Answer:
Explanation:
(a) Balanced equation
2Zn + O₂ ⟶ 2ZnO
(b). Calculation
You want to convert moles of ZnO to moles of Zn
The molar ratio is 2 mol Zn:2 mol ZnO
I believe its n= m/M
n - number of moles
m - mass of substance
M - molar mass of substance
Answer:
The mass of ammonia (NH3) that contains 
hydrogen atoms is 
g.
Explanation:
As 
atoms of hydrogen = 1 mole of the hydrogen atom
Therefore, 
atoms of hydrogen 
moles of the hydrogen atom.
Now, there are 3 moles of hydrogen atoms in 1 mole of ammonia 
.
As the mass of 1 mole of ammonia is 17g, so
when there are 3 moles of hydrogen atoms, then the mass of ammonia = 17 g
Therefore, when there are 
moles of hydrogen atoms, then the mass of ammonia 
g.
Hence, the mass of ammonia that contains hydrogen atoms is g.
Answer:
Most likely A. Molten lava, since it straight up melts the equipment which is much faster than chemicals dissolving the equipment like hydrochloric acid and nitric acid.
Explanation:
Hope this helped!
P.S. Sure, why not?
Answer:
2.57 x 10⁴ ions
Explanation:
Data Given:
no. of moles of ammonium (NH₄) = 4.26 moles
no. of ions of ammonium (NH₄) = ?
Solution:
formula will be used
no. of moles = no. of ions/ Avogadro's number
As we have to find number of ions so rearrange the above formula
no. of ions = no. of moles x Avogadro's number ...........(1)
where
Avogadro's number = 6.022 x 10²³
Put values in the equation 1
no. of ions = 4.26 mol / 6.022 x 10²³ (ions/mol)
no. of ions = 2.57 x 10⁴ ions
So,
There are 2.57 x 10⁴ ions in 4.26 moles of ammonium
