Answers edited by Junaid Mirza
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Question #21c1a
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A steam engine receives 300 kJ of heat from its environment and does 400 kJ
of work. How much does the energy of the steam engine change?
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Question #a8f52
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Specific heat is the amount of heat required to raise the temperature of 1 g of a substance by what?
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For a first order reaction the value of rate constant for the reaction #A(g) -> 2B(g) + C(s)#?
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An ambulance approaches you while you are stationary. You hear a siren with a frequency of #540#Hz. Once he passes you and is going away from you the frequency is now #440#Hz. How fast was the ambulance going?
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An oscillator makes four vibrations in one second. What is its period and frequency?
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A marble is flicked horizontally off a desk with a speed of 3.1 m/s. If it takes the marble 0.8 seconds to hit the ground, how far from the desk does it land?
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In which of the following options is magnetic quantum number (m) = zero for all the three orbitals in a given option? A) 2s, 2px, 3dxy B) 3s, 2pz, 3dz^2 C) 2s, 2pz, 3dx^2 - y^2 D) 3s, 3px, 3dyz
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Question #dd125
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Question #25534
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The formula of the compound is #A_2B_5#. The number of electrons in the outermost orbits of A and B respectively are?
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Omg I need to write the nuclear equation for these things :) Can I get some help please? Awesome, thanks!
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Question #6a42d
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A car traveling with a velocity of 24 m/s is
accelerated uniformly at 1.6 m/s
2
for 6.8 s.
What is its final velocity?
Answer in units of m/s
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The freezing point of p-dichlorobenzene (MW = 146.992 g/mol) is 53.1 °C. Its Kf value is 7.10 °C/m. A solution of 1.52 g of sulfanilamide in 10.0 g of p-dichlorobenzene freezes at 46.7 °C. ?
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How many moles of helium is present in 10g of helium?
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A warehouse floor has a perimeter of 6,615 feet. What is the perimeter of the floor in yards?
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Question #0ef65
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In a 100m sprint race, Usain Bolt accelerates out of the blocks and reaches a velocity of 6.92 m/s at the 20m point. What is Usain's acceleration out of the blocks?
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Question #22baa
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Question #441d9
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Question #42471
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Question #1f441
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Question #92bd2
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Question #fa8ed
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Where does embryonic development occur in mammals?
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Question #aac3c
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Question #905c7
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A 2110-kg space station orbits Earth at an altitude of 551000 m. What is the magnitude of the force with which the space station attracts Earth?
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What mass of #"ammonium chloride"# solute is required to prepare a #200*mL# of solution for which the concentration was #0.100*mol*L^-1#?
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Question #11541
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A plane cruising at 263 m/s accelerates at
24 m/s
2
for 7.1 s.
What is its final velocity?
Answer in units of m/s.
How far will it have traveled in that time?
Answer in units of m.
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Question #9154e
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Question #e9d68
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How many moles of helium is present in 10g of helium?
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Question #d361f
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A water wave travels 36 meters in 15 seconds. What is the speed of the wave?
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Question #0fde8
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Work out?
How much work is need to carry a change of 24×10-6c from one point in an electronic field to another point when the potential difference between the two points is 1500V?
Thanks
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Question #a5c5e
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Question #8cb7f
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Question #056e5
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What torque would have to be applied to a rod with a length of #3 m# and a mass of #4 kg# to change its horizontal spin by a frequency #5 Hz# over #4 s#?
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What is common between the three states of matter?
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Question #c13a6
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Question #f3e04
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Predict the product in the combination reaction below. Al (s) + N2 (g) → ________?
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Question #142a5
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Question #90e91
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If a electromagnetic wave has a frequency of 7.97e14 Hz, what is its wavelength? To what part of the spectrum does this wave belong?
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Question #e8c70
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Compute the acceleration due to gravity at a place where a simple pendulum 150cm long makes 100 vibrations 245sec?
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Question #7024c
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Question #edacf
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For the reaction N2(g)+3H2(g)--> 2NH3(g). How many moles of N2 will be need to react with exactly 1.00mol if H2?
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Question #6007d
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Question #eb7d4
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Question #8b7bd
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In a sample of excited hydrogen atoms electrons make transition from n = 3 to n = 1 and emitted photons strike on a metal of work function 6.08 eV. The maximum kinetic energy of the ejected electron in the process will be?
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What are the four quantum numbers for the 3rd electron in xenon?
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Question #9f15c
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Question #76b25
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How many grams of chloroform are in #"285 mL"# of a #"0.770 M"# solution?
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What is angular velocity of an oscillating pendulum of length 150cm?
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The quantum numbers n = 4, l = 1, m_l = 0 could represent a valence electron in which atom in its ground state?
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Question #64190
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Question #a0a3b
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