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?
2 years ago
Thank you for the opportunity to help you with your question!
b]CaH2+2H and 2H2
40+2= 42 GRAM MES
H= 4 gram mes
Please let me know if you need any clarification. I’m always happy to answer your questions. 2 years ago
6.4919/1.008= 3.22moles of hydrogen used.
For I mole of calcium hydride, 2 moles of hydrogen was formed hence the amount of calcium hydride used in moles is 3.22/2=1.61 moles of calcium hydride.
Hence mass= moles molar mass which is 1.61moles42.094= 67.77g
Hence 67.77g of calcium hydride was used.
This is the answer i got :/