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Suppose that there is 2.43 mol of nitrogen gas in an insulated, sealed 31.7-L container initially at 285 K. The specific heat of nitrogen gas is 1.04 kJ kg-1 K-1 (note units). If a 5.44-kg block of iron at 755 K is placed in this container and it is sealed again (with no loss of nitrogen), what is the fi nal pressure of the nitrogen gas?
you measure 2.34 grams of potassium dichromate k2cr2o7 into a volumetric flask. you dilute the potassium dichromate
the heat capacity of iron is 0.449 jgmiddotk. a blacksmith is hammering a 261 g horseshoe that has been heated to 1200
hydrogen gas is generated when calcium reacts with water. the volume of gas collected over water at 30 degree celcius and pressure of 988 mm Hg is 641 ml. what is the mass in grams of the hydrogen gas obtained? the pressure of water vapor at 30 de..
What symbol is used in a chemical equation to represent the following phrases? Select the symbol in blue and drag it into the appropriate bin
Use the Solubility Rules to write the dissociation equation when the ionic compounds are placed in water. If substances do not dissolve, state "no reaction" 1) magnesium chlorate
the content of manganese in steel was found using atomic absorption and the method of standard additions. a standard
An alloy of iron contains 75.0% iron and 25.0% other elements. How many grams of iron are present in 150. g of the alloy?
What is the pH (to nearest 0.01 pH unit) of a solution prepared by mixing 67.0 mL of 0.558 M HCl and 58.0 mL of 0.767 M NaOH
A flask contains 0.390 mol of liquid bromine, rm Br_2. Determine the number of bromine molecules present in the flask.
a 4.50-g sample of licl at 25.0 degc dissolves in 25.0 ml of water also at 25.0 degc . the final equilibrium
Calculate the pH of a solution that is 0.50 M in HF (Ka= 7.2 x 10-4) and 0.60 M in NaF. The answer is 3.22. Please show me how to get the correct answer.
The pKa of aspirin (acetyl salicylic acid) is about 3 while the pH of stomach acid is about 1.0 Circle the approximate proportion of ionized (deprotonated and charged for acid) to unionized (protonated and uncharged for acid) aspirin that would oc..
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