1

answer

0

watching

647

views

12 Dec 2019

The most common source of copper (Cu) is the mineral chalcopyrite (CuFeS2). How many kilograms of chalcopyrite must be mined to obtain 265 g of pure Cu? Express your answer to three significant figures and include the appropriate units.

1

answer

0

watching

647

views

For unlimited access to Homework Help, a Homework+ subscription is required.

You have 0 free answers left.
Get unlimited access to 3.8 million step-by-step answers.

Get unlimited access

Already have an account? Log in

Tod ThielLv2

13 Dec 2019

Unlock all answers

Get 1 free homework help answer.

Already have an account? Log in

Join us on Discord

Chemistry Study Group

Related textbook solutions

Basic Chemistry

ISBN: 9780134138046

Principles of Chemistry Molecular Approach

ISBN: 9780134112831

Principles of Chemistry Molecular Approach

3rd Edition, 2014

ISBN: 9780321971944

Chemistry: Structure and Properties

ISBN: 9780134293936

Chemistry: A Molecular Approach

ISBN: 9780321809247

Chemistry: A Molecular Approach

ISBN: 9780134874371

Principles of Chemistry: A Molecular Approach

ISBN: 9780134895741

Chemistry: The Central Science

14th Edition, 2017

ISBN: 9780134414232

Related questions

Geoguay: "So how much of that super chunk chocolate is scoop of your super chunk chocolate ice cream?" Geogal "Well, in order to tell you I need to take a scoop of the ice cream and drop it on this weighing scale (splat), weigh it. pick out all those chocolate chunks and drop them on another weighing scale (thud), then take the weight of the chunks and divide by the weight of the scoop, multiply by 100 and there you have it: an eye-popping 42 percent (by weight) of super chunk chocolate in my super chunk chocolate ice cream" In lecture we talked about the importance of mineral resources in sustaining our society and that every American consumes about 9 kilograms, or 20 pounds, ofeopper per year. That figure is based on an estimate of the national demand for copper to make such things as electrical wire, tubing, and electronic components (to name just a few) divided by the US. population. Like other metals, the copper you use comes from minerals, which in turn are extracted from earth's crust. Remember from lecture that valuable minerals do not occur in large pockets of pure, solid masses but are widely dispersed throughout earth's crust and mined where geological processes have enriched their concentration. This homework problem will help you appreciate the value of metal in minerals and the volume of rock material that must be processed to meet your annual demand for copper. Back A common "ore" of copper is the mineral chalcopyrite. Chalcopyrite is often the principal ore mineral in "porphyry copper deposits" as presented in class. You have analyzed the physical properties of chalcopyrite in laboratory so you already know some things about it or where to go to refresh your memory. Chalcopyriteis a sulfide mineral so this means it contains more than just copper. In addition to sulfur (S), chalcopyrite contains some iron (Fe) and the proportions of these metals in the mineral are expressed by its chemical formula: CuFeS2. So how much copper (Cu), say by weight percent, is in chalcopyrite? Let's use another copper sulfide mineral as an example ofhow this calculation is made. How much copper is in the mineral chalcocite? Chalcocite is another ore mineral of copper. In order to determine this one needs to know the chemical formula and atomic hts of the included chemical elements. The chemical formula for chalcocite is Cu:S The atomic weight of the chemical elements C and S are 63.55 and 32.07, respectively (this info can be retrieved from a Periodic Ta of the Elements like the one lecture. This means that the chemical formula weight ofchalcocite i 2x63,55 (Cua) 32.07 (S) 159.17 grams (CuzS) and the weight percent of Cu in chalcocite is 127.10 (Cu) divided by 159.17 (Cu2S) x 100 79.85%

Can someone please show me a step by step explanation on how to solve this? The first picture is the information, mainly the (a) section, the second picture is the questions I need answered

What mass of Cu(s) is electroplated by running 30.0 A of current through a Cu2+(aq) solution for 4.00 h?

Express your answer to three significant figures and include the appropriate units.

View Available Hint(s)

nothingnothing

Submit

Part B

How many minutes will it take to electroplate 46.1 g of gold by running 5.00 A of current through a solution of Au+(aq)?

Express your answer to three significant figures and include the appropriate units.

View Available Hint(s)

nothingnothing

Weekly leaderboard

Homework Help 3,900,000

Chemistry 830,000

Start filling in the gaps now

New to OneClass?Sign up