Answer:
Mass of sodium react = 8.63 g
Explanation:
Given data:
Mass of sodium hydroxide produced = 15 g
Mass of sodium react = ?
Solution:
Chemical equation:
2Na + 2H₂O → H₂ + 2NaOH
Number of moles of sodium hydroxide:
Number of moles = mass/ molar mass
Number of moles = 15 g/ 40 g/mol
Number of moles = 0.375 mol
Now we will compare the moles of Sodium and sodium hydroxide.
NaOH : Na
2 : 2
0.375 : 0.375
Mass of Sodium:
Mass = number of moles × molar mass
Mass = 0.375 mol× 23 g/mol
Mass = 8.63 g
Answer:
=759.95 grams.
Explanation:
The molar mass of chromium is 51.9961 g/mol
Therefore the number of moles of chromium in 156 grams is:
Number of moles =mass/RAM
=156g/51.9961g/mol
=3 moles.
From the equation provided, 3 moles of chromium metal produce 2 moles of Chromium oxide.
Therefore 3 moles of chromium produce:
(3×2)/4 moles =1.5 moles of chromium oxide.
I mole of chromium oxide has a mass of 151.99 g
Thus 1.5 moles= 1.5mole ×151.99 g/mol
=759.95 grams.
Explanation:
A prime illustration of sour salad dressing formulas and suspension. Vinegar is also an acetic acid product which is dispersed in water, so we can't even see molecules in the oil. The removal throughout the liquid phase to make a solution.