Gabbywd

Will the extraction of a solid mixture with a hot solvent generally be more or less

efficient than an extraction with the same solvent at room temperature? Explain your

answer.

I am 21 years old, and I go to college and receive financial aid grants. I never had a job before as well. I just got a 1098-T form in the mail. Am i supposed to file taxes? what am i supposed to do with this form?

A 17-centimeter pendulum moves according to the equation 𝜃 = 0.17 sin(5t), where 𝜃 is the angular displacement from the vertical in radians and t is the time in seconds. Determine the maximum angular displacement 𝜃max and the rate of change of 𝜃 when t = 3 seconds. (Round your answers to three decimal places.)

Determine which statement is true. Remember that any spontaneously operating cell has a positive E0cell value.

Question options:

Aluminum is the cathode and copper is the anode.

Zinc is the cathode and copper is the anode.

Aluminum is the cathode and zinc is the anode.

Zinc is the cathode and lead is the anode.

Copper is the anode and lead is the cathode.

Copper is the cathode and zinc is the anode.

Aluminum is the cathode and lead is the anode.

Copper is the anode and aluminum is the cathode.

 p means -log.

Calculate the p H of the diprotic acid H2 A (such as H2 SO4) where the dissociation of the first H is strong and the dissociation of the second H is weak but the 5% rule does not apply (K2 is too large relative to the initial concentration of H Aminus).

1.Assume the initial concentration of H2A is 0.0140 M.

2.Assume the initial concentration of H2A is 0.0116 M.

1.A value of k is found from the rate equation Rate = k[A]m[B]n. If m=3 and n=3 and the unit for the initial rate is M/h. The unit of k is found to be Mx h-1 (M to the power of x h to the power of minus 1). What is the value of x?

2.Two points that lie on the line of best fit for a ln k versus 1/T graph are (0.00425, -1.64) and (0.00605, -5.42). What is the activation energy in kJ/mol?

Given the following mixture of two compounds 30.00 mL of X (MW =95.00 g/mol)(density 0.866 g/mL) and 770.00 mL of Y (51.00 g/mol))(density 1.052 g/mL). The vapor pressure of pure Y is 29.00. Calculate the vapor pressure of the solution.

3.86 grams of a water soluble ionic compound with the formula of A1X2 (Molar mass of 125.00 grams/mol) is dissolved in 161 grams of water. Calculate the expected freezing point of the solution. The freezing point depression constant for water is 1.86 degrees C/molal. The freezing point of water is 0.26 degrees C.

 Does a dominant gene mean it will always be the most prevalent in the population? In other words, will it tend to always be in higher frequency than the recessive gene?  

How does the founder effect differ from a genetic bottleneck? How are they similar?

Given the following mixture of two compounds 40.00 mL of X (MW =67.00 g/mol)(density 0.906 g/mL) and 690.00 mL of Y (81.00 g/mol))(density 0.858 g/mL). If R = 0.08206 L.atm/mol/K, calculate the osmotic pressure of the solution at 26 degrees C.

Given the following mixture of two compounds 20.00 g of X (MW =83.00 g/mol) and 880.00 mL of Y (72.00 g/mol))(density 0.881 g/mL), calculate the molarity of X.

What is the expected van't Hoff factor for A3B2? Assume A3B2 is a water soluble ionic compound which completely dissociates.

3.52 grams of a water soluble ionic compound with the formula of A1X4 (Molar mass of 125.00 grams/mol) is dissolved in 66 grams of water. Calculate the expected boiling point of the solution. The boiling point elevation constant for water is 0.512 degrees C/molality. The boiling point of water is 98.20 degrees C.

Given the following mixture of two compounds 20.00 g of X (MW =83.00 g/mol) and 880.00 mL of Y (72.00 g/mol))(density 0.881 g/mL), calculate the molarity of X.

Given the following mixture of two compounds 25.00 mL of X (MW =87.00 g/mol)(density 1.169 g/mL) and 740.00 g of Y (80.00 g/mol))(density 1.074 g/mL), calculate the molarity of X.