Hello!
To find the mass in grams of 2.00 * 10²³ molecules of F₂ you'll need to apply the
Avogadro's number, which tells the number of molecules in a mol of a substance, and the
Molar Mass, which tells the weight of a mole of a substance. These two quantities are used in the following conversion factor:
So, the mass of 2.00 * 10²³ molecules of F₂ is
12,51 gHave a nice day!
Answer:
North Korea (The Korean War).
Explanation:
When Korea was liberated from Japanese control at the end of the Second World War, the United States and the Soviet Union agreed temporarily to divide Korea at the 38th parallel of latitude north of the equator. This division resulted in the formation of two countries: communist North Korea (supported by the Soviets) and South Korea (supported by the United States).
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.
Amount (mol) of solute in 145.6 L of 0.850 M sodium cyanide
<h3>What is molarity?</h3>
Molar concentration (also known as molarity, quantity concentration, or substance concentration) is a measure of the concentration of a chemical species in a solution, specifically of a solute, in terms of amount of substance per unit volume of solution. The most often used unit for molarity in chemistry is the number of moles per liter, denoted by the unit symbol mol/L or mol/dm3 in SI units. A solution with a concentration of 1 mol/L is referred to as 1 molar, or 1 M.
To learn more about molarity visit:
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Answer:
0.125 atm
Explanation:
From the question,
Applying boyles law
PV = P'V'................................. Equation 1
Where P = Initial pressure, V = Initial volume, P' = Final pressure, V' = final Volume.
make P' the subject of the equation
P' = PV/V'............................. Equation 2
Given: P = 97.5 atm, V = 90 mL = 0.09 L, V' = 70 L.
Substitute these values into equation 2
P' = 97.5×0.09/70
P' = 0.125 atm
