Chemistry
Chemistry, 23.06.2019 15:30, cadecurtis

Express your answer using two significant figures. 1.7 km^2

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Physics, 10.07.2019 23:20, jakhunter354
Acluster of galaxies has a radius of about 4.8 million light-years (4.5×1022 m ) and an intracluster medium with a temperature of 6.0×107 k . [hint: consult mathematical insight 23.3.] 1) estimate the mass of the cluster. give your answer in both kilograms and solar masses. suppose the combined luminosity of all the stars in the cluster is 7.5×1012 lsun . express your answer using two significant figures. m= 2) express your answer using two significant figures. m= 3) what is the cluster's mass-to-light ratio? express your answer using two significant figures.
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Chemistry, 14.09.2019 07:10, calebbailey2318
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Physics, 14.09.2019 10:30, sherlock19
The cheetah is considered the fastest running animal in the world. cheetahs can accelerate to a speed of 21.7 m/s in 2.50 s and can continue to accelerate to reach a top speed of 28.7 m/s. assume the acceleration is constant until the top speed is reached and is zero thereafter. 1) express the cheetah's top speed in mi/h. (express your answer to three significant figures.) 2) starting from a crouched position, how long does it take a cheetah to reach its top speed? (express your answer to three significant figures.) 3) how far does it travel in that time? (express your answer to three significant figures.) 4) if a cheetah sees a rabbit 120 m away, how long will it take to reach the rabbit, assuming the rabbit does not move? (express your answer to three significant figures.)
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Chemistry, 06.10.2019 07:01, mommytobe2019
What is the mass, in grams, of 1.50 mol of iron (iii) sulfate? express your answer using three significant figures. mm = nothing g request answer part b how many moles of ammonium ions are in 6.935 g of ammonium carbonate? express your answer using four significant figures. nn = nothing mol request answer part c what is the mass, in grams, of 1.20×1021 molecules of aspirin, c9h8o4? express your answer using three significant figures. mm = nothing g request answer part d what is the molar mass of diazepam (valium®) if 0.05570 mol weighs 15.86 g? express your answer using four significant figures. mm = nothing g/mol
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