Nitrogen and hydrogen 
N2 +3 H2 ---> 2NH3
hope that answers the question:)
        
                    
             
        
        
        
Answer:
B. Electromagnetic waves travel in straight lines. 
 
        
             
        
        
        
Answer:
The options are
A. Saturated
B. Liquids at room temperature
C. Solid at room temperature 
D. Generally found in animal fats
E. Made of glycerol plus two fatty acids
The answer is B. Liquids at room temperature 
Explanation:
Fats composed of fatty acids that have double bonds in the fatty acids and have fewer than the maximum number of hydrogen atoms are liquids at room temperature.
This is because the deficiency in the maximum number of hydrogen atoms makes reduced the high bond strength synonymous with solids. This is why the lipids are known to be liquids at room temperature.
 
        
             
        
        
        
NONE of these DNA fragments can be completely amplified by using these primer combinations. PCR is a molecular biology technique.
<h3>What is PCR?</h3>
Polymerase chain reaction (PCR) is a technique used in molecular biology to replicate (amplify) a given fragment of DNA.
In this technique (PCR) primers sequences must be used to add nucleotides to the amplified DNA strands during DNA replication.
These nucleotide primers must be sequence complementary to the fragment of DNA desired to be amplified by PCR.
In this case, none of the DNA fragments can be fully generated by using these primers or any of their combinations.
Learn more about PCR here:
brainly.com/question/7177771