Answer:
C
Explanation:
water has the highest specific heat capacity of any liquid,as a hydrogen bond
 
        
             
        
        
        
Answer:
The products are Calcium oxide and Carbon dioxide.
Explanation:
When calcium carbonate is heated, thermal decomposition occurs.
Calcium calcium → Calcium oxide + Carbon dioxide
 
        
                    
             
        
        
        
Answers:
               (a)  30.55 °C
               (b)  298 K and 77°F
               (c)  204.44 °C and 477.44 K
               (d)  -320.8 °F and -196 °C
Explanation:
Converting °C into °F;
                                    °F  =  °C × 1.8 + 32
Converting °F into °C;
                                    °C  =  °F - 32 ÷ 1,8
Converting °C into K;
                                    K  =  °C + 273
Converting K into °C;
                                    °C  =  K - 273
 
        
             
        
        
        
Answer:
a. 2,9x10⁻⁴ M HCl
Explanation:
A solution is considered acidic when its concentration of H⁺ is higher than 1x10⁻⁷. The higher concentration of H⁺ will be the most acidic solution.
a. 2,9x10⁻⁴ M HCl. In water, this solution dissolves as H⁺ and Cl⁻. That means concentration of H⁺ is 2,9x10⁻⁴ M.
b. 4,5x10⁻⁵M HNO₃. In the same way, concentration of H⁺ is 4,5x10⁻⁵M.
c. 1,0x10⁻⁷M NaCl. As this solution doesn't produce H⁺, the solution is not acidic
d. 1,5x10⁻²M KOH. This solution produce OH⁻. That means the solution is basic nor acidic.
Thus, the solution considered the most acidic is a. 2,9x10⁻⁴ M HCl, because has the higher concentration of H⁺.
I hope it helps!
 
        
             
        
        
        
C) Fluorine is the most reactive among halogens