tiny1400 tiny1400

04-01-2016
Chemistry

contestada

what is the mass of 9.0 x 10^17 molecules of He gas at STP

Respuesta :

Billymkhoi Billymkhoi

04-01-2016

(9.0*10^17 He molecules)* (1 mol He/ (6.02*10^23 He molecules))= 1.5*10^(-6) mol He.

1.5*10^(-6) mol He* (4.00 g He/ 1 mol He)= 6.0*10^(-6) g He.

The mass of 9.0*10^17 He molecules at STP is 6.0*10^(-6) g He~

Answer Link

Otras preguntas

fine the difference (2ab-5a-7)-(-5ab-7)

convert 11.42424242 to a rational expression in the form of a over b where b aproximatly equals 0

In the number 14,685,000,000, the digit 8 is in what place

What are the names of the different kinds of power held by governments in the United States? A. Concurrent powers B. Reserved powers C. Delegated power

Which of the following best describes how the photosynthesis in grass cells is related to the cellular respiration in a cow's cells? (2 points) A. The carbon d

What did the ideas of john locke, baron de montesquieu, and jean jacques rousseau have in common?

if you have a 100 in a class, then you take an exam thats 30% of you grade, and get a um 70? what would your grade be?

Reasons why the battle of midway was a turning point

What warning does the friar give to romeo in act ii, scene vi, lines 10-15?

Which of these is the best method to solve the water crisis in a location because of long periods of drought? remove plants to increase rainfall reuse water l