Answer:
6.2 g
Explanation:
<em>The mass of oxygen gas produced from 8.5 g CO2 would be </em><em>6.2 g</em><em>.</em>
First, let us look at the equation of the reaction:
From the equation, 6 moles of CO2 are required to produce 6 moles of O2.
<em>Recall that: </em><em>mole = mass/molar mass</em>
8.5 g of CO2 = 8.5/44.01 = 0.1931 mole of CO2
Since the ratio of CO2 to O2 is 1:1, 0.1931 moles of CO2 will produce 0.1931 moles of O2.
Hence, mass of oxygen produced = mole x molar mass
= 0.1931 x 32
= 6.2 g <em>to 2 significant digits.</em>
First we have to write balanced chemical equation:
CuSO₄.5H₂O + 4 NH₃ → [Cu(NH₃)₄]SO₄.H₂O + 4 H₂O
then calculate the molar mass of both CuSO₄.5H₂O and [Cu(NH₃)₄]SO₄.H₂O
MM CuSO₄.5H₂O = 249.612 g/mole
MM [Cu(NH₃)₄]SO₄.H₂O = 245.612 g/mole
from equation we see that:
1 mole CuSO₄.5H₂O ---gives ---> 1 mole [Cu(NH₃)₄]SO₄.H₂O
249.612 g ---gives ---> 245.612 g
? grams ---gives ---> 6 g complex
By cross multiplication we get that:
mass of CuSO₄.5H₂O required = 6.1 g
when an atom gains or loses an electron, it becomes an ion. Ions formed by the loss of an electron have a positive charge, and those formed by gaining an electron have a negative charge. Positive ions are called cations, and negative ions are called anions.
Bonjeur monseur, la french are here! it seems you have a problem with the elements on earth. lead seems correct since it is indeed a harmful material
