![mosthatedpicky1](/avatars/13563.jpg)
mosthatedpicky1
05.12.2020 •
Chemistry
How many atoms are in 49.6 g Se?
Solved
Show answers
More tips
- S Science and Technology How to Make a Homemade Smoker: The Ultimate Guide...
- S Society and Politics 10 Tips for Boosting Your Self-Esteem...
- C Computers and Internet How to Create a Folder on Your iPhone?...
- G Goods and services How to sew a ribbon: Tips for beginners...
- F Food and Cooking How to Make Mayonnaise at Home? Secrets of Homemade Mayonnaise...
- C Computers and Internet Which Phone is Best for Internet Surfing?...
- F Food and Cooking Everything You Need to Know About Pasta...
- C Computers and Internet How to Choose a Monitor?...
- H Horoscopes, Magic, Divination Where Did Tarot Cards Come From?...
Answers on questions: Chemistry
- C Chemistry What is the mass of a 7.91cm3 piece of lead having a density of 11.34g/cm3...
- C Chemistry What type of chemical reaction is represented in the following 1) C4H8 + 602 4CO2 + 4H2O 2) HCl + NaOH H2O + NaCl 3) 2KNO3(s) 2KNO2(s) + O2(g) 4) 2Ag + S Ag2S 5) MgCO3(s) MgO(s) +...
- C Chemistry 3. The lithosphere a. is partially molten. b. is brittle. c. behaves plastically. d. can flow....
- C Chemistry Solute molecules dissolve in solvent particle interaction. The particles come close enough to interact through or random motion of one substance through another...
- C Chemistry Two identical coolers are packed for a camping. Each cooler is packed with ten-one liter softdrinks and 1.5 kg of ice. The softdrinks that were packed in cooler A were first put inside...
- C Chemistry A student dissolves 3.9g of aniline (C6H5NH2) in 200.mL of a solvent with a density of 1.05 g/mL . The student notices that the volume of the solvent does not change when the aniline...
- E English Have you ever noticed that the look on a person s face or the movements of a person s body can tell what the person is thinking? body language is the physical expression of thoughts...
- E English Consider the following lines. juliet . . i have no joy of this contract tonight: it is too rash, too unadvis d, too sudden; too like the lightning, which doth cease to be ere one can...
- M Mathematics The sum of two integers is thirty. eight times the smaller integer is 6 more than 5 times the larger interger. find the integers...
- P Physics The frequency of a wave is 200 hz. the wavelength is 0.1 m. what is the period of the wave?...
Ответ:
3.79 ×10²³ atoms
Explanation:
Given data:
Mass of Se = 49.6 g
Number of atoms = ?
Solution:
Formula:
Number of moles = mass/ molar mass
Molar mass of selenium is 78.96 g/mol.
by putting values,
Number of moles = 49.6 g/ 78.96 g/mol.
Number of moles = 0.63 mol
Number of atoms:
Now we will apply Avogadro number.
1 mole contain 6.022×10²³ atoms
0.63 mol × 6.022×10²³ atoms / 1 mol
3.79 ×10²³ atoms
Ответ: