At 20°C, the salt solution with a solute content of 5%(mass fraction) of 100 g is treated as follows, and the solution in which the solute content increases every time is fully dissolved 1) After evaporating 10g of water, the mass fraction of solute is? 2) After adding 10g NaCl, the mass fraction of solute is? At 20°C, the salt solution with 100g solute content of 5% is treated as follows, and the solution with increasing solute content in the solution is completely dissolved 1) After evaporating 10g of water, the mass fraction of solute is? 2) After adding 10g NaCl, the mass fraction of solute is?

At 20°C, the salt solution with a solute content of 5%(mass fraction) of 100 g is treated as follows, and the solution in which the solute content increases every time is fully dissolved 1) After evaporating 10g of water, the mass fraction of solute is? 2) After adding 10g NaCl, the mass fraction of solute is? At 20°C, the salt solution with 100g solute content of 5% is treated as follows, and the solution with increasing solute content in the solution is completely dissolved 1) After evaporating 10g of water, the mass fraction of solute is? 2) After adding 10g NaCl, the mass fraction of solute is?

1.100G*5%/(100g-10g)=5.56%
2.(100G*5%+10g)/(100g+10g)=13.6%

What is the valence of chlorine in CLO2? What is the mass fraction of the oxygen element

According to the positive and negative valence algebra is zero, the valence of Cl is +4
The mass fraction of oxygen element is 32/(32+35.5)=47.71%