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How many grams of HNO3 are in 75ml of a 8.0M HNO3 solution?
Write the chemical symbols for three different atoms or atomic cations with 18
electrons.
Complete the last two columns given the data already present in the table. A researcher wishes to determine how the water absorption capacity of sodium polyacrylate varies as a function of lithium-io
he equations used in this experiment would have to be modified slightly if an acid with Ka of 1.0x10^-3 or greater were used as an unknown. Assuming such a situation, explain the problems that would
The isotopic makeup of an element is determined by Mass Spectrometry, a method for
measuring the atomic masses and abundances of atomic-scale particles very precisely.
Silicon-28 was analysed in a Mass Spectrometer and a ratio of 2.331411 was
obtained. Determine the atomic mass of silicon-28.
The isotopic makeup of an element is determined by Mass Spectrometry, a method for
measuring the atomic masses and abundances of atomic-scale particles very precisely.
Silicon-28 was analysed in a Mass Spectrometer and a ratio of 2.331411 was
obtained. Determine the atomic mass of silicon-28.
a, what was the mass of carbon and hydrogen in the sample.
b, Assuming that the original sample contained only carbon,hydrogen and oxygen. What was the mass of oxygen in the sample.
c,what was the mass percentage of oxygen in the sample
d, what is the empirical fomula of benzaldehyde.
a line with a wavelength of 486.4 nm was observed in the Balmer series of the emission spectrum of hydrogen. Determine the initial and final values of the energy levels associated with this emission
- A sealed container contains nitrogen gas. Use the kinetic theory to explain what happens to the pressure inside the container when the temperature is increased.
For a reaction at equilibrium, ∆ Suniv = 0.
- True
- False
