Answer:
1.0 and -13 is your answers
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:
About 96 grams per mole
Explanation:
The chemical formula of ammonium carbonate is . This means that breakdown of moles of atom per mole of molecule is:
2 moles of nitrogen, with a molar mass of around 14
8 moles of hydrogen, with a molar mass of around 1
1 mole of carbon, with a molar mass of about 12
3 moles of oxygen, with a molar mass of about 16
The molar mass of ammonium carbonate is therefore:
2(14)+8(1)+1(12)+3(16)=28+8+12+48=about 96
Hope this helps!
They start to move around really fast
Q = mCΔT
Q is heat, m is mass, C is specific heat, and ΔT is change in temp
Q = (50g)(.21)(500 degrees) = 5250 calories