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1) A 149.3-g sample of a metal at 75.9°C is added to 149.3 g H2O at 14.9°C. The temperature of the water rises to 18.4°C. Calculate the specific heat capacity of the metal, assuming that all the heat lost by the metal is gained by the water. The specific heat capacity of water is 4.18 J/°C·g.
Specific heat capacity = ________J/°C·g
2) In a coffee-cup calorimeter, 110.0 mL of 1.4 M NaOH and 110.0 mL of 1.4 M HCl are mixed. Both solutions were originally at 21.7°C. After the reaction, the final temperature is 31.1°C. Assuming that all the solutions have a density of 1.0 g/cm^3 and a specific heat capacity of 4.18 J/°C·g, calculate the enthalpy change for the neutralization of HCl by NaOH. Assume that no heat is lost to the surroundings or to the calorimeter.
ΔH = _________kJ/mol
an electron has a speed of 500m/s accurate to 0.0001% with what fundamental accuracy can we locate the position of the electron?
Derive the transfer function 𝐺1 (𝑠) = 𝑋(𝑠)/𝑈(𝑠) for the first-order system given by the dynamic equation 𝑑x/𝑑𝑡 + 𝑘𝑥 = 𝑢(𝑡). [2]
Make Class Students, having
1. Private data items (First Name, Full Name, Address),
2. Public member functions, getData, showData.
3. Main () function
Create Array of objects (students), (maximum 5 students), call member functions
getData, showData const
Chlorine gas (Cl2) occupies a volume of 25.0 mL at 310K. Calculate the volume it will occupy when heated to 590 K.
What impact did an increase in prices of petrol, dissel have in the South African economy as a whole...which sectors affected the most as due to the War in between Russia and Ukrain
Draw the Philips Curve in 1980 with the economy facing stagflation, Label this point "A''
Show the short-run results of Chairman Volcker's leadership on the Philips curve, Label this point of short-run equilibrium point "B" and indicate new inflation and unemployment rate .
Fur color in mice is the example of
A group of students got a grade in their Math subjects; 78, 80, 81, 89, 93, 95. Consider samples of size 3 that can be drawn from this population.
How we can differenciate the statement whether it is law, theory or hypothesis
