08-04_task1-2

CHM 151 Exp #8 Copper Cycle General Observations: Your instructor has provided pictures and video taken during each of the five different steps (reactions) during this experiment. Please refer to them as you write out your general observations for the experiment. For example: Table 1- General Observations of the Copper Reactions in this experiment Step 1: Cu(s) + 4HNO;(aq) → Cu(NO3);(aq) + 2NO:(g) + 2H;O() Reddish brown gas is produced and the copper dissolves to form a blue solution. The reaction is producing heat (beaker is getting hotter). Since there are five steps in this series there should be general observations written down for each reaction (step) in the series (5). It is important to record observations of color, gas production, precipitate production, dissolving of solids and changes of temperature since these types of general observations are all indicators of a chemical reaction taking place. You will find numbers written in parentheses for the questions placed in the…

A Styrofoam cup was analyzed in a lab and found to contain 92% by mass carbon. How much carbon can be found in a stack of polystyrene cups with a total mass of 569 grams? 0618 grams 520 grams O456 grams 535 grams 575 grams

How can we find the percentage? And the produced?

Your Answers: Assess It! 4. As we look around space we find that most of it is composed of (4). hydrogen combines with carbon which is the basis for all living things. Combining different (6). A group of two or more atoms that are bonded together is called a (7). are combined in a specific way, or ratio, the substance is called a (8). of hydrogen. When the forms a (5)_ 7. together form different substances. 8. _. And when the elements (e.g. water). DELL 5. 6.

Please help me solve this question, i have trouble figuring it out, explain and make sure its 1000% correct thank you sm

7. A natural gas sample was analyzed to contain 84% (by volume) CH4, 10% C2H6, 3% C3H8, and 3% N₂. If a series of catalytic reactions could be used for converting all the carbon atoms into butadiene, C4H6, with 100% efficiency, how much butadiene could be prepared from 100 g of the natural gas? Note: Volume percent of a gas mixture is nn mala normant the O 1530 g 82 g O 28 g 3150 g

Complete the blanks.

12. Use the following equations to answer the next four questions: i. H2O(s) → H,O(1) Water ii. Na (aq) + Cl (aq) + Ag*(aq) + NO3 (aq) AgCl(s) + Na*(aq) + NO3 (aq) ii. CH3 OH(g) + O2(g) → CO2 (g) + H,O(g) -> iv. 2H,0(1) → 2H2(g) + O2(g) -> v. H* (aq) + OH (aq) H20(1) (a) Which equation describes a physical change? (b) Which equation identifies the reactants and products of a combustion reaction? (c) Which equation is not balanced? (d) Which is a net ionic equation?

Use the following information to answer this question. 2Al) + 3CuCl2(aq)→ 2AICI3(aq) + 3Cu(s) (word equation: aluminum plus three copper(Il) chloride produce two aluminum chloride and three copper) Which of the following best describes what is occurring during this reaction? Select one: O a. Aluminum replaces chlorine in the compound. O b. Aluminum replaces copper in the compound. O c. Copper replaces aluminum in the compound. O d. Chlorine replaces copper in the compound. Smoke Signal.pdf EFiles (1).zip Chap6 SF10 (1).pdf

The US uses about 21 million barrels of oil per day. The world used about 86 million barrels of oil per day. Calculate how many kg and L of CO2 are produced in the world each day from gasoline. (Neglect all natural gas, coal and biofuels burned and any energy used to process long chains into shorter chain hydrocarbons) (1 barrel = 42 gallons).

To which one of the following reactions represents the formation of HNO3(1)? OA. HNO3(1)→ H(g) + N(g) + 30(g) O B. H(g) + N(g) + O3(g) → HNO3(1) O C. H2(g) + N2(g) + O3(g) → HNO3(1) O D. H2(g) + N2(g) + 302(g) → 2HNO3(1) O E. 1/2H2(g) + 1/2N2(g) + 3/2O2(g) → HNO3(1)

At elevated temperatures, NaHCO3 is converted quantitatively to Na2CO3:

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