dndkns
dndkns
24-05-2014
Chemistry
contestada
How many atoms are there in 90.2 grams of selenium?
Respuesta :
Sabrina211
Sabrina211
25-05-2014
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
VER TODAS LAS RESPUESTAS ( 43+ )
Otras preguntas
An arrow is shot from a bow at an angle of 35 degrees above horizontal with an initial speed of 50 m/s what is the arrows horizontal x and y components ?
which idea is central to John Locke's Two Treatises of Government?
What was the key issue in the process of ratifying the Constitution?
Research has shown a link between cancer and which sexually transmitted disease
Explain the Catholic Church’s response to the Protestant Reformation by describing the outcomes of the Council of Trent.
A healthcare provider prescribes thigh-high antiembolism stockings for a client with varicose veins. the client's thighs are heavier than the lower legs, and th
Graph this function f(x)=x^2-4x-5
Hey i could really use some help A cone has a volume of 27 pi centimeters cubed and a radius of 3 centimeters What is the height of the cone. Thanks_sincerely
Read the sample dictionary entry for the word mood. mood /mo͞od/ noun: mood 1. a feeling or state of mind --an upset or angry state of mind 2. the fee
Quick!!!Geoffrey buys 48 shares of Ignyta, Inc. (RXDX) at $6.15 each, and his broker charges him a commission of $81. How much did Geoffrey pay for his stock?A.
