A) mass / volume = density
m/6.00cm3 = 13.5939g/cm3
m = 13.5939g/cm3 • 6.00cm3
m = 81.6g
B) mass / volume = density
m/25.0cm3 = 0.702g/cm3
m = 0.702cm3 • 25.0g/cm3
m = 17.6g
1mL = 1cm3
Grinding pepper. It is still pepper.
I hope this helps!
Answer:
The balanced equation would be
2Na(s) + 2H2O(l) ===> 2NaOH(aq) + H2(g)
where
s---solid
l--- liquid
aq--- aqueous
g---- gas
Are the states of each substance
Answer:
0.06457g of H₂
Explanation:
2Al(s) + 6H₂O(l) + 2KOH(aq) → 2K[Al(OH)₄](aq) + 3H₂(g)
Based on the equation 2 moles of Al produce 3 moles of hydrogen.
First, we need to convert mass of Al to moles and then with the chemical equation find moles and mass of hydrogen:
<em>Moles Al (Molar mass: 26.982g/mol):</em>
1.15g Al * (1mol / 26.982g) = 0.04262 moles Al
<em>Moles H₂:</em>
0.04262 moles Al * (3 moles H₂ / 2 mol Al) = 0.06393 moles H₂
<em>Mass hydrogen (Molar mass: 1.01g/mol):</em>
0.06393 moles H₂ * (1.01g/mol) =
<h3>0.06457g of H₂</h3>
