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12 Dec 2019

Given the balanced equation, Zn+2HCl = ZnCl2+H2, how many moles of H2 are formed when 3.5 moles of Zn fully react? (Please be specific, I have a test coming up!)

A. 3.5 moles

B. 7 moles

C. 9 moles

D. 8 moles

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Jamar Ferry
Jamar FerryLv2
13 Dec 2019

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Related questions

Sodium reacts with oxygen to form sodium oxide and has the following balanced chemical equation:

How many mole(s) of oxygen gas (O2) are needed to react with 2.0 moles of Na?

a. 0.5 moles

b. 3.0 moles

c. 1.0 moles

d. 2.0 moles

e. 4.0 moles

Number 1, please show work

Answer the questions in the spaces below: Zn = 65.4; Cl = 35.5; Na = 23.0; O = 16.0; H = 1.0; C = 12.0 amu

1. Balance the equation below then calculate the moles of a) iron metal, and b) carbon monoxide formed from 0.350 moles of Fe2O3: Δ Fe2O3(s) + CO(g) ïƒ Fe(s) + CO2(g) Ans.:

a)

b)

2. Balance the equation below then calculate the mass of ZnCl2 that can be obtained from 10.0 g of zinc metal and an excess of hydrochloric acid: Zn(s) + HCl(aq) ïƒ ZnCl2(aq) + H2(g)and Ans.:

3. A student prepared Na2CO3 by bubbling CO2 through an aqueous solution of NaOH: 2 NaOH(aq) + CO2(g) ïƒ Na2CO3(aq) + H2O(l) If the student obtained 5.60 g of Na2CO3 from 10.3 g of NaOH, what is the % yield in the reaction? Ans.:

Please show all work

Thank you

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