The mass of substance consumed in g to provide a lethal dose is 62.496 g
The substance has an LD50 of 336 mg/kg. We require the number of grams of the substance that a 186 kg person would consume to reach the probable lethal dose.
So, mass of substance consumed = lethal dose × mass of person
lethal dose = 336 mg/kg and mass of person = 186 kg
mass of substance consumed = lethal dose × mass of person
mass of substance consumed = 336 mg/kg × 186 kg
mass of substance consumed = 62496 mg
Converting to g, we have
mass of substance consumed in g = 62496 mg × 1 g/1000 mg = 62.496 g
So, the mass of substance consumed in g to provide a lethal dose is 62.496 g
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First balance the equation: you get 3Fe + 4H2O = Fe3O4 +4H2O
Then set up the equations according to the spidey map below.
x 10^25 molec. H2O/ 1 x x x
Multiply the top all together, then divide by the whole bottom half.
Answer: 154.4 g H2
136 g Fe /1 x x x
Multiply the top all together, then divide by the whole bottom half.
Answer: 4.95 x 10^20 Formula units (fu) Fe3O4
8.25 x 10^23 molec. Fe/ 1 x x
Multiply the top all together, then divide by the whole bottom half.
Answer: 1.83 mol H2
It is effected by diffusion (the power of smell and wind spread) but a solid is not.
Answer:
B.
Explanation:
Weather changes daily and varies in different areas around the world