Chynna11 Chynna11
  • 25-02-2016
  • Chemistry
contestada

How many grams of calcium hydride are needed to form 4.550 g of hydrogen gas?

Respuesta :

Willchemistry
Willchemistry Willchemistry
  • 25-02-2016
Molar mass

CaH₂ = 42.0 g/mol

H₂ = 2.0 g/mol

Balanced chemical equation :

CaH2 + 2 H₂O = Ca(OH)₂ + 2 H₂

42.0 g CaH₂ ---------------------  4.0 g H2
    ? g CaH₂ ---------------------- 4.550 g H2

mass = 4.550 * 42.0 / 4

mass = 191,1 / 4

mass = 47.775 g of CaH₂

hope this helps!

Answer Link

Otras preguntas

What are examples of devices that use electromagnetic waves? Check all that apply. -FM radios -microwaves =TV remote controls
Find the expected value of the winnings from a game that has the following payout probability distribution: Skip Payout ($) 1 2 5 8 10 Probability 0.35 0.2 0.1
Evaluate the coefficient of x^5 and x^4 in the binomial expansion of (x/3-3)^7. Hence find the coefficient of x^5 in (x/3-3)^7(x-6)
| 2n+2g = 5 3x + 3y = 7 How many solutions does the system of equations above have?
Examples of RNA viruses are Cvid19 or the virus that causes
What's one thing that can instantly make your day better?​
Find the expected value of the winnings from a game that has the following payout probability distribution: Skip Payout ($) 1 2 5 8 10 Probability 0.35 0.2 0.1
Please write 4-5 sentences about what you see in this image.
How were the three colonial regions similar and different?
Please help !!! Will give you the brainliest !!