Explain how much heat is liberated
Calcium Oxide and water react in an exothermic reaction:
Cao (s) + H2O (l) → Ca(OH)2 ΔH= -64.8kj/mol
Explain how much heat is liberated when 7.15 g CaO(s) is dropped into a beaker which is having 152 g H2O?
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Identify the uncertainty in position associated with an electron that is moving with a velocity of 289 km/s. The uncertainty in the velocity is 5.00%. The electron rest mass is 9.11e-31kg.
Two independent random samples of size n1 = 24 and n2 = 20 are taken from two normal populations. The sample means are x1-bar = 220 and x2-bar = 240. The variances are sigma1^2 = 15 and sigma2^2 = 18. Find the following:
Explain what weight of water would be necessary to carry over 1g of toluene if a mixture of toluene and water is distilled at 97 C.
Determine what fraction of the incident intensity emerges from the Polaroid? When this beam is then incident on the second sheet of Polaroid having its transmission axis all along the vertical, find out what fraction of the beam's original intensi
A person's prescription for her new bifocal glasses calls for the refractive power of -0.500 diopters in the distance-vision part and a power of around 1.90 diopters in the close-vision part.
Thirty two students taking Calculus II and Physics I, and 11 students taking Physics I and Discrete Mathematics II. How many of such students are taking exactly two of the three courses?
Calculate the standard enthalpy of formation (ΔHf) of NaF (s) when .560g of Na (s) reacts with excessF2 (g) to produce the NaF (s), 13.8 kj of heat is evolved at standard state conditions.
A dipole having dipole moment of 1.5 nC*m is oriented at 30 degrees to an electric field, 4.0*10^6 N/C. (i) Find out the torque on the dipole? (ii) Determine how much work is needed to rotate the dipole till it is parallel to the field.
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