kiah6749
contestada

How many molecules does 85.0 g HCl contain?
A. 2.04 x 10^24 molecules
B. 1.98 x 10^24 molecules
C. 1.40 x 10^24 molecules
D. 2.54 x 10^24 molecules

Respuesta :

Moles = grams/molar mass
Moles = 85/(1+35.5)
Moles = 2.33

Multiply by agrovados number (6.022 * 10^23) to get

1.401917808219x10^24 molecules

C is the answer

Hope this helped :)

diviz2006

Answer: C. 1.40×10^24

Explanation:

To do this, we must convert this from grams to moles, then from moles to molecules. For the first step, you will need to find the molar mass of HCl on the periodic table, which is 36.461gHCl.

[tex]85.0gHCl*\frac{1molHCl}{36.461gHCl} =2.33molHCl[/tex]

Now that we have the moles, we must convert that to molecules by using Avogadro's number.

[tex]2.33molHCl*\frac{6.022*10^{24} }{1molHCl} =1.40*10^{24}[/tex]

Now we have our answer. The best answer choice here is C. 1.40×10²⁴.

I hope this helps! Pls mark brainliest!! :)

Otras preguntas