Answer:
When atoms are excited they emit light of certain wavelengths which correspond to different colors. Each element produces a unique set of spectral lines. Since no two elements emit the same spectral lines, elements can be identified by their line spectrum.
Explanation:
Explanation:
Rate law is defined as the rate of a reaction is directly proportional to the concentration of reactants at constant temperature.
![Rate \propto [\text{concentration of reactant}]^{n}](https://tex.z-dn.net/?f=Rate%20%5Cpropto%20%5B%5Ctext%7Bconcentration%20of%20reactant%7D%5D%5E%7Bn%7D)
= k ![[\text{concentration of reactant}]^{n}](https://tex.z-dn.net/?f=%5B%5Ctext%7Bconcentration%20of%20reactant%7D%5D%5E%7Bn%7D)
where, k = rate constant
n = order of reaction
For the given reaction, 
Hence, its rate will be as follows.
Rate = ![k[H_{2}][NO]](https://tex.z-dn.net/?f=k%5BH_%7B2%7D%5D%5BNO%5D)
Also, it is known that slowest step in a chemical reaction is the rate determining step.
Hence, for the given rate law correct reaction is as follows.
Step 1 : 
(slow)
Balancing this equation it becomes 
(slow)
Step 2: 
(fast)
Answer:
38
Explanation:
19
it is impossible that there is only sperm .egg must be present from female
38
19 from male and 19 from female
it is correct
76
dog has 76 chromosomes
if cat has it will be abnormal due to unequal chromosome
152
also not possible
The theoretical yield of Aluminum oxide is 193.8 grams
<em><u>calculation</u></em>
Theoretical yield is calculate as below
the balanced equation for reaction is as below
4 Al +3 O2 → 2Al2O3
The mole ratio of Al: Al2O3 is 4 :2 therefore moles of Al2O3
= 3.40 x2/4 =1.7 moles
The mole ratio of O2 : Al2O3 is 3:2 therefore moles of Al2O3 is
= 2.85 x 2/3 =1.9 moles
N.b O2 is in excess therefore it's mole is used to determine moles of Al2O3 which is used to calculate theoretical yield.
theoretical yield is therefore = 1.9 moles x 102 g/mol= 193.8 grams
