The answer is C. Zn(s) + H2SO4(aq) ZnSO4(aq) + H2(g)
Answer:
Explanation:
1. First take the cylinder volume formula:
2. Then take the values for the radius and the height of the cylinder and replace them into the formula:
3. Solve the equation:
Answer: In a compound with molecular formula 
,the valency of Y and X are 2 and 3 respectively.
Explanation:
For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.
The given compound is where X and Y combine and their oxidation states or valencies are exchanged and written in simplest whole number ratios. Thus the oxidation state or valency of X is 3 and that of Y is 2.
Answer:
1.84 g/cm³
Explanation:
A flask has a mass of 78.23 g when empty and 593.63 g when filled with water. The mass of water is:
m(water) = 593.63 g - 78.23 g = 515.4 g
The density of water is 1.00 g/cm³. The volume of water (and the flask) is:
515.4 g × (1 cm³/1.00 g) = 515 cm³
When the same flask is filled with concentrated sulfuric acid, H₂SO₄, its mass is 1026.57 g. The mass of H₂SO₄ is:
m(H₂SO₄) = 1026.57 g - 78.23 g = 948.34 g
948.34 g of sulfuric acid occupy a volume of 515 cm³. The density of sulfuric acid is:
ρ = 948.34 g / 515 cm³ = 1.84 g/cm³
