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(a) How many atoms are in 46.89 grams of Tin?
(b) you have 54.25ml NO2 gas. how many grams of NO2 at STP are there? Show method of calculation, also formula that used and please round off to inappropriate sig fig
Determine the [NaCl] in ppm in the original diluted 100 mL flask.
What is the maximum number of electrons in an atom whose highest-energy electrons have the principal quantum number n = 5
In an artificial transmutation process, a nucleus of Al-27 absorbs an alpha particle and emits a neutron. What is the new nuclide formed
Calculate the enthalpy of reaction at 490 K. You may assume that the heat capacity is constant, and corresponds to the value at 298 K. You may also assume that there are no phase changes in this system
The column is run with a solvent system based on hexanes, but which becomes more polar with the addition of more and more dichloromethane over time. Predict the elution order.
A compound is constituted by mass of 22.6% phosphorus, the rest being chlorine. Given that a volume of 307 mL of the gas has a mass of 1.55 g at 25 °C and 90 kPa, find the molecular formula for this compound
Gives what happens at low pH for aluminum hydroxide. A) Al(OH)3 precipitates B) Al precipitates C) Al dissolves D) Al(H2O)63+ dissolves
Use Slater's rules to calculate the shielding constant and effective nuclear charge for a 5s, 5p, and 4d electron in the tin atom. Which of these electron experience the lowest effective nuclear charge
Determine the pH of an HF solution of each of the following concentrations: a) 4.60 x 10^-2 b) 2.30 x 10^-2
Liquid sodium is being considered as an engine coolant. How many grams liquid sodium (minimum) are needed to absorb 9.20 MJ of energy (in form of heat) if the temperature of the sodium is not to increase by more than 10.0'C?
Define what is the ratio of TRIS base to TRIS acid at the start of the experiment? Define what is the ratio at the end of the experiment. What is the final pH
Question- Why would the concentration of silver ion be lower if we dissolved sodium chloride before dissolving silver chloride?
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