There are ten dL in one litre, so an ideal amount of lead in a litre of blood would be no greater than 400 micrograms (ug)
There's 1000mL in a litre, so we're looking at 0.4ug of lead or less in a millilitre. 1mol of lead atoms weighs about 207.2g, therefore there's about 2.907 × 10^21 atoms per gram, or about 1.163×10^14 atoms in 0.04ug. Therefore there should be no more than 1.2×10^14 atoms of lead per millilitre.
Answer:
Comets are made of ice, dust, and rocky material. Asteroids are made of rock and metal material.
Explanation:
thats how they are different from each other
Answer:
![198.01~mg~of ~theobromine](https://tex.z-dn.net/?f=198.01~mg~of%20~theobromine)
Explanation:
For this case we have to go through molecules to moles, from moles to grams and finally from grams to mg. The ratios that we have to take into account are:
-) <u>1 mol = 6.023x10^23 molecules</u>
-) The molar mass of
<u>180.16 g = 1 mol</u>
-) <u>1 g= 1000 mg</u>
With this in mind we can do the calculation:
![6.62x10^2^0~molecules\frac{1~mol}{6.023x10^2^3~molecules}\frac{180.16~g}{1~mol}\frac{1000~mg}{1~g}=198.01~mg~of ~theobromine](https://tex.z-dn.net/?f=6.62x10%5E2%5E0~molecules%5Cfrac%7B1~mol%7D%7B6.023x10%5E2%5E3~molecules%7D%5Cfrac%7B180.16~g%7D%7B1~mol%7D%5Cfrac%7B1000~mg%7D%7B1~g%7D%3D198.01~mg~of%20~theobromine)
NaHCO₃ + H⁺ = Na⁺ + H₂O + CO₂
n(NaHCO₃)=n(H⁺)
m(NaHCO₃)=M(NaHCO₃)n(NaHCO₃)=M(NaHCO₃)n(H⁺)
p=$m(NaHCO₃)=$M(NaHCO₃)n(H⁺)
p=9.20$/kg×84.0kg/kmol×10⁻³kmol=0.7728$
p≈0.77$
Answer:
80°C
Explanation:
because I'm mixed temperature of watere