Most chemical elements are solid at room temperature. Some elements exist as gases but only two elements, mercury (Hg) and bromine (Br) are liquids at room temperature (approx 25oC). Hope this helped you!
        
             
        
        
        
Answer:

Explanation:
Data:
p₁ = 694.9 mmHg; V₁ = 3.463 L
p₂ = ?;                     V₂ = 5.887 L
Calculation:

 
        
             
        
        
        
Answer:
D
Explanation:
There are only 2 ways to explain this.
distance
and brightness caused by what it is burning. 
A is true but it is not the explanation of why it is true.
B this is actually not true. Other stars would burn much more.
C It is not the largest star. In fact it is in the lower middle. 
D is the answer. 93 million miles as these things go, is not every much.
 
        
             
        
        
        
C + O2 --> CO2
18g C = 18/12.01 = 1.49 moles (Limiting Reagent) 
62.3-14.3 = 48g oxygen that reacted 
48g O = 3 moles 
        
             
        
        
        
Answer:
i) The bond angle decreases due to the presence of lone pairs, which causes more repulsion on the bond pairs and as a result, the bond pairs tend to come closer. ii) The repulsion between electron pairs increases with an increase in electronegativity of the central atom and hence the bond angle increases.
Explanation: