""Three-Two" Beer is 3.2% (ethanol) by WEIGHT. Standard "full strength" beer is typically ~4-5% (ethanol) by VOLUME. Take the density of water to be d(H2O) ~ 1.0 g/mL and the density of ethanol to be d(EtOH) ~ 0.80 g/mL and compare 3.2 and standard on a weight percent or volume percent basis. Show all of your work" I'm honestly not even sure what this question is asking me.
In: Chemistry
A volume of 2.0 L of air at 37°C is expelled from the lungs into cold surroundings at 1.3°C. What volume (in L) does the expelled air occupy at this temperature? The pressure and the number of gas particles do not change?
The pressure inside a 1.0 L balloon at 25°C was 750 mm Hg. What is the pressure (in mmHg) inside the balloon when it is cooled to −58°C and expands to 3.2 L in volume?
In: Chemistry
The speed of a runner increased steadily during the first three seconds of a race. Her speed at half-second intervals is given in the table. Find lower and upper estimates for the distance that she traveled during these three seconds.
| ft (smaller value) |
| ft (larger value) |
| t (s) | 0 | 0.5 | 1.0 | 1.5 | 2.0 | 2.5 | 3.0 |
| v (ft/s) | 0 | 6.7 | 11.2 | 14.1 | 17.5 | 19.8 | 20 |
In: Math
Tooth enamel is composed of hydroxyapatite, whose simplest formula is Ca5(PO4)3OH, and whose corresponding Ksp = 6.8 × 10-27.As discussed in the “Chemistry and Life” box on page 730, fluoride in fluorinated water or in toothpaste reacts with hydroxyapatite to form fluoroapatite,
Ca5(PO4)3F,whose Ksp = 1.0 × 10-60.
a)Write the expression for the solubility-constant for hydroxyapatite and for fluoroapatite.
(b) Calculate the molar solubility of each of these compounds.
In: Chemistry
1. We define the activity of pure liquids as 1 to define the standard state. However, this is an arbitrary choice. Find the dissociation constant, K, for the autoprotolysis of pure water using the molarity standard state for water (i.e. defining the activity as 1 for a water concentration of 1 mol/l). You may take the density of water to be 1.0 g/ml.
2. Will K have the same value in this standard state at 60?C?
In: Other
Find the equilibrium concentration of the Mn(C2O4)22− ion(in M) when 0.50 L of 0.030 M Mn(NO3)2 are mixed with 1.0 L of 1.2M Na2C2O4. Kf of Mn(C2O4)22− is 6.3 x 105.
What is the molar solubility of lead(II) chromate in 0.10 M Na2S2O3? For PbCrO4, Ksp = 2.0 x 10–16; for Pb(S2O3)34–, Kf = 2.2 x 106.
In: Chemistry
1. What will be the concentration of Cl2O after a mixture that contains [H2O] = 1.00 M and [Cl2O] = 1.00 M comes to equilibrium at 25oC?
H2O (g) + Cl2O (g) ⇄ 2HOCl (g) Kc=0.0900
2. Calculate the pressure of Br2 (g) at equilibrium, in a mixture of Cl2, Br2, and BrCl, if the initial pressure of Cl2 and Br2 was 1.0 atm.
Cl2 (g) + Br2 (g) ⇄ 2BrCl (g) Kp = 4.7 x 10-2
In: Chemistry
2 NH3 (g) + 2 H2O (g) = 2 NO (g) + 5 H2 (g)
When 12.0 grams of ammonia; 16.0 grams of water; and 20 grams of NO (g) are put into a closed, expandable container kept at 160 oC, 1.0 atm, final partial pressure of NO (g) is 20 % greater than the final partial pressure of the hydrogen gas. What is the final volume of the expandable container?
(Answer = 98.1 Liters )
In: Chemistry
Suppose that there are two industries, A and B. There are five firms in industry A with sales at $5 million, $2 million, $1 million, $1 million, and $1 million, respectively. There are four firms in industry B with equal sales of $2.5 million for each firm. The four-firm concentration ratio for industry A is:
A. 0.9.
B. 1.0.
C. 0.8.
D. 0.7.
I don't understand why the answer is 0.9 can someone explain to me.
In: Economics
You have a market portfolio and the risk premium for holding it is 5% per year. rf = 5%. There are two new stock issues: A or B. A stock has a standard deviation of 40%, a beta of 0.5, and an expected return of 8.0%. B stock has a standard deviation of 30%, a beta of 1.0, and an expected return of 9.0%. If you can add at most one stock to your portfolio, which one do you choose?
In: Finance