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

How did the Scramble for Africa affect African countries even after European imperialism in the region had ended? A. It continued to reduce Africa's population

Como puedo poner foto a mi perfil de brainly decimeloooo pliiiis

Evaluate. Write your answer as a fraction or mixed number in simplest form.

______________ are chemicals in the body affecting how you feel. A. Hormones B. Emotions C. Calories D. Memories

Evaluate (-315) ×4 with the correct explaination

LORD OF THE FLIES QUESTION..... what is ralph's style of leadership??

help me with this math problem, please

Measuring the height of a tree is usually more difficult than measuring the diameter of the tree. Therefore, many researchers use regression models to predict t

which of the following often negatively affect an individual's thought processes

Question 12 of 15 In what region of the United States were totem poles common forms of Native American art? A. The Northeast B. The Great Plains C. The Southwes