Hello class,\u00a0
Just posting my questions, going to work on them later. <\/p>\n
Ch. 7 Question 49 <\/p>\n
Silver is often extracted from ores such as K[Ag(CN)2] and then recovered by the reaction
2K[Ag(CN)2] (aq) Zn(s)\u00a0\u27f6\u00a02Ag(s) Zn(CN)2(aq) 2KCN(aq)
\u00a0
(a) How many molecules of Zn(CN)2\u00a0\u00a0are produced by the reaction of 35.27 g of K[Ag(CN)2]?
First, I need to make sure that my equation is balanced and thankfully it is already balanced because balancing is kind of frustrating.
Next, the first question is asking for the molecules of Zn(CN)2\u00a0(Zinc Cyanide).
Molar mass of K[Ag(CN)2] is 199g (which I calculated from the periodic table).
I have 1 mol of Zn(CN)2\u00a0and 2 mol of the ore K[Ag(CN)2] so the ratio will be 1:2.
Also, since I need to find moles, I will use Avogadro\u2019s number here.
I plugged in everything in stoichiometric factor:
35.27\u00a0K[Ag(CN)2x1mol199g\u00a0K[Ag(CN)2x1mol\u00a0Zn(CN)22mol\u00a0K[Ag(CN)2×6.022x10231mol
The answer I got was 0.5337 but I need to move my decimal over since my number needs to begin with a 1-9 so it’ll be 5.337 and since I moved the decimal to the right one time I take away one from 1023\u00a0to become 1022\u00a0
=\u00a05.337×1022\u00a0Molecules of Zn(CN)2 <\/p>\n
(b) What mass of Zn(CN)2\u00a0is produced?
I calculated the mol of Zn(CN)2\u00a0(by calculating the equation without Avogadro’s number)
35.27g\u00a0K[Ag(Cn)2\u00a0x1mol199g\u00a0K[Ag(CN)2x1mol\u00a0Zn(CN)22mol\u00a0K[Ag(CN)2=0.0886mol\u00a0Zn(CN)2
I used the periodic table to calculate the molar mass of Zinc Cyanide = 117.42g.\u00a0
I multiply the mol by the molar mass: 0.0886 x 117.42g to get
=\u00a010.40g production of Zn(CN)2 <\/p>\n
Ch. 9 Question 53
\u00a0
Homes may be heated by pumping hot water through radiators. What mass of water will provide the same amount of heat when cooled from 95.0 to 35.0 \u00b0C, as the heat provided when 100 g of steam is cooled from 110 \u00b0C to 100 \u00b0C.
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Hello class,\u00a0 Just posting my questions, going to work on them later. Ch. 7 Question 49 Silver is often extracted from ores such as K[Ag(CN)2] and then recovered by the reaction 2K[Ag(CN)2] (aq) Zn(s)\u00a0\u27f6\u00a02Ag(s) Zn(CN)2(aq) 2KCN(aq) \u00a0 (a) How many molecules of Zn(CN)2\u00a0\u00a0are produced by the reaction of 35.27 g of K[Ag(CN)2]? First, I need […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[35],"class_list":["post-12454","post","type-post","status-publish","format-standard","hentry","category-research-paper-writing","tag-chemistry"],"_links":{"self":[{"href":"https:\/\/papersspot.com\/blog\/wp-json\/wp\/v2\/posts\/12454","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/papersspot.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/papersspot.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/papersspot.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/papersspot.com\/blog\/wp-json\/wp\/v2\/comments?post=12454"}],"version-history":[{"count":0,"href":"https:\/\/papersspot.com\/blog\/wp-json\/wp\/v2\/posts\/12454\/revisions"}],"wp:attachment":[{"href":"https:\/\/papersspot.com\/blog\/wp-json\/wp\/v2\/media?parent=12454"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/papersspot.com\/blog\/wp-json\/wp\/v2\/categories?post=12454"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/papersspot.com\/blog\/wp-json\/wp\/v2\/tags?post=12454"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}