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Please explain. An element has the following natural abundances and isotopic masses: 90.92% abundance with 19.99 amu, 0.26% abundance with 20.99 amu, and 8.82% abundance with 21.99 amu. Calculate the average atomic mass of this element.
A 7.0 g sample of a hydrocarbon (a molecule that has only hydrogen and carbon) is subject to combustion analysis. The mass of CO2 collected is 22.0 g. What is the empirical formula of the compound?
An unknown alcohol of molecular formula C4H10O forms only one alkene when treated with sulfuric acid. No reaction is observed when the alcohol is treated with oxidizing reagent. Draw the structure of the alcohol.
draw the lewis dot structures for the following molecules:
If a segment of DNA consists of 5'-TCTAGC-3', the nucleotide order in the complementary mRNA strand (written in 5' to 3') would be:
the rate constant for the equation2c2f4 -gt c4f8is 0.0406 m-1 s-1. we start with 0.236 mol c2f4in a 3.00-liter
In a graph(Energy (kj/mol)) the first five ionization energies of an atom are IE1, IE2, IE3, IE4, and IE5. what is the element symbol and its complete electron configuration for
Without first writing a full molecular or ionic equation, write the net ionic equations for any precipitation reactions that occur when aqueous solutions of the following compounds are mixed.
Archaeologists use the year 1950 as the date of the present. So 1000 bc is 2950 B.P. (before the present). An archaeologist finds that the carbon-14 content of a wooden needle is 11% of that of trees living today.
What is the name of the product that results when 4-methylcyclohexane is treated with 2% ethnolic PBP solution
if an iron scoopula instead of a plastic one is used to add unknown metal to hcl solution will it affect the calculated
Find delta s, q,w, and delta u for the reversible isothermal expansion of 3.000mol of argon (assumed ideal) from a volume of 100.0L to a volume of 500.0L at 298.15K
Question- Calculate the specific heat of a metal is 46.0 g of the metal at 78.0 degrees C warms 32.0 g of water at 23.1 degrees C to 36.1 degrees C.
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