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

A delegation of authority: a. specifies the incident action plan to be implemented by the incident commander b. relieves the granting authority of the ultimat

What is ONE difference between one of the laws of Hammurabi and one of the laws of The Ten Commandments?

Which of the following is NOT an anxiety disorder? A. social anxiety disorder B. post-traumatic stress disorder C. obsessive-compulsive disorder D. partial s

jenny purchased a prepaid phone card for $30 . long distance calls cost 24 cents a minute using this card. jenny used her card only once to make a long distance

Which of the following would be carried by suspension? clay large rocks small pebbles silt sand

Can some me pleases answer. There is only one problem. There is a picture. Thank you!

If the expected gains on stocks rise, while the expected returns on bonds do not change, then (points : 1) the demand curve for bonds will shift to the right. t

According to the jo-hari window, what is the information we choose to reveal to the receiver? a. common knowledge b. open communication c. feedback d. share

The purpose of a battery in a circuit is to _____.

Which country sent warships to take over new Netherland in 1664