Chemistry, 08.10.2019 03:10, robert7248
Amixture of methane and air is capable of being ignited only if the mole percent of methane is between 5% and 15%. a mixture containing 9.00 mole% methane in air flowing at a rate of 700.0 kg/h is to be diluted with pure air to reduce the methane concentration to the lower flammability limit. calculate the required flow rate of air in mol/h and the percent by mass of oxygen in the product gas. (note: air may be taken to consist of 21.0 mole% o2 and 79.0 mole% n2 and hence to have an average molecular weight of 29.0).
Answers: 3
Chemistry, 22.06.2019 03:30, acaciacoats
The atomic radius of sodium is 186 pm and of chlorine is 100 pm. the ionic radius for na+ is 102 pm and for cl– is 181 pm. in going from na to cl in period 3, why does the atomic radius decrease while the ionic radius increases? a. the inner electrons in the sodium cation shield its valence electrons more effectively than the inner electrons in the chloride anion do. b. the inner electrons shield the valence electrons more effectively in the chlorine atom than in the chloride anion. c. the outermost electrons in chloride experience a smaller effective nuclear charge than those in the sodium cation do. d. the outermost electrons in chloride experience a larger effective nuclear charge than those in the sodium cation do. e. monatomic ions are bigger than the atoms from which they are formed.
Answers: 2
Chemistry, 22.06.2019 06:30, themajesty9898
The minerals found in bones are deposited by living cells called
Answers: 1
Chemistry, 22.06.2019 21:00, rhondafits9000
Which property of water causes water drops to bead on a freshly waxed car?
Answers: 2
Amixture of methane and air is capable of being ignited only if the mole percent of methane is betwe...
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