how to calculate the percent of carbon-14 remaining after one half-life?
606739
Explanation: After 1 half-life, 12 of the C-14 would remain. After 2 half-life, 12 of the 12 of the C-14 = 14 of the C-14 would remain.
1225239
['To figure the total kinetic energy, you multiply the average kinetic energy by the number of molecules you have, which is nNA, where n is the number of moles:', 'NAk equals R, the universal gas constant, so this equation becomes the following:']
198060
['Normal values: HCO3: 22-26 meq/L. PCO2: 35 - 45 mmHg. pH: 7.35 - 7.45. ... ', 'Quick derivation: Carbonic acid (H2CO3) equilibrium: [H+] x [HCO3-] <---> [H2CO3] <---> [CO2] x [H2O] [H+] x [HCO3-] = K x [CO2] x [H2O] ... ', 'Final: pH = 6.1 +log (HCO3-/ (0.03 x PCO2))']
1335182
Grams will cancel out and give us moles. Whenever you divide that over, that will be 0.615 moles of carbon-13 atoms.
1439421
We will divide their weight with the total weight of CO2. % C = 12.01/44.01 = 0.2729= 27.29% (we will divide 0.2729 with 100 to take the percentage). % O = 32.00/44.01 =0.7271 =72.71 %O in CO2.
1165253
['Nitrogen (N2) - 78.084%', 'Oxygen (O2) - 20.9476%', 'Argon (Ar) - 0.934%', 'Carbon dioxide (CO2) 0.0314%']
1437769
['Well, the maximum number of hydrogen atoms for "c" carbon atoms is 2c+2 (think of the formulae of saturated hydrocarbons such as ethane, propane etc).', 'From this maximum number, subtract the "h" hydrogen atoms that you have.']
20929
the mass of each element = the percent given. Convert the mass of each element to moles using the molar mass from the periodic table. Divide each mole value by the smallest number of moles calculated. Round to the nearest whole number.
742339
Percentage composition of elements in compounds. and % carbon in C6H12O6 = 72.06 × 100 % = 40.0 % by mass.
846735
['Find Mass in Grams. Calculate the mass in grams of each reactant. ... ', 'Find Atomic Weight. Determine the atomic weight of each element using the periodic table. ... ', 'Calculate Grams per Mole. ... ', 'Divide Grams by Grams per Mole. ... ', 'Find Reaction Coefficients. ... ', 'Determine Limiting Reactant. ... ', 'Determine Product Mass. ... ', 'Compare Reaction Results.']
411925
Molar Mass (g/mol) One mole of carbon still has 6.022 × 1023 carbon atoms, but 98.89% of those atoms are carbon-12, 1.11% are carbon-13, and a trace (about 1 atom in 1012) are carbon-14.
874201
Subtract the charge from the atomic number if the ion is positive. If the charge is positive, the ion has lost electrons. To determine how many electrons are left, subtract the amount of charge from the atomic number. In this case, there are more protons than electrons.
1135712
['Find and name the longest continuous carbon chain.', 'Identify and name groups attached to this chain.', 'Number the chain consecutively, starting at the end nearest a substituent group.', 'Designate the location of each substituent group by an appropriate number and name.']
1286611
['percentage yield = (actual yield ÷ theoretical yield) × 100. ... ', 'Calculate the theoretical yield of NH3 (the mass of NH3 produced as predicted by the balanced chemical equation for the reaction) ... ', 'Calculate the actual yield:']
468208
question_answer 1) Calculate the mass percentage of benzene (C6H6) and carbon tetrachloride (CCl4) if 22 g of benzene is dissolved in 122 g of carbon tetrachloride. Answer: Mass of solution = Mass of benzene + Mass of carbon tetrachloride = 22 g + 122 g = 144 g Mass percentage of benzne = 15.28%.
1424025
Using the half-life, it is possible to predict the amount of radioactive material that will remain after a given amount of time. C-14 dating procedures have been used to determine the age of organic artifacts. Its half-life is approximately 5700 years.
660166
The pH at the half-titration point is equal to the pKa of the weak acid, BH+. To get the pKb of the base (B) you MUST subtract the pKa from 14. The reason for this is that the pOH is actually what equals the pKb.