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When a particular marble is dropped into a beaker of water, it sinks to the bottom. Which is the best explanation? A. The surface area of the marble is not large enough to be held up by the surface tension of the water. B. The mass of this marble is greater than the mass of the water in the beaker. C. The mass of this marble is greater than the mass of the water that the marble displaces. D. The force from dropping this marble is greater than the surface tension of the water. E. The mass and volume of this marble are greater than the mass and volume of the water in the beaker. F. Briefly explain why the answer that you have chosen above in part A is correct.
Hospital X-ray generators emit X-rays with wavelength of about 15.0 nanometers (\rm nm), where 1\;{\rm nm}= 10^{-9}\;{\rm m}. What is the energy of the X-rays
required to exactly titrate the Fe2+ in a sample. How many moles of Fe2+ were in the sample?
1)The standard electrode potential for the reduction of Eu3+(aq) to Eu2+(aq) is ?0.43 V. determine which of the following is capable of reducing Eu3+(aq) to Eu2+(aq) under standard-state conditions. (a) Sn2+(aq) (b) ln(s) (c) HCN(aq) (d) La(s)
What is the heat of combustion per gram of butane?
What volume (in milliliters) of 0.190 M NaOH should be added to a 0.135 L solution of 0.022 M glycine hydrochloride
Formic acid, HCHO2, is a convenient source of small quantities of carbon monoxide. When warmed with sulfuric acid, formic acid decomposes to give CO gas
What is the pH of a 0.25 M NaOH solution? A Rolaids tablet contains calcium carbonate, which neutralizes stomach acid. If 44.55 mL of 0.488 M hydrochloric acid is required to neutralize one tablet, how many milligrams of calcium carbonate are in a ..
In mexico avocados are 48 pesos per kilogram. What is the cost, in cents, of an avocado that weighs 0.45 lb if the exchange rate is 13 pesos to the dollar
what is the total number of electron domains for a molecule having trigonal pyrmidal molecular geometry such as NH3
what is the wavelength in meters of a proton traveling at 2.70X10^8 m/s? (assume the mass of the proton to be 1.673X10^-27 kg)
Calculate the change in entropy (deltaS) when one mole of diamond is heated from a temperature of 0 K to 400 K at a constant pressure of 1 bar. The temperature-dependent heat capacity of diamond is Cv
Calculate the average translational kinetic energy (sometimes just called average kinetic energy) for one mole of gas at 385 K.
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