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There are two samples, labeled A and B. Sample A is a physical mixture of GaP and GaAs in a 1:1 mole ratio. Sample B is a GaP0.5As0.5 solid solution. Are samples A and B distinguishable by elemental analysis, X-ray diffraction, absorption spectroscopy or emission spectroscopy? Give a one sentence explanation for each.
Determine the empirical formula and the molecular formula of the organic compound. empirical and molecular formula
The base solution was added to the acid solution but was not stirred while temperature measurements were made. Some of the base splashed out of the calorimeter while pouring
Name the chemical family of elements that is absent from Mendeleev's table. 2) Which 4 elements were missing from mendeleev's periodic table? atomic masses: 45, 68, 70, 180
An ideal gas mixture of 1.00g N2 and 3.0g He is placed in a 1.00L container at 30 °C. What is the partial pressure of He
A galvanic cell is constsructed with 2 Pt electrodes. The anode has 1 Molar solution AgNO3 The cathode has 1 M solution of Chromium nitrate explain what volume of O2 gas at STP would be released at the anode while the chromium is being deposited a..
Chemistry - Estimation of Mass Required in a Reaction, With the reaction, CaCO3+2Hcl->CaCl2+H2O+CO2. Using percent by mass what is the weight of HCl needed to react
a 1.5-kg copper block is given an initial speed of 4.0 ms on a rough horizontal surface. because of friction the block
What happened to the fabric strip when it was treated with the Test Identification Stain? How might this dye be used
The enthalpy of fusion of water is 6.0 kJ/mol and the heat capacity of ice is 36.5 J/mol C. How many kJ of heat is given off when 5 mol of liquid water at 0 °C is frozen to ice at !10 °C
Which one of the following pairs is a conjugate acid-base pair?
A quantity of CO gas occupies a volume of 0.34L at 1.9atm and 309K. The pressure of the gas is lowered and its temperature is raised until its volume is 2.0L . Find the density of CO under the new conditions.
How much PV work is done in kilojoules and what is the value of ^E in kilojoules for the reaction of 6.50g of acetylene at atmospheric pressure if the volume change is -2.80L
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