NaH(s)+ H2O (l)=>NaOH(aq)+H2(g)
You want to calculate the mass of NaH, I assume. Otherwise, the question isn't clear. It simply says calculate the mass(??)
So, calculate the moles of H2 gas that satisfy the conditions of 982 ml at 28ºC and 765 torr. But you must subtract the vapor pressure of water at 28º to get the actual pressure of the H2 gas. So, the actual conditions are 982 ml (0.982 L) and 301 K and 765-28 = 737 torr.
PV = nRT
n = PV/RT = (737 torr)(0.982 L)/(62.4 L-torr/Kmol)(301 K)
n = 0.0385 moles H2
moles NaH needed = 0.0385 moles H2 x 1 mole NaH/mole H2 = 0.0385 moles NaH required
mass of NaH needed = 0.0385 moles x 24 g/mole = 0.925 g NaH
Brainliest Please :)
In ionic bonding, atoms transfer electrons to each other. Ionic bonds require at least one electron donor and one electron acceptor.
48 square unit
Explanation:
Given parameters:
Surface area of sphere = 4πr²
value of π = 3
radius of sphere = 2
Unknown:
Surface area of sphere = ?
Solution:
To solve we input the given parameters in the formula for the surface area of the sphere.
S. A = 4πr²
r is the radius of the sphere
π is a constant whose value is 3
S.A = 4 x 3 x 2² = 48 square unit
learn more:
Volume of a sphere brainly.com/question/5055270
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