fe(s) + 2 HCI(aq) FeCl2(aq) - + H2(g) 2 Al(s) +6 HC((aq) 2 AICI3(aq) + 3 H2(g) 96 % 69 % 47 % 33 % 17 % Rack Question Menu - O O

earson.com/?courseld=1 ← 2 S MISSED THIS? Read Section 4.2 (Page); Watch KCV 4.2, IWE 4.2. W Write a balanced chemical equation for each reaction. म X → #3 E D C C $ 4 R F V % 5 T G B ^ ▾ 6 Part A G Search or type URL Y Aqueous hydrogen chloride reacts with oxygen gas to form chlorine gas and liquid water. Express your answer as a chemical equation. Identify all of the phases in your answer. ² ΑΣΦ H Submit Part B A chemical reaction does not occur for this question. Part C Request Answer Solid iron(III) oxide reacts with hydrogen gas to form solid iron and liquid water. Express your answer as a chemical equation. Identify all of the phases in your answer. Submit Request Answer MacBook Pro ΑΣΦ 4 A chemical reaction does not occur for this question. & 7 N Nitrogen monoxide gas reacts with hydrogen gas to form ammonia gas and water vapor. Express your answer as a chemical equation. Identify all of the phases in your answer. U J ☆ * 00 B 8 M C w ? I ? K ( 9. < O ) - O L P A I' Review I…

Enter a balanced equation for the reaction between aqueous lead(II) nitrite and aqueous sodium bromide to form solid lead (II) bromide and aqueous sodium nitrite. Express your answer as a chemical equation. Identify all of the phases in your answer. | 圈 femplates Symbols undo redo reset keyboard shortcuts help ΑΣΦ . DA chemical reaction does not occur for this question.

The theory that argues that individual investors and financial institutions have specific maturity preferences is called the Multiple Choice liquidity preference theory. market segmentation theory unbiased expectations theory inverted forward theory

Will a ppt of PBCO3 (s) form if you mix 30 mL of 1.3 x 10-8 M Pb(NO3)2 (aq) with 120 mL of 5.7 x 10-6 M Na2CO3 (aq)? (Which of the following is entirely correct?) Q = 7.4 x 1014, no ppt %3D OQ = 7.4 x 10-14, ppt forms 2.5 x 10-9, ppt forms Q = 1.2 x 10-14, ppt forms %3D Q = 1.2 x 1014, no ppt

The refining of aluminum from Bauxite ore (which contains 50.% Al2O3 by mass) proceeds by the overall reaction 2AL2O3 + 3C -> 4Al + 3CO2. How much bauxite ore is required to give 5*1013g of Aluminum produced each year in the United States? (Assume 100% Conversion)  a 1.3*1013gb 5.3*1013gc 1.9*1013gd 7.6*1013g

be sure your answer is correct and have the correct number of significant digits

A teacher developed a new chemical - NONDISTRACTUS, which allows students to focus in the classroom more and not be distracted by random events. For NONDISTRACTUS to be effective there must be a minimum concentration in the student's body of 2.00 x10-3 mol / L. If the concentration falls below this level, the students are faced with a 10 min nonproductive period where they cannot focus on anything. NONDISTRACTUS was found to undergo a very rapid first-order decay with a half-life (t½) in the bodies of students of 23 min. Based on this information:a) What is the rate law constant, k?b) If the student starts off with an initial concentration of 2.25 x 10-2 mol / L dose, how long will it be until the concentration is above the minimum 2.00 x 10-3 mol / L? Will it ensure that they are not distracted for the entire test?

The equation 250/ 96 Cm→?+ 98/38Sr +4 1/0 n is correctly completed as m 250Cm→ 148/59Ce + 98/38 Sr + 4 1/0n.

(Incorrect) An impure sample of hydrocarbon having a total mass of 41.0 g undergoes combustion analysis to generate 82.6 g CO₂(g) and 16.9 g H₂O(g). Assuming that the impurities do not contain carbon or hydrogen, what percentage of the initial sample is the pure hydrocarbon? Provide the numerical value of your response in decimal notation rounded to 3 significant figures. You answered: 4.58 The correct answer is: 59.5%

Using the table provided, what is the enthalpy for the reaction shown below: 6H₂(g) + 4NO(g) + CH₂(g) → CO₂(g) + 2H₂O(l) + 4NH3 (9)

A geochemist measures the concentration of salt dissolved in Lake Parsons and finds a concentration of 69.32 g.L The geochemist also measures the concentration of salt in several nearby non-isolated lakes, and finds an average concentration of 5.02 g⋅L¯¹. Assuming the salt concentration in Lake Parsons before it became isolated was equal to the average salt concentration in nearby non-isolated lakes, calculate the percentage of Lake Parsons which has evaporated since it became isolated. Be sure your answer has the correct number of significant digits.

For parts of the free response question that require calculations, clearly show the method used and the steps involved in arriving at your answers. You must show your work to receive credit for your answer. Examples and equations may be included in your answers where appropriate.   Answer the following questions related to the analysis of CaBr2CaBr2. (a) A student has a 10.0g10.0g sample of CaBr2CaBr2. Show the setup of the calculation to determine the number of moles of CaBr2CaBr2 in the sample. Include units in the setup. (You do not need to do any calculations.)

The hydrated salt, MY3-xH0, was heated strongly in a crucible to remove all the water molecules of crystallization. The data for this experiment are given in the table below. Mass of empty crucible and cover Mass of crucible, cover, and hydrated salt 30.29 g 35.57 g Mass of crucible, cover, and anhydrous salt 34.57 g Molar mass of anhydrous salt 230.99 gimol O Calculate the % composition by mass of water in the hydrated salt O Determine the value of x.