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Chapter 3: Q63E (page 83)

The reaction of an element X with element Y is represented in the following diagram. Which ofthe equations best describes this reaction?

a. 3X + 8Y → X3Y8
b. 3X + 6Y → X3Y6
c. X + 2Y → XY2
d. 3X + 8Y → 3XY2 + 2Y

Short Answer

Expert verified

Equation C is the correct option X + 2Y → XY2

Step by step solution

01

Representation of orange circles

To count an orange and black circles number, the representation of orange circle is X and black circle represents Y. The black circle number is 8(8Y) and orange circle number is 3(3X). The Y number which reacts with X can be denoted as,

8-2=6Yatom

02

Representation of chemical equation

The product’s number is 3. The formula of the product is XY2. The chemical equation can be expressed as,

6Y+3X→3XY2

The balanced equation coefficient should be smallest integers.

2Y+X→XY2

These equation cannot describe equation since wrong formula for product. Excess reactant cannot written as balanced equation d is not a best one. Equation C is correct one.

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Most popular questions from this chapter

Nitric acid is produced commercially by the Ostwald process. The three steps of the Ostwaldprocess are shown in the following equations:
4NH3(g)+5O2(g)→4NO(g)+6H2O(g)

2NO(g)+O2(g)→2NO2(g)

3NO2(g)+H2O(l)→2HNO3(aq)+NO(g)


What mass ofNH3must be used to produce1.0×106kgofHNO3by the Ostwald process, assumingyield in each reaction and assuming theNOproduced in the third stage is notrecycled?

Give the balanced equation for each of the following chemical reactions

a.GlucoseC6H12O6reacts with oxygen gas to produce gaseous carbon dioxide and water vapour.

b. Solid ironIII sulfide reacts with gaseous hydrogen chloride to form solid ironIII chloride and hydrogen sulfide gas.

c. Carbon disulfide liquid reacts with ammonia gas to produce hydrogen sulphide gas and solid ammonium thiocyanateNH4SCN .

Question: The element silver (Ag) has two naturally occurring Isotopes 109Ag. and with a mass of 109.905u. Silver consists of 51.82% and has an average atomic mass of 107Ag107.868u. Calculate the mass of 109Ag.

A gas contains a mixture of NH3gand N2H4g,both of which react withrole="math" localid="1650344995587" O2gto formNO2gandH2Og.The gaseous mixture (with an initial mass of 61.00 g) is reacted with 10.00 molesO2, and after the reaction is complete, 4.062 moles ofO2remains. Calculate the mass percent ofN2H4gin the original gaseous mixture.

What information do we get from a formula? From an equation?
See all solutions

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