If the oxygen is replaced by helium at the same temperature, how many kilograms of the latter will be needed to produce a gauge pressure of 7. 10 atm?.

The correct answer would be b) volume versus temperature, because they are also directly proportional.

Answer-ide.

Answer: 1s²  2s²  2p⁶explanation: from the periodic table, we can note that the neutral fluorine  has 9 electrons (symbol is shown in the attached image)therefore, the configuration of neutral fluorine  is: 1s²  2s²  2p⁵now, f⁻  means that the neutral fluorine  gained one extra electron. this means that f⁻  has 10 electrons.the extra electron will occupy the 2p level to make it complete.the configuration now  is: 1s²  2s²  2p⁶comparing between both f and f⁻, we can note that f⁻  has now complete orbitals which means that it is more stable than f based on lewis postulatehope this : )

Answer:     c. lso₄======since cl has an ion charge of -1, the formula    tells us that l has an ion charge of +2 because we needed two chloride ions to fully empty out the valence shell of l, hence the 1: 2 ratio of l to cl.  each chloride ion needs only 1 electron to fully fill their valence shells.since so₄ has an ion charge of -2, it will accept two electrons to get a full valence shell. we established that l has an ion charge of +2. these charge numbers are the same; l will provide the two electrons needed. it's a 1: 1 ratio between l and so₄the formula would therefore be lso₄