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What is the maximum number of electrons in an atom whose highest-energy electrons have the principal quantum number n=5?
Observe while adding 0.5 mL of 6M HCl to 1 mL samples of the anion solutions and then add 5 drops of 0.1M barium nitrate and observe again.
At equilibrium, the concentrations in this system were found to be [N2]=[O2]=0.100 M and [NO]=0.400 M. N2(g)+O2(g) 2NO(g) If more NO is added, bringing its concentration to 0.700 M, what will the final concentration of NO be after equilibrium is r..
a 35.00 mL sample of NaOH solution is titrated to an endpoint of 14.76 mL 0.4122 M HBr solution. What is the molarity pf the NaOH solution?
The molar enthalpy of vaporization of carbon disulfide is 26.74 kJ/mol, and its normal boiling point is 46°C. What is the vapor pressure of CS2 at 0°C
Given that the atomic mass of carbon is given as 12.0107 g/mol, what are the approximate relative abundances of the two isotopes 12C and 13C?
A buffer solution was prepared by adding 4.95 g of sodium acetate, NaCH3CO2, to 2.50 x 10^2 mL of 0.150 M acetic acid, CH3CO2H. What is the pH of the buffer?
Word equations and balanced chemical equations for the burning of carbon and burning of sulphur
I don't understand don't we draw a lewis structure first and add 2 lone pairs to complete the octet making it a tetrahedral. how does it only have 3 covalent bonds
which ions in water make it 'hard'? is it possible to test for only one of these ions quantitatively in the presence of the other.
Determine the volume of 0.220 M KOH solution required to neutralize each of the following samples of sulfuric acid. The neutralization reaction is:
Calculate the theoretical yield of aspirin obtained when 2.0 g of salicylic acid and 5.0 mL of acetic anhydride (density = 1.08 g/mL) are mixed together. (Molar masses: acetic anhydride = 102.1 g/mol; salicylic acid = 138.2 g/mol)
An element crystallizes in a body-centered cubic lattice. The edge of the unit cell is 3.06 , and the density of the crystal is 7.01. Calculate the molar mass (in g/mol) of the element.
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