<span>In order to determine the mass of the piece of copper with only knowing it's density, it must have it's volume measured. In order to do this, the piece of copper could be placed in a container filled to the brim with a spout and a graduated cylinder below the spout. Then the piece of copper can be placed into the container without any fingers in the water. Then water will displace into the cylinder, the measured volume is the volume of the piece of copper, because of Archimede's principle, and we assume that the water is 1.0 g/mL or 1 g/cm^3. Then multiply the density with the volume to get the mass of the piece of copper.</span>
Answer is: quantity of sulfur is 13 tons.
Chemical reaction: S(s) + O₂(g) → SO₂(g).
From chemical reaction: n(S) : n(SO₂) = 1 : 1.
n(S) = n(SO₂); amount of substance.
m(S) ÷ M(S) = m(SO₂) : M(SO₂).
m(S) : 32 g/mol = 26 t : 64 g/mol.
m(S) = (32 g/mol · 26 t) ÷ 64 g/mol.
m(S) = 13 t = 13000 kg; mass of sulfur.
The correct answer is 2Ca(s)+O_2(g)→ 2CaO(s).
Combustion of calcium in air calcium is Ca with O_2 (air)
Thus the equation is:
2Ca(s)+O_2(g)→ 2CaO(s)
Calcium and oxygen react at room temperature to generate a thin layer of CaO that shields the metal from further oxidation. When burned, calcium may ignite and react with both oxygen and nitrogen to produce calcium oxide (CaO) and calcium nitride (Ca3N2).
What is combination reaction ?
A chemical reaction known as a "combination reaction" occurs when two or more reactants combine to create a single product. Such a kind of reaction does not produce any byproducts. These processes are typically exothermic, which means heat is produced.
To learn more about combustion refer the link:
brainly.com/question/9641392
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