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

Why did the British impose new taxes on the colonists? How did the colonists respond to these new taxes?

Which sentence best describes greek sculpture created during the classical period?

What did the colonists do to show their displeasure with england's actions?

Joseph has started completing the square on the equation 3x2 - 7x + 12 = 0. He has worked to the point where he has the expression x2 - 7/4x = -4. Use complete

In benzodiazepine addiction treatment, what is the correct protocol for tapering a patient off a 3mg per day alprazolam habit?

What kind of imagery did Jonathan Edwards use in his sermons and to what effect?

The science department buys the equipment shown in the table.They bought all three items this year.In how many years will they have to buy all three items again

Choose the statement from the following choices that best describes the separation of powers. A. Powers and duties of the United States government are chose

Suppose you want to find out which dog food your dog likes best. Write about the experiment you would design. What variables do you need to control? How would y

challenges in sahel plz I really need help.