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At 1400 mm Hg and 286 K a diver exhales a 208 mL bubble of airthat is 77% N2 , 17% O2, and 6%CO2 by volume. How many milliliters would the volume of the bubble be at the surface and 298 K and how many moles of N2 are in the bubble?
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A chemist adds 75.0 mL of a 1.92 M nickel(II) chloride (NiCl2) solution to a reaction flask. Calculate the millimoles of nickel(II) chloride the chemist has added to the flask. Round your answer to 3 significant digits.
Why do the instructions call for using a saturated solution of NaOH rather than one at lower concentration? Why can we ignored in the calculation of the concentration of NaOH?
A compound contains only carbon, hydrogen, and oxygen. Combustion of 10.68 mg of the compound yields 15.48 mg CO2 and 7.39 mg H2O. The molar mass of the compound is 182.2 g/mol. What are the empirical and molecular formu ...
A sample consisting of 1.0 mol CaCO3(s) was heated to 800 °C, when it decomposed. The heating was carried out in a container fitted with a piston that was initially resting on the solid. Calculate the work done during co ...
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The mass of a sample of CaCO3 is 751 grams How many total atoms are present in this sample?
A hydrogen atom emits a photon as its electron changes from n = 5 to n = 2. For the H atom, E n = -2.18E-18*(1/n 2 ) J. What is the wavelength (in m) of the photon? ( ) m The number of significant digits is set to 3; t ...
The atomic masses of Lithium-6 (7.59%) and Lithium-7 (92.41%) are 6.0151 and 7.016 amu, respectively. Calculate the average atomic mass of chlorine. The percentages in parentheses denote the relative abundances.
Diagonal relationship and anomalous behaviour of the each element of the periodic table
The common charges of an element can be related to the electron configuration of the element. Why would copper ions have 2 common charges? Explain each of them in terms of the electron configuration.
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