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The gemstone called aquamarine is composed of aluminum, silicon, and oxygen.Aquamarine is the bluish crystal. It is surrounded by aluminum foil and crystalline silicon.
(a) What are the symbols of the three elements that combine to make the gem aquamarine?
(b) Based on the photo, describe some of the physical properties of the elements and the mineral. Are any the same? Are any properties different?
A sample of an unknown gas effuses in 14.7 min. an equal volume of h2 in the same apparatus under the same conditions effuses in 2.42 min. what is the molar mass of the unknown gas
The temperature in the stratosphere is -23 degrees celsius. Calculate the root-mean-square speeds of N2, O2, and O3 molecules in this region.
What volume of 3.50M H2S is required to react with excess O2 to produce enough NH3 to fill a cylinder that is 50ft long and has a diameter of 13 ft at a pressure of 450 torr and 20?F?
How many neighboring hydrogen atoms must the CH2 group (at 2.65 ppm H NMR ) of propyl amine see in order to have its signal split into a triplet
when b is added to a solution containing the ions of the other metals metallic A, C,.B. and d are formed. a reacts with 6 m hno3 but d does not select wihch represents the metals arranged in decreasing order as reducing agents
Use H2C4H4O4 to determine the concentration of NaOH, Which solution will you put in the buret and which solution will you titrate?
Ammonia can be made by reacting calcium cyanamide (CaCN2) with water as shown: CaCN2 + 3 H2O => CaCO3 + 2 NH3. How many grams of water are required to react with 212.9 g of calcium cyanamide
How many liters of air must pass over a sample of the compound at 25 degrees C to vaporize 1.0 mg of it
Calculate the number of ml of .0050M NaOH that will need to titrate 75.0ml of hydrochloric acid originally at a ph of 3.5
What approaches do we use to treat the inter electron repulsion part of the Hamiltonian for multi-electron atoms including helium and beyond.
Calculate the rate constant for a reaction at 500K whose activation energy is 24.0 kJ/mol and the prefactor is 4.11 x 10-1
Calculate the solubility (in moles/liter) of the salt MX in the presence of the common ion X- (concentration 1.90E-1 M) if the value of the solubility product constant Ksp for the salt is 1.00E-16.
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