The helium in a glass model is a gas
Answer:
The answer to your question is: 6 grams of hydrogen
Explanation:
Data
3.0 moles of hydrogen
1.5 moles of oxygen
3 moles of water
# of grams of hydrogen required to form 3 moles of water?
Equation
H₂ + 1/2 O₂ ⇒ H₂O
3 mole 1.5 moles 3 moles
Atomic weight of H₂ = 2 g
1 mole ----------------------- 2 g
3 moles --------------------- x
x = 3(2)/1 = 6 grams of hydrogens
Answer:
So, we rely on radiometric dating to calculate their ages. Radiometric dating, or radioactive dating as it is sometimes called, is a method used to date rocks and other objects based on the known decay rate of radioactive isotopes.
Explanation:
radiometric dating is a very accurate way to date the Earth.We know it is accurate because radiometric dating is based on the radioactive decay of unstable isotopes. When an unstable Uranium (U) isotope decays, it turns into an isotope of the element Lead (Pb).
Answer:
CaCl₂
Explanation:
First we <u>convert the given masses of elements into moles</u>, using <em>their respective molar masses</em>:
- 0.900 g Ca ÷ 40 g/mol = 0.0225 mol Ca
- 1.60 g Cl ÷ 35.45 g/mol = 0.045 mol Cl
Now we divide those numbers of moles by the lowest value among them:
- 0.0225 mol Ca / 0.0225 mol = 1
- 0.045 mol Cl / 0.0225 mol = 2
Meaning the empirical formula for the compound is CaCl₂.
Answer: mass and volume
Explanation:
Divide the mass by the volume in order to get an object's Density.
