<span>In a polar covalent bond, the electrons shared by the atoms spend a greater amount of time, on the average, closer to the nucleus of one atom than the other.</span>
Answer:
35.8 grams
Explanation:
Multiply the density of ethyl alcohol by the volume because this will cause the units of mL to cancel out leaving you with the grams, or mass.
1.79 x 20 = 35.8
Answer:
166.56g of NH3 are produced
Explanation:
The reaction of N2 with H2 to produce NH3 is:
N2 + 3H2 → 2NH3
<em>Where 1 mole of N2 produce 2 moles of NH3</em>
<em />
4.89 moles of N2 with excess of H2 produce:
4.89 moles N2 * (2 moles NH3 / 1 mole N2) = 9.78 moles NH3
As molar mass of NH3 is 17.031g/mol, mass of NH3 produced is:
9.78 moles * (17.031g / mol) =
<h3>166.56g of NH3 are produced</h3>
Answer:
22.75 ⁰C.
Explanation:
- The amount of heat added to a substance (Q) can be calculated from the relation:
Q = m.c.ΔT.
where, Q is the amount of heat added,
m is the mass of the substance,
c is the specific heat of the substance,
ΔT is the temperature difference (final T - initial T).
∵ The amount of heat released by Fe = the amount of heat absorbed by water
<em>∴ - (m.c.ΔT) released by Fe = (m.c.ΔT) absorbed by water.</em>
- (4.45 g)(0.45 J/g·⁰C)(final T - 101.0 ⁰C) = (50.0 g)(4.186 J/g·⁰C)(final T - 22.0 ⁰C)
- 2.0025 final T + 202.2525 = 209.3 final T - 4604.
209.3 final T + 2.0025 final T = 202.2525 + 4604
211.3025 final T = 4806.2525.
<em>final T = 4806.2525/211.3025 = 22.75 ⁰C.</em>
Answer:
24.1kJ
Explanation:
Heat capacity of water = 4200
Latent Heat of ice = 333550
Heat of Fusion = m × l = 333550 × (32/1000)kg = 10,672 = 10.672kJ
H = (m × c × change in temperature)
H = (32/1000)kg × 4200 × (85 -- 15)
H = (32/1000) × 4200 × 100
H = 13,440J = 13.44kJ
So amount of heat = 13.44kJ + 10.672kJ = 24.112kJ ~ 24.1kJ