Answer:
<em>C</em> C2H5OH = 7.598 molal
Explanation:
- molality (m) C2H5OH = n C2H5OH / Kg H2O
∴ V C2H5OH = 50.0 mL
∴ V H2O = 112.7 mL
∴ T = 20 °C
∴ δ C2H5OH (20°C) = 0.789 g/mL
∴ δ H2O (20°C) = 1.00 g/mL
∴ Mw C2H5OH = 46.0684 g/mol
⇒ n C2H5OH = (50.0 mL)×(0.789 g/mL)×(mol/46.0684 g) = 0.8563 mol
⇒ mass H2O = (112.7 mL)×(1.00 g/mL)×(Kg / 1000 g) = 0.1127 Kg
⇒ <em>C</em> C2H5OH = 0.8563 mol C2H5OH / 0.1127 Kg H2O
⇒ <em>C</em> C2H5OH = 7.598 molal
Lamps light up by electricity. Although, i'm sure you knew that by now. When a light bulb connects to an electric power supply, an electric current flows between the two metal contacts. As electricity flows between the wires and filament, the filament heats up. The filaments begin to emit photons, which are essentially small packets of light.
Hope this helps!
I believe it’s 39.0 if I’m not mistaken.
So the first thing that you need to do is to find the moles in 26 tons of SO2, which will be the same amount of mols as sulphur as it is a 1:1 molar ration so it might be expressed like this:
26x10^6 tons= 26000x10^6kg= 26000000x10^6g.
<span>26000000x10^6/(32+32.1)= 405616x10^6 mol of SO2 and thus sulfur. times the mol by the rmm (units of g/mol). </span>
<span>405616x10^6mol*32.1g/mol = 13020273x10^6g = 13020x10^6 kg = 13.02x10^6tons </span>
<span>the final answer is 13 million tons. The answer is in Tones because you need to convert g into moles with this idea </span><span>1 ton= 1000kg = 1000000g. I hope this helps a lot </span>