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General Chemistry
A photon of 498nm was emitted from a silicon atom. Calculate the energy of all the atomic levels of silicon and show that the atomic levels are quantized.
General Chemistry
A compound has the following percent composition 28.03%Mg, 21.60%Si, 1.16%H and 49.21%O with a molar mass of 520.8g/mol. Determine the empirical and molecular formula of the compound (Si:28, Mg:24, H:1, O:16)
General Chemistry
How many grams of HNO3 are in 75ml of a 8.0m HNO3 solution
General Chemistry
An ionic bond is formed between two ions which of the following has no effect on the strength of bond?
1-doubling charge on both ions
2-doubling temperature
3-doubling radii of both ions
1-doubling charge on both ions
2-doubling temperature
3-doubling radii of both ions
General Chemistry
Which of the following has largest dipole moment
1-carbon tetrachloride
2-cis stlbene
3-trans stilbene
4-cis dichloroethylene
1-carbon tetrachloride
2-cis stlbene
3-trans stilbene
4-cis dichloroethylene
General Chemistry
17.09g/L to mg/L
General Chemistry
A sheet of aluminum foil has a length width and height of 8.47 CM, 8.8 CM, and 0.00150 CM, respectively. Aluminum has a density of 2.70 G/CM cubed. What is the mass in grams, of the foil
General Chemistry
How many grams of ethyl alcohol are in 1 fluid ounce (=30ml) bourbon if the concentration of ethyl is 35.6%(w/v)
General Chemistry
Prepare a solution of 1M iodine in 250mls of water. Molar 126.2g/mol
General Chemistry
How much MgSO4.7H2O are in 75ml of a 8.0M HNO3 solution?
