Find the number of grams from this...

User Generated

Anohpurf

Science

Description

Calcium hydride reacts with water to form calcium hydroxide and hydrogen gas.

(a) Write a balanced chemical equation for the reaction. (Use the lowest possible coefficients. Include states-of-matter under SATP conditions in your answer.)

(b) How many grams of calcium hydride are needed to form 6.491 g of hydrogen?

User generated content is uploaded by users for the purposes of learning and should be used following Studypool's honor code & terms of service.

Explanation & Answer

Thank you for the opportunity to help you with your question!

a) CaH2(s)+2H2O(l)----Ca(OH)2(s)+2H2(g)

b) Moles of hydrogen gas = 6.491 g/(2*1.008 g/mole H2) = 3.220 moles H2 
Moles of CaH2 = (3.220 moles H2) x (1 mole CaH2/2 moles H2) = 1.61 moles CaH2 
Grams Calcium hydride = 1.61 moles x 42.094 g/mol = 67.77 grams 

Please let me know if you need any clarification. I'm always happy to answer your questions.


Anonymous
Super useful! Studypool never disappoints.

Studypool
4.7
Trustpilot
4.5
Sitejabber
4.4

Related Tags