Yes, a compound is a type of matter.
Answer:
0.852 mol
Explanation:
First we <u>convert 4.00 g of helium (He) into moles</u>, using its <em>molar mass</em>:
4.00 g ÷ 2 g/mol = 2 mol He
To answer this problem we can use<em> Avogadro's law</em>, which states that at constant pressure and temperature:
V₁n₂=V₂n₁
Where:
We <u>input the data</u>:
- 24.4 L * n₂ = 10.4 L * 2 mol
And <u>solve for n₂</u>:
Answer:this is thermal decomposition
Explanation:
the light green copper carbonate when heated it gives copper oxide ( a black residue) and carbon dioxide is evolved
Answer:
72.67g of B
Explanation:
The reaction of B₂O₃ to produce boron (B), is:
B₂O₃ → 3/2O₂ + 2B
<em>That means B₂O₃ produce 2 moles of boron</em>
Molar mass of B₂O₃ is 69.62g/mol. 234g of B₂O₃ contains:
234g B₂O₃ ₓ (1mol / 69.62g) = 3.361 moles of B₂O₃.
As 1 mole of B₂O₃ produce 2 moles of B, Moles of B that can be produced from B₂O₃ is:
3.361mol B₂O₃ ₓ 2 = <em>6.722 moles of B</em>.
As molar mass of B is 10.811g/mol. Thus mass of B that can be produced is:
6.722mol B ₓ (10.811g / mol) = <em>72.67g of B</em>
