0.2 × 6.022 × 10²³ = 12.044 × 10²² = 1.2044 × 10²³
The amount of oxygen needed would be 80.19 grams
<h3>Stoichiometric problems</h3>
From the equation of the reaction:
![4NH_3 +3 O_2 --- > 2N_2 + 6H_2O](https://tex.z-dn.net/?f=4NH_3%20%2B3%20O_2%20---%20%3E%202N_2%20%2B%206H_2O)
The mole ratio of oxygen and ammonia is 3:4
Mole of 56.8g ammonia = 56.8/17 = 3.34 moles
Equivalent mole of oxygen = 3/4 x 3.34 = 2.5059 moles
Mass of 2.5059 moles oxygen = 2.5059 x 32 = 80.19 grams
More on stoichiometric problems can be found here: brainly.com/question/15047541
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Answer:
- <em>Stored chemical energy is converted to mechanical energy.</em>
Explanation:
A <em>battery</em> posses <em>chemical energy</em>: this is chemical potential energy, which means that it is stored in the chemical bonds of the compounds in the battery. When the compounds in the battery react some bonds are broken and others are formed; at the end some energy is released and electricity is produced.
So, the chemical energy is first transformed into electrical energy.
A motor in the toy is able to transform that electrical energy into motion of gears and axes, which is how the wheels can spin. This motion of gears, axes and wheels is mechanical energy (kinetic energy).
Then, as you see, in that way the stored chemical energy in the battery is transfered to mechanical energy of the toy as it <em>rolls across the floor</em> thanks to the spin of the wheels.
Answer:
3. atoms, ions, or molecules
Explanation:
A crystal is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.
Hope this helps!
Answer:
Liquid
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