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 ( 16+ )
Otras preguntas
PLEASE ANSWER + BRAINLIEST!! Which expression is equivalent to (3x^2 - 7)? A. (2x^2 - 11) - (x^2 + 4) B. (5x^2 - 6) - (2x^2 - 1) C. (10x^2 - 4) - (7x^2 + 3) D.
"which example best contrasts gerald ford's and jimmy carter's views on foreign policy?"
How many days is 10,080 minutes
An Emotional struggle that takes place in the protagonists mind is called
What country surrendered to germany essentially ending the war on the eastern front? a. britain c. russia b. france d. united states?
In time-out, adam, a disruptive child who wants to stay with his class, is removed from the classroom. this exemplifies:
How did the alliance system in Europe most likely contribute to the start of World War I?
PLEASE HHHHHEEEEEELLLLLLLLLLLLLLLLLPPPPPPPPPPPPPPP!!!!!!!!!!!!!!!!! What is gravity? What is the difference between distance and contact forces? What would be
How were the federalists able to win ratification of the proposed constitution?
What are repealing forces? Please explain with examples and definition
