3 NO2 + H2O --> 2 HNO3 + NO. If 25 grams of nitrogen dioxide reacts in an 5 poin excess of water, what mass of HNO3 will be produced?
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False, as a substance changes from a solid to a liquid and from a liquid to a gas the molecules get farther apart from each other

1.75 is the weight of one medium egg

Answer : option a) 84explanation :

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.

Idont know. if you want an answer you need to give us some context dude.