This compound is also known as Barium Carbonate. 1 mole is equal to 1 moles BaCO3, or 197.3359<span> grams.</span>
        
             
        
        
        
Moles= mass\ relative formula mass(Ar) 
moles of zinc= 7.9/30= 0.263 
so we have 0.263 moles of zinc, and you need twice the amount of chlorine so therefore 0.526moles of chlorine= 0.526x 17=8.942g of chlorine 
i cba to work the rest out but the most reasonable answer is 0.24 mol however if you need to use working outs, use the formula i provided earlier
        
             
        
        
        
Answer:
THE EMPIRICAL FORMULA OF THE SUBSTANCE IS C2H5NO
Explanation:
The steps involved in calculating the empirical formula of this substance in shown in the table below:
Element                            Carbon           Hydrogen          Nitrogen         Oxygen
1. % Composition              40.66              8.53                 23.72                27.09
2. Mole ratio =
%mass/ atomic mass       40.66/12         8.53/1          23.72/14            27.09/16
                                        =  3.3883            8.53              1,6943             1.6931
3. Divide by smallest
value (0.6931)          3.3883/1.6931    8.53/1.6931    1.6943/1.6931   1.6931/1.6931
                                =      2.001                  5.038           1.0007                      1
4. Whole number ratio        2                       5                   1                               1
The empirical formula = C2H5NO
 
        
             
        
        
        
Answer:
1.1 × 10² g
Explanation:
First, we will convert 1.0 L to cubic centimeters.
1.0 L × (10³ mL/1 L) × (1 cm³/ 1 mL) = 1.0 × 10³ cm³
The density of water is 1.0 g/cm³. The mass corresponding to 1.0 × 10³ cm³ is:
1.0 × 10³ cm³ × (1.0 g/cm³) = 1.0 × 10³ g
1 mole of water (H₂O) has a mass of 18 g, consisting of 2 g of H and 16 g of O. The mass of Hydrogen in 1.0 × 10³ g of water is:
1.0 × 10³ g H₂O × (2 g H/18 g H₂O) = 1.1 × 10² g