As thermal energy comes from moving particles, it is a form of kinetic energy. Thermal energy comes from a substance whose molecules and atoms are vibrating faster due to a rise in temperature.

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3 years ago

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an aqueous solution has a mass of 490 grams containing 8.5×5103 gram of calcium ions. the concentration of calcium ions is in th

Alex777 [14]

There are several various of expressing concentration. For instance, mass percent, volume percent, Molarity, Normality, Molality, etc.

In present case, weight of solute and solvent are given, so it will be convenient to express concentration in terms of mass percent.

Given: weight of solute (Ca2+) = 8500 g
weight of solvent (water) = 490 g.
Therefore, mass of solution = 8500 + 490 = 8990 g

Now, mass percent = $\frac{\tect{Weight of solute}}{\text{Weight of solution}} X 100$
= $\frac{\tect{8500}}{\text{8990}} X 100$
= 94.55 %

Answer: Concentration of calcium ions is in this solution is 94.55 % (w/W)

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2 years ago

Which particle changes the mass of the isotope the most? which particle changes the mass of the isotope the most? electron captu

MAXImum [283]

This question is absurd

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2 years ago

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Who started sneakers

hodyreva [135]

In late 18th century, people wore rubber soled shoes called plimsolls, but they weren't the best sneakers. Around 1892, a US company named Keds started sneakers with a canvas top and rubber soles. By 1917, these were mass produced.

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2 years ago