How many grams of hydrogen are needed to produce 1.80g of water according to this equation?
2h2+o2 to 2h2o

0.2g of hydrogen is needed to produce 1.80g of water

Explanation:

No. of moles of water

From given values,

Weight of water

Molecular weight of water

No. of moles of water

From equation, it is clear that 2 moles of water can be formed by 2 moles of

Hence, 0.1 mole of water can be formed from 0.1 mole of

Now,

No. of moles of

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.

if the temperature drops and becomes cool

then the atmosphere can be freezing as the water vapor in the air is at maximum (100%) and can be severely cold

also can be snowing lightly as the moisture in the air will start to solidify

and btw this is not chemistry but