Answer:
17.65 grams of O2 are needed for a complete reaction.
Explanation:
You know the reaction:
4 NH₃ + 5 O₂ --------> 4 NO + 6 H₂O
First you must know the mass that reacts by stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction). For that you must first know the reacting mass of each compound. You know the values of the atomic mass of each element that form the compounds:
- N: 14 g/mol
- H: 1 g/mol
- O: 16 g/mol
So, the molar mass of the compounds in the reaction is:
- NH₃: 14 g/mol + 3*1 g/mol= 17 g/mol
- O₂: 2*16 g/mol= 32 g/mol
- NO: 14 g/mol + 16 g/mol= 30 g/mol
- H₂O: 2*1 g/mol + 16 g/mol= 18 g/mol
By stoichiometry, they react and occur in moles:
- NH₃: 4 moles
- O₂: 5 moles
- NO: 4 moles
- H₂O: 6 moles
Then in mass, by stoichiomatry they react and occur:
- NH₃: 4 moles*17 g/mol= 68 g
- O₂: 5 moles*32 g/mol= 160 g
- NO: 4 moles*30 g/mol= 120 g
- H₂O: 6 moles*18 g/mol= 108 g
Now to calculate the necessary mass of O₂ for a complete reaction, the rule of three is applied as follows: if by stoichiometry 68 g of NH₃ react with 160 g of O₂, 7.5 g of NH₃ with how many grams of O₂ will it react?
![mass of O_{2} =\frac{7.5 g of NH_{3} * 160 g of O_{2} }{68 g of NH_{3} }](https://tex.z-dn.net/?f=mass%20of%20O_%7B2%7D%20%3D%5Cfrac%7B7.5%20g%20of%20NH_%7B3%7D%20%2A%20160%20g%20of%20O_%7B2%7D%20%7D%7B68%20g%20of%20NH_%7B3%7D%20%7D)
mass of O₂≅17.65 g
<u><em>17.65 grams of O2 are needed for a complete reaction.</em></u>
Answer:
a.The waves are absorbed or reflected to capture images
Explanation:
How Things Work: TSA scanners use electromagnetic waves for detection. ... These waves are bounced off the body of the person being scanned to create a three-dimensional image on the computer. The backscatter units instead bounce low-level electromagnetic X-rays off the body to create an image on the computer
Answer:
The answer to your question is below
Explanation:
Sodium hydroxide (NaOH): 39 g/mol
Na = 23 O = 16 H =1 MM = 23 + 15 + 1 = 39
Water (H2O): 18 g/mol
H =1 O = 16 MM = 1 x 2 + 16 = 2 + 15 = 18
Glucose (C6H12O6): 180 g/mol
C = 12 H = 1 O = 16 MM = 12 x 6 + 12 x 1 + 16 x 6 = 72 + 12 + 96 = 180
Calcium sulfate (CaSO4): 136 g/mol
Ca = 40 S = 32 O = 16 MM = 40 + 32 + 16x4 = 40 + 32 + 64 = 136
Magnesium phosphate (Mg3(PO4)2): 264 g/mol
Mg = 24 P = 31 O = 16 MM = 24 x 3 + 31x2 + 16 x 8 = 72 + 64
+ 128 = 264
Answer:
Luminosity is the amount of light that a star radiates. The size of the star and its surface temperature determine its luminosity. Apparent magnitude of a star is its perceived brightness, factoring in size and distance, while absolute magnitude is its true brightness irrespective of its distance from earth
Explanation:
Answer:
True
Explanation:
There are four time zones in the continental United States: Eastern, Central, Mountain and Pacific.