Based upon Max Planck's theory of black-body radiation, Einstein theorized that the energy in each quantum of light was equal to the frequency multiplied by a constant, later called Planck's constant. A photon above a threshold frequency has the required energy to eject a single electron, creating the observed effect.
C. A magnet causing a metal object to move
Answer:
Part A. The solubility of gases in water increases with increasing temperature.
Part B. Hexane (C₆H₁₄)
Explanation:
Part A
<em>Considering factors that affect that solubility which statement below true?
</em>
- <em>With a few exceptions, the solubility of most solid solutes in water decreases as the solution temperature increases.</em> FALSE. With a few exceptions, the solubility of most solid solutes in water increases as the solution temperature increases.
- <em>The solubility of gases in water increases with increasing temperature. </em>
FALSE. In general, the solubility of gases decreases with increasing temperature.
- <em>The solubility of a gas in any solvent is increased as the partial pressure of the gas above the solvent Increases.
</em> TRUE. According to Henry's law, the solubility of a gas in a liquid is proportional to its partial pressure.
- <em>Substances with similar intermolecular attractive forces tend to be insoluble in one another.</em> FALSE. Substances with similar intermolecular attractive forces tend to be soluble in one another.
Part B
<em>
Which of these is the best solvent for nonpolar solutes?
</em>
<em>acetone (CH₃COCH₃)
</em>
<em>ethanol (CH₃CH₂OH)
</em>
<em>hexane (C₆H₁₄)
</em>
<em>water</em>
There is a general rule that states "like dissolves like", meaning polar is soluble in polar and nonpolar is soluble in nonpolar. Thus, hexane, which is the least polar solvent, would be the best choice for nonpolar solutes.
Answer: Use the formulas below to calculate the density of substances and ... Your friend wants to sell you a chain and swears that it's silver.
Explanation:
Answer:
The correct answer is option D.
Explanation:
Mass of compound = 42.0 g
Mass of carbon in compound = 36.0 g
Mass of hydrogen in compound = 6.0 g
Moles of carbon = 
Moles of hydrogen = 
Empirical formula of the compound, divide least number of moles from each element.
Carbon = 
Hydrogen = 
Empirical formula of compound = 
The empirical formula of the compound can be calculated from the given data.
