Answer:
1460 red Lego bricks will be sufficient for 10 kg child to consume to reach the LD-50 threshold.
Explanation:
Average mass of a Lego brick = 2.50 grams
Amount of cadmium in 1 gram of red lego brick = 274 μg =
1 μg =
Amount of cadmium in 2.50 grams of lego brick :
LD-50 for cadmium = 100 mg/kg
For a 10.0 kg child the amount of cadmium that will be lethal :
1 g = 1000 mg
Let the number of red Lego bricks ingested by the child to reach the LD-50 threshold be x.
x × (Amount of Cd in single 2.50 g red lego brick) = 1g
1460 red Lego bricks will be sufficient for 10 kg child to consume to reach the LD-50 threshold.
Answer:
0.198kg
Explanation:
because,
1kg = 1000g
so
198g = 0.198g
divide it by 1000 to get kg
Hey,
Answer:
<em>AgCl</em><em> </em>(Silver Chloride)
Explanation:
sodium chloride + silver nitrate → sodium nitrate+ silver chloride
Hope it helps :)
Have a great day!
Answer:
Explanation:
Part (c)
Mix together two suitable solutions.
Use filtration to separate the precipitate as a residue from the solution.
Wash the precipitate with distilled water while it is in the filter funnel.
Leave the washed precipitate aside or in a warm oven to dry.
Part (d)
Pb(NO3)2 (aq) + Na2SO4 (aq) → 2 NaNO3 (aq) + PbSO4 (s)
The electron configuration for Oxygen would be 1s2 2s2 2p4
A = 1
B =2
C =4.
Here are the values.