I think it's black asphalt, brown soil, beige sand, white paper. I'm sorry if I'm wrong.
        
                    
             
        
        
        
Answer:
Solution is 4.67% by mass of salt
Explanation:
% by mass is the concentration that defines the mass of solute in 100g of solution.
In this case we have to find out the mass of solution with the data given:
Mass of solution = Mass of solute + Mass of solvent
Solute:  Salt → 14.2 g
Solvent: Water → 290 g
Solution's mass = 14.2 g + 290g = 304.2 g
% by mass = (mass of solute / mass of solution) . 100
(14.2 g / 304.2g) . 100 = 4.67 %
 
        
             
        
        
        
Answer:
Mg S2 O3 
Explanation:
.691 g of Mg  is .284 mole
1.84 g of S    is .5739 mole
1.365 g of O is  .8531 mole      you can see the ratio is ~  1 :2 :3 
                                                         Mg S2 O3 
 
        
             
        
        
        
Answer:
The answer is burning wood
Explanation: