Mass of 1 Da (5 1 unified atomic mass unit 5 1 u) in grams. The mean of 60 measurements of the mass of individual E. coli cells vaporized by MALDI and measured with a quadrupole ion trap was 5.03 (60.14) 3 1010 Da.2 Express this mass in femtograms.

The covalent compound acetylene, which is the fuel of the oxyacetylene torch used by welders, has the molecular formula c2h2. the covalent compound benzene, a commercial solvent, has the molecular formula c6h6 each of these covalent compounds contains carbon and hydrogen atoms in a one-to-one ratio. would it be correct to write the chemical formulas of each as ch? explain.

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Uranium can supply energy for the worlds electricity without admitting harmful greenhouse gases which of these statements best describes an outcome of uranium mining