Number of molecules in 1 dm³ Oxygen = 2.71 x 10²²
<h3>Further explanation</h3>
Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters/mol.
The mole is the number of particles contained in a substance
1 mol = 6.02.10²³
1 dm³ of oxygen = 1 L Oxygen
n=mol=0.045
No = 6.02.10²³
Answer:
C. 21%oxygen
Explanation:
Dry air contains 78.09% nitrogen, 20.95%oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases.
Yes yes yes and yes oh did i say yes?
D. M represents electrical energy, K represents mechanical energy
Explanation:
A blender transforms electrical energy to mechanical energy. Where M is the electrical energy and K is the mechanical energy.
- A blender is laboratory device used to mix and puree food substances especially fruits.
- It is powered by electricity which causes the blades to turn and rotate very fast.
- therefore, it transforms electrical energy into mechanical energy.
Learn more:
Energy brainly.com/question/4633609
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