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Write the empirical formula of at least four binary ionic compounds that could be formed from the following ions: Ca^2+, Cr^4+, Cl^-, S^2-
In 2C4H10+13O2->8CO2+10H20 how many moles of O2 are required to react completely with 4.4 Moles of C4H20?
Estimate the temperature where ?G=0 for the following reaction: (giving ?H= -176 kJ, and ?S= -284.5 J/K) CAUTION Beware of units. NH3(g)+HCl(g)--->NH4Cl(s)
you measure 2.34 grams of potassium dichromate k2cr2o7 into a volumetric flask. you dilute the potassium dichromate
How many grams of the products are produced by the oxidation of C7H14O3 by potassium permanganate in acidic solution (HCl is the acid) when you start with 25.65494 g of C7H14O2 and stoichiometric amounts of potassium permanganate
What is the absolute pressure when the mass of the substance on a dead weight gauge is 20 kg, and the inner diameter of the cylinder is 2 cm? Assuming the g=9.82 m/s2 and the atmosphere pressure is 745 torr
A brewery has a horizontal conveyor belt to transfer malted barley from a storage silo to the mash tun (the large vessel where the malted barley is steeped in hot water)
You have samples of two different compounds, CH3OCH3 and CH3CH2CHO. which ONE of these tests can be used to distinguish between the pair of compounds shown above. 1. heptane/water solubility 2. dilute HCl 3. H2CrO4 4. NaHCO3 solution 5. Br2 in CH3..
referring to the heating/cooling curve of a pure substance. Identify the line segment on the following diagram where the specific heat of the liquid is used to calculate energy flow
A gas sample containing 1.65 mol at 25°C exerts a pressure of 413 torr. Some gas is added to the same container, and the temperature is increased to 50.°C.
A solution is prepared by mixing 75.0 mL of 0.020 M BaCl2 and 125 mL of 0.040 M K2SO4. What are the concentrations of barium and sulfate ions in this solution. Assume only SO4^-2 ions (no HSO4-) are present
Lucas Test. For each compund, drae its structure and note the amount of tome it takes for the soultion to become cloudy
What you observed upon the addition of NH3(aq) to magnesium chloride solution / what species are present in the test tube?and what happened when we add NH4Cl? Explain this observation with respect to the equilibrium reactions that exist in the test..
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