1234567891011121314151617181920
 
        
             
        
        
        
Answer:
carbon dioxide concentration goes down, temperature goes down. Carbon dioxide goes up temp goes up, carbon dioxide is directly related to temperature by insulating it in the earths atmosphere and if there's less of it then the temp would go down.
Explanation:
 
        
             
        
        
        
Answer:
Protons are positively charged. When a nucleus emits an alpha particle, these changes happen: the mass number decreases by 4. the atomic number decreases by 2.
Explanation:
 
        
                    
             
        
        
        
The heat lost is 
The heat lost when the ice is cooled from 400k to 263K can be calculated using the formula of heat transfer.
<h3>Heat Transfer</h3>
This is the heat transferred from a body of higher temperature to a body of lower temperature.

- Q = Heat Transfer
- m = mass = 1277g
- ΔT  = change in temperature 

We converted the temperature from kelvin scale into Celsius scale and find the change in temperature.
 Solving for heat transfer

The heat loss is approximately 
Learn more on heat transfer here;
brainly.com/question/16055406
 
        
             
        
        
        
Answer:
= C3H4N
Explanation:
We are given; 90 grams carbon, 11 grams hydrogen, and 35 grams nitrogen.
We first calculate the number of moles of each element.
Carbon = 90g/12 g/mol 
             = 7.5 moles 
Hydrogen = 11 g/ 1 g/mol
                  = 11 moles 
Nitrogen = 35 g/ 14 g/mol 
                = 2.5 moles 
The we get the mole ratio of the elements;
= 7.5/2.5 : 11/2.5 : 2.5 /2.5 
= 3 : 4.4 : 1 
= 3 : 4 : 1 
Therefore;
The empirical formula will be; C3H4N