Answer:
(d) Na₂CO₃ + CuSO₄ → Na₂SO₄ + CuCO₃
Explanation:
Chemical reaction:
Na₂CO₃ + CuSO₄ → Na₂SO₄ + CuCO₃
This is metathesis reaction. It is also called double displacement reaction. The cation and anions of both reactants exchange with each others.
The cation (Na⁺) of sodium carbonate is exchange with cation (Cu²⁺) of copper sulfate and form sodium sulfate and copper carbonate.
Double replacement:
It is the reaction in which two compound exchange their ions and form new compounds.
AB + CD → AC + BD
<h3>
Answer:</h3>
16.30 %
<h3>
Explanation:</h3>
- The percent by mass is calculated by dividing the mass of solute by the mass of solution and then multiplying by 100.
- That is. Percent by mass = (Mass of solute/Mass of solution) × 100
In this case;
Mass of solute = 14.60 g
Mass of solvent = 74.95 g
But, Mass of solution = mass of solute + mass of solvent
Thus;
Mass of solution = 14.60 g + 74.95 g
= 89.55 g
Therefore;
% mass = (14.60 ÷ 89.55 g) × 100%
= 16.30 %
Hence, the mass percent is 16.30%
Size
The Sun is 1,390,000 km in diameter. That compares with 12,756 km for diameter of the Earth. In other words, the diameter of the Sun is over 100 times the diameter of the Earth.
In June, 2004, Venus passed in front of the Sun, as seen from the Earth. Since the diameter of Venus is only slightly less than that of Earth (12,104 km)
Mass
The mass of the Sun is about 2 x 1030 kilograms (2 followed by 30 zeros). It is one of the larger stars in our Milky Way galaxy. The median size of stars in our galaxy is less than half the mass of the Sun. In comparison, the Earth is 6 x 1024 kg. This means that the mass of the Sun is over 300,000 times greater than that of the Earth.
other than its Big,Orangish-yellowish, round like a ball, and extremly hot