Homework Answers Page 10741

• What's the final temperature in bomb calorimeter if 1.785 grams of benzoic acid (##HC7H5O2##) is combusted in a calorimeter with heat capacity of 5.02 Kj/C and initial temperature of 24.62 degree Celsius? Heat of combustion for benzoic acid is -26.42 Kj/g.

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  Chemistry

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• How does tuberculosis affect the lungs? How is tuberculosis spread?

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  Psychology

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• How respiration in plants different from that in animals?

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  Biology

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• How is the acceleration of a moving object determined?

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  Physics

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• If a DNA strand has the nucleotide sequence of CCGAGATTG, what is the nucleotide sequence of the complementary strand?

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  Biology

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• What is the hyphen notation of the three isotopes of hydrogen?

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  Chemistry

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• What is the bond polarity of h2s?

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  Chemistry

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• What is a possible explicit rule for the nth term of the sequence: ##25, 15, 5, -5, -15##?

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  Precalculus

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• What is the difference between gravitational force and weight?

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  Physics

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• The simplest formula for butane is C2H5 and its molecular mass is about 60. What is the molecular formula of butane?

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  Chemistry

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• What are the x-intercepts of ##y=x^2+2x-15##?

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  Algebra

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• How do you calculate the half life of carbon 14?

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  Chemistry

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• What is the variance of the standard normal distribution?

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  Statistics

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• How do sound waves transfer energy?

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  Physics

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• Does the VSEPR theory predict that XeF2 is linear?

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  Chemistry

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• A satellite is placed in equatorial orbit above Mars, which has a radius of 3397km and a mass M=6.4x10^23 kg. The mission of the satellite is to observe the Martian climate from an altitude of 488km. What is the orbital period of the satellite?

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  Physics

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• Throughout Earth's recorded history what is the hottest and the coldest temperature ever recorded? What parts of the Earth had these temperatures?

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  Science

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• What is an example of diction?

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  English

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• What are some examples of rhetorical questions from the Bible?

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  English

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• What is the function of viral nucleic acid?

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  Biology

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• How do you express 12 km/L in miles/gal?

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  Physics

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• Is -2 real number, rational number, whole number, Integer, Irrational number?

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  Algebra

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• What are examples of prepositions used in sentences?

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  English

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• Why is flammability a chemical property?

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  Chemistry

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• What is the stronger base: ammonia or ethoxide ion?

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  Chemistry

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• Some CuSO4.5H20 was heated at 120C with the following results: Mass of crucible=10.00g Mass of crucible + CuSO4.5H20=14.98g Mass of crucible + recidue=13.54g. How many molecules of water of crystalization were lost? (H=1,Cu=63.5,O=16,S=32)

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  Chemistry

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• What is the difference between an equation written in function notation and one that is not?

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  Algebra

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• How is astronomy related to biology?

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  Science

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• What is the hybridization of so2?

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  Chemistry

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• What is the difference between isobutane and n-butane ?

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  Chemistry

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• How do you put the equation ##2y-3x=5## into slope-intercept form, and graph the equation?

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  Algebra

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• What is chromatin?

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  Biology

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• What kind of tissue is arrector pili muscle?

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  Psychology

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• How do you find the derivative of ##y =sqrt(x)## using the definition of derivative?

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  Calculus

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• How do you verify ##tanA=secA/cscA##?

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  Geometry

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• If 1 light year is 63,240 AU (astronomical units), how far in AUs is Alpha Centauri, which is 4.32 light years from the Earth?

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  Algebra

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• How can I draw metallic bonds?

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  Chemistry

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• What is the integral of ##xe^x## from -infinity to 0?

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  Calculus

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• What is meteorology?

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  Science

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• How do you graph quadratic functions ##y=x^2-4x+7##?

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  Algebra

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• What is longitude ?

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  Science

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• What causes gas pressure (in terms of kinetic theory)?

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  Chemistry

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• What is the definition of polyhedron?

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  Geometry

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• How do you evaluate ##tan(pi/6)##?

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  Geometry

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• How would you calculate the formal charge of NH3?

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  Chemistry

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• What is (5 square root of 5) squared?

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  Algebra

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• How does the organization of genetic material differ in prokaryotic and eukaryotic organisms?

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  Biology

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• What is the biggest muscle in the human body?

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  Psychology

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• Explain.(i)Pentane is distilled off first when a liquid mixture containing pentane,heptane and nonane is heated.(ii)Hexane floats on water. (iii) cyclopentane may be easily separated from an aqueous salt solution?

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  Chemistry

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• What does it mean when a calculated chi-squared value equals 0 (zero)?

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  Statistics

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