If 156 grams of chromium react with an excess of oxygen, as shown in the balanced chemical equation below, how many grams of chromium oxide can be formed? (1 point) 4Cr + 3O2 yields 2Cr2O3

Answers

Answer 1

Answer:

=759.95 grams.

Explanation:

The molar mass of chromium is 51.9961 g/mol

Therefore the number of moles of chromium in 156 grams is:

Number of moles =mass/RAM

=156g/51.9961g/mol

=3 moles.

From the equation provided, 3 moles of chromium metal produce 2 moles of Chromium oxide.

Therefore 3 moles of chromium produce:

(3×2)/4 moles =1.5 moles of chromium oxide.

I mole of chromium oxide has a mass of 151.99 g

Thus 1.5 moles= 1.5mole ×151.99 g/mol

=759.95 grams.


Related Questions

How long would it take a typical jet to travel the sun from earth?

Answers

Answer:

To travel this far, it would take 19 years.

NF3 has three F atoms bonded to a central N atom, with one lone electron
pair on the N. What is the shape of this molecule?
O
A. Tetrahedral
O
B. Trigonal planar
O
C. Bent
O
D. Trigonal pyramidal

Answers

D Trigonal pyramidal

Explanation:

Final answer:

NF3 exhibits a trigonal pyramidal shape due to its sp³ hybridization, with three bonded fluorine atoms and one lone pair of electrons on the nitrogen atom.

Explanation:

The molecule in question is NF3, which consists of one nitrogen atom (N) and three fluorine atoms (F). The nitrogen atom in NF3 is sp³ hybridized, utilizing one sp³ hybrid orbital to form a bond with each of the three fluorine atoms, and the remaining sp³ hybrid orbital accommodates a lone pair of electrons. Considering the presence of three bonded pairs and one lone pair of electrons on the nitrogen atom, the molecular geometry of NF3 is trigonal pyramidal. This geometric shape resembles a tetrahedron with one vertex missing, due to the presence of the lone electron pair on nitrogen, which slightly distorts the angles between the bonds.

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