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A 1.00 × 10-6-g sample of nobelium, 254 No, has a half-life of 55 seconds after it is formed. What is the percentage of 254 /102No remaining at the following times?
5.0 min after it forms
1.0 h after it forms
If none of the available reagents can be used for this purpose, then identify another reagent from the table that could be used. For each reagent you've identified, write down a balanced chemical equation for the reaction that occurs.
Calculate the molarity and mole fraction of acetone in a 1.82 molality solution of acetone in ethanol. Density of acetone is .788 g/cm^3. Density of ethanol is .789 g/cm^3. Assume that the volume of acetone and ethanol add.
In an experiment, 0.32 mol H2 and 0.32 mol I2 are mixed in a 1.00-L container, and the reaction forms HI. If Kc = 49. for this reaction, what is the equilibrium concentration of HI?I2(g) + H2(g) 2HI(g)
Air is 21 mole percent oxygen, that is, 0.21 atm oxygen at 1 atm. Suppose the pH of the water is 3.69 and that the concentration of iron(II) in the water is 5.30x 10-5 M, what is the potential of the corrosion reaction under the above conditions a..
nitrosyl bromide decomposes according to the chemical equation below.2nobrg 2nog br2g1.00 atm of nobr is sealed in a
in the manufacture of nitric acid by the oxidation of ammonia the first product is nitricnbspoxide. the nitric oxide is
What is the value of the work when an external pressure of 750 torr expands a chamber from 2.2 liters to 9.7 liters? Please answer in units of J.
find out which of the given is a saturated hydrocarbon a ch2ch-chch2 b ch3-ch2-cch cch3-ch2-ch2-ch3 dch3-chch-ch3 also
If the quantity of heat calculated in part (b) could be transferred with 100% efficiency to water, what volume of water, in liters, could be heated from 8.6 to 60.0 degrees C as a result
A buffer solution of a weak base as well as its salt had a pH of 9.45 when the base was 0.110 M and the cation was 2.00 M. Compute the equilibrium dissociation constant (Kb).
certain anesthetic contains nbspcho by 64.9 13.5 21.6 nbspby mass. determine the molecular formula of the compound at
What is the volume of the balloon?
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