When 245g of an unknown weak acid ha with a molar mass of
When 2.45g of an unknown weak acid (HA) with a molar mass of 85.0 g/mol is dissolved in 250.0 g of water, the freezing point of the resulting solution is -0.255 C. Calculate Ka for the unknown weak acid.
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Which expression represents the percent by mass of nitrogen in NH4NO3. A) 14 g N/80 g NH NO 100% B) 28 g N/80 g NH NO 100% C) 80 g NH NO /14 g N 100% D) 80 g NH NO /28 g N 100%
Assume frictionless flow in a long, horizontal, conical pipe. The diameter is 12 inches at one end and 6 inches at the other. The pressure head at the smaller end is 16 feet of water.
Describe a modification to the random port scan, as describe in previous exercise, so that it still use a randomly generated sequence of port numbers but will now have exactly the same number of attempted TCP connections as a sequential port scan.
Draw and explain a pump curve that illustrates the effect of throttling in the CLOSED direction (i.e., reducing flow) the discharge valve for a constant speed centrifugal pump installed in a cooling water system.
A typical paper clip weighs 0.59 gram and consists of BCC Iron. The density of iron is 7.87 gram/cm3 and its atomic radius is 0.124 nm. What is the volume of a unit cell in (nm)3. What is the volume of a unit cell in cm3.
The hose has an inside diameter of 2 inches. If viscous effects are neglected (inviscid/frictionless flow) and the hose outlet is 10 feet below the surface of the pond, calculate the volumetric flow rate inside the hose in units of gallons per min
Two input voltages are v1(t) and v2(??). Design an op-amp circuit that will generate the voltage 3v1(??) - 2??2(??). Its input resistance must exceed 1 kΩ and its output resistance must be less than 10 Ω. Use more than one op-a
Write the correct equation accounting for the ready formation of metallic deposit on placing a magnesium strip into 0.1 M iron nitrate
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You now turn your attention again to the lower intertidal zone. Individuals of all three species can survive there in the absence of the others
Which of the following occurs during the replication of a DNA molecule? A will be paired with G, and T will be paired with
What degree of invasiveness would you be willing to accept if you were conducting an experiment using brain measures to examine welfare?
Q1. Define extinction. Q2. Name and describe two natural factors that contribute to extinction.
Question: Which of the following is a risk of low crop diversity? Better resistance to climate change Increased number of wild species of the crop
Describe the various layering arrangements and cell shapes of epithelial tissue. What characteristics are common to all epithelial tissues?
What effect does fascicle arrangement have on a muscle's action? Explain the difference between axial and appendicular muscles.