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A sample of iron was heated to 125.0 degrees Celsius, then placed into 375 g of water at 19.8 degrees Celsius. The temperature of the water rose to 25.6 degrees Celsius. How many grams of iron were in the sample?
hydrogen peroxide decays into water and oxygen in a first-order process. please show me the steps to get
To the same RNA solution, we added an equimolar amount of an RNA binding protein that binds to that RNA specifically. The protein has a molecular weight of 100,000 and contains 10 Trp and 10 Tyrosine residues
Calculate the freezing point of 0.15 m calcium chloride aqueous solution. Assume that the molal freezing point depression constant of water is 1.86°C•kg/mol and that the freezing point of water is 0.00°C.
1 liter of sodium carbonate 0.4 M is added to 1 liter HCl 0.3 M what is the excess material and how many moles remains?
the density of aluminum is 2.70 gcm3. a piece of foil that is 10.00 cm on each side has a mass of 440. mg. how thick is
(a). What is the trend in electronegativity going from left to right in a row of the periodic table? (b) How do electronegativity values generally vary going down a column in the periodic table?
when atoms of the hypothetical element x are placed together they rapidly undergo reaction to form the x2nbspmoleculea.
Explain what are the two modes for addition of hydrogen to 2-butyne. Label them cis & trans as well as E & Z
What is molality of a 1.22 M solution of sugar (C12H22O11)? The density of the solution is 1.12 grams/ml 2- Which of the following in each pair with be more soluble in water?
Consider the chemical reaction 2NH3(g) N2(g) + 3H2(g). The equilibrium is to be established in a 1.0 L container at 1,000 K, where Kc = 4.0 ? 10-2. Initially, 1,220 moles of NH3(g) are present. Estimate the equilibrium concentration of H2(g).
Ethyl acetate can be prepared from ethanol as the only organic starting material.
Problem- A 7.50 L container holds a mixture of two gases at 35 degrees C. The partial pressures of gas A and gas B, respectively are 0.383atm and 0.805 atm. If 0.240 mol a third gas is added with no change in volume or temperature what will the to..
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