jonrare jonrare

26-09-2016
Chemistry

contestada

How many atoms are in 149 g of calcium?

Respuesta :

Willchemistry Willchemistry

27-09-2016

Atomic mass Calcium => 40.078 u.m.a

40.078 g --------------------- 6.02x10²³ atoms
149 g ------------------------ ?? atoms

149 x ( 6.02x10²³) / 40.078 => 2.23x10²⁴ atoms of Ca

hope this helps!

Answer Link

Otras preguntas

Which compromise between the Church and the Holy Roman Empire resulted from the Concordat of Worms?

What is the total surface area of a cuboid with length 16cm, width 8cm and height 6cm?

A silicon solar cell behaves like a battery with a 0.46 V terminal voltage. Suppose that 1.0 W of light of wavelength 620 nm falls on a solar cell and that 50%%

(Plz help +30) Which of the following details should be included in an objective summary of the play? Select two. A. the cause of the stain on the hand-bag B. t

solve for x 4= tx gh= 7x 2d + x = w

I need help ASAP pleasee

please give me correct answer

If the State of California raised the average state consumer sales tax rate from 9.25 percent to 15 percent, then this sales tax will have its heavist impact on

Tiana would like to buy ice cream cones for her birthday party, but since she does not have very much ice cream, she wants cones with the smallest volume. Which

hi please answer the truths IS IS OKAY TO BE BAD AT WORDS PROBLEMS?!cuz I'm in middle school and I'm very bad at word problems..I can't even solve percentage, p