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

Tenley made a square frame for her painting. she used 4 pieces of wood that were each 2.75 feet long. How much wood did Tenley use in all to make the frame

How do the orbits of a comet and earth compare?

The Silver Town people went to a fancy restaurant after the big event. Grammy gave the server a $15 tip. If the tip was 20% of the cost of dinner, how much was

If a swimmer swims for 35.78 seconds t hen how do you estimate it?

When taking a portrait of someone, professional photographers may use what to eliminate distracting backgrounds?

Which of the following most accurately describes the risks associated with sociobehavioral research? A. Less serious and more frequent than physical harms B. Sh

What is the equation of the graphed line? (in slope-intercept form)

Can you please help me with a. b. And c. All three

Which fact provides the BEST evidence to support the conclusion that Tomochichi played an instrumental role in the establishment of the Georgia colony?

16=-5+7 over 4 solve for z