wdevinier wdevinier

12-07-2017
Chemistry

contestada

. What is the mass, in grams, of a sample of 7.83 × 1024 atoms of helium (He)?

Respuesta :

zrh2sfo zrh2sfo

25-07-2017

moles He = 7.83 x 10^24 / 6.02 x 10^23 =13.0

mass He = 13.0 mol x 4.00 g/mol = 52.0 g

Answer Link

Otras preguntas

Which of the following sets of coefficients correctly balances the following chemical equation? Al(OH)3 Al2O3 + H2O 2; 1; 3 2; 2; 3 3; 1; 2 2; 1; 2

If a president believes that emergency conditions require a quick decision regarding an agreement with another country, which tool allows him to make a decision

What is half of 750

How many moles of carbon do you have in 100 quadrillion carbon atoms? report answer to 2 sig figs

Which of the following statements about John d. Rockefeller is most accurate? a. He invented the concept of vertical integration. b. He drilled the first oil we

The Crusades were fought for the control of several cities and ports, but the main target was ___________.

what does C12 H22 O11 phSO mean

Justice Clarence Thomas believes in Originalism when interpreting the Constitution. Which of the following BEST describes his interpretation of the Constitution

Which of the following should you ask yourself when analyzing word choice?1:Are some available details omitted, and if so, why?2:Does the way in which the autho

Which of the following is not a characteristic of the amniotic sac? A.keeps the embryo from drying out B.maintains a constant temperature C.cushions and protect