Well, the sun is in space, right? It has to be able to transfer heat through space, or how would it get to us? Radiation helps transfer heat.
Answer:
108.43 g.
Explanation:
- <em>Adding solute (KNO₃) to water causes depression of freezing point of water (collegative properties).</em>
- We can predict the change in the freezing point (ΔTf) of water using the relation:
<em>ΔTf = i.Kf.m,</em>
where, ΔTf is the elevation in boiling water (ΔTf = 0.0°C - (- 14.5°C) = 14.5 °C).
i is van 't Hoff factor, The van 't Hoff factor is the ratio between the actual concentration of particles produced when the substance is dissolved and the concentration of a substance as calculated from its mass. For most non-electrolytes dissolved in water, the van 't Hoff factor is essentially 1.
i for KNO₃ = 2/1 = 2.
Kf is the molal freezing constant of water (Kf = 1.86 °C/m).
m is the molality of the solution.
∵ ΔTf = i.Kf.m,
∴ m = (ΔTf)/(i.Kf) = (14.5°C)/(2)(1.86 °C/m) = 3.9 m.
- <em>molality (m) is the no. of moles of solute dissolved in 1.0 kg of solvent.</em>
<em>m = (no. of moles of KNO₃)/(mass of water (kg)) = (mass/molar mass of KNO₃)/(mass of water (kg)).</em>
<em></em>
∴ 3.9 m = (mass of KNO₃ / 101.1 g/mol)/(0.275 kg).
∴ mass of KNO₃ = (3.9 m)(101.1 g/mol)(0.275 kg) = 108.43 g.
Answer:
I believe the answer is A. molecules are larger than atoms so they should be visible and atoms and molecules are indeed different
Answer:
Hello there
Your answer is :
Electrolysis of water is decomposition for the water into oxygen (CO^2) and the hydrogen gas due to the passage of it's electric current. To make power from water to power stuff up.
i hope this helps you out
Have great morning
Faithrawlins14
Of course we can ignore the electron mass, but if there are 16 neutrons, and 16 protons we have the
32
S
isotope, which is approx.
95
%
abundant.