dndkns
dndkns
24-05-2014
Chemistry
Answered
How many atoms are there in 90.2 grams of selenium?
Answer :
Sabrina211
Sabrina211
24-05-2014
First calculate the moles of selenium by multiplying the mass x molar mass
90.2 × 78.96 = 7122.2 moles
Number of moles multiplied by avogadros number gives number of atoms
7122.2 × 6.022 × 10^{23} = 4.289×10^{27} atoms
Answer Link
VIEW ALL ANSWERS ( 91+ )
Other Questions
During the Reconstruction period in the South, elections were held in every former Confederate state in order to rebuild the state governments. Which of the fol
what is 293 divided by 6
Which statement best describes President Andrew Johnson's overall approach to Reconstruction? -He wanted to ensure that there were strong protections for Africa
Describe the working and living conditions that working-class people experienced during the Industrial Revolution.
Albert photograph has an area of 80 square inches the length of the photo is 1 1/4 the width which of the following to be the dimensions of the photograph
Which words in the sentence make up the adverb phrase? Which word does it modify? Dad found the extra trunk key in the morning. A. in the morning; modifies foun
In a food chain, which trophic level contains the greatest amount of energy? A. herbivores B. carnivores C. producers D. decomposers
What do the Indian rulers Babur, Akbar, and Shah Jahan have in common? A.They were all rulers during the Mogul Dynasty. B.They all gained power by conquest. C.T
Identify the type of clause or phrase in the sentence below. It is necessary to be aware of one's surroundings when living in such close proximity to the desert
Which pronoun best completes the sentence? How is the pronoun used? Are Mei-Ling and __________ singing together today? A. us; subject B. we; subject C. we; pre