A balloon filled with helium gaz occupiea 2.50 L at 25°C and 1.00 atm. When released it rizez to an altitude where the temperature iz 20°C and the prezzure is only 0.80 atm.
Calculate the new volume of the balloon.
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L

Calculate the mass percent of hydrogen in methyl acetate

There are 6.022 x 10^23 atoms of hg in 1 mole of hg. the number of atoms in 4.5 moles of hg can be found by multiplying 4.5 by 6.022 x 10^23 a. 2.7 x 10^24 b. 27 x 10^23 c. 2.71 x10^24 d. 27.099 x 10^23

What are the major products produced in the combustion of c10h22 under the following conditions? write balanced chemical equations for each. a. an excess of oxygen b. a slightly limited oxygen supply c. a very limited supply of oxygen d. the compound is burned in air