kymcar97
kymcar97
14-09-2016
Chemistry
contestada
How many atoms are in 121 g of calcium?
Respuesta :
Willchemistry
Willchemistry
14-09-2016
Atomic mass Ca = 40.078 u.m.a
40.078 g --------------- 6.02x10²³ atoms
121 g ------------------- ??
121 x ( 6.02x10²³) / 40.078 =
7.28x10²⁵ / 40.078 =
1.81x10²⁴ atoms
Answer Link
VER TODAS LAS RESPUESTAS ( 82+ )
Otras preguntas
Lim [(1/x-1)-(2/x^2-1)], x->1 Right answer is 1/2
For what political and economic reasons did the Italians turn to Mussolini?
Which is true about supporting details? a. Questionable details provide the strongest support for an author’s main idea. b. Irrelevant details are unrelated t
Which sentence is punctuated correctly? a. In first-period biology class we learned that, the ecosystem, is a fragile and sensitive thing. b. The freshmen, we
Solve 4(x + 1) = 4x + 4. Would it be No solution? Or all real numbers?
what is production possibility curve?
If the dimensions of a parallelogram are doubled, the perimeter will also be doubled. True False
A store sells notebooks for $3 each and does not charge sales tax. If x represents the number of notebooks Adele buys and y represents the total cost of the not
why is blood considered to be a suspension?
PLZ HELP!!! Select all that apply Which of the following triangles are possible to draw? A triangle with angle measures of 30°, 60°, and 90°. A triangle with an
