the answer is i have a pig brain and bigger pp
This problem is requiring us to find the half life of the element. We can solve this problem by using the equation
as shown: A=Aoe^-(ln2/t)T where A is the final amount (5 kilogram), Ao is
the initial amount (40.0 kilogram), t is the half-life (required) and lastly T
time elapsed (4.0 years). Plug in the values in the equation and you should
get 1.33 years as the half life.
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Answer: a. 3.0 moles of water
Explanation:
According to stoichiometry,
2 moles of hydrogen combine with 1 mole of oxygen.
Thus 3 moles of hydrogen combine = moles of oxygen.
Thus hydrogen is the limiting reagent as it limits the formation of product and oxygen is the excess reagent as it is present in excess. (1.8-1.5)= 0.3 moles of oxygen will be left as such.
If 2 moles of hydrogen produce = 2 moles of water
3 moles of hydrogen will produce =moles of water.
The milk has a mass concentration of 17 g/l of fat.
I believe it’s 39.0 if I’m not mistaken.