Look on page 293 of your textbooks to fact check.The symbol for an alpha particle is 4/2 He.The super- script (4) is the mass number (the sum of the numbers of protons and neutrons).The subscript (2) is the atomic number (the number of protons).
Therefore the answer should be: Super-script 4 is the mass number, Subscript 2 is the atomic number
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Question: Given the balanced equation representing a reaction:
2H2 + O2 ==>2H2O
What is the total mass of water formed when 8 grams of hydrogen reacts completely with 64 grams of oxygen?
(1) 18 g (3) 56 g
(2) 36 g (4) 72 g
Answer:
"72 gram" is the total mass of water formed when 8 grams of hydrogen reacts completely with 64 grams of oxygen
Explanation:
We will do stoichiometry in this kind of problem:
Therefore, the total mass of water formed is 72 g.
Trihydrate - basically 3 molecules of water. Unless you're referring to the molecule 3H2O used in measuring the total body water in the case it tritiated water.
Answer:
Volumetric flow:
Mixture = 373.55 l/h; Benzene = 310.05 l/h; n-hexane = 63.5 l/h
Mass flow
Mixture = 317.52 kg/h; Benzene = 275.66 kg/h; n-hexane = 41.85 kg/h
Explanation:
First, we can express the mixture mass flow as
The volumetric flow of the mixture is
The mass balance can be written as
And the volumetric flow as
If fluid 2 is n-hexane, we have
The mass flow of n-hexane is 41.85 kg/h.
Its volumetric flow is 63.5 litre/h
The mass flow of benzene can be deducted by difference:
Answer:
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