Answer:
moles O₂ needed = 0.19 mole
Explanation:
4Fe(s) + 3O₂(g) => 2Fe₂O₃(s)
1.396g Fe(s) = 1.396g/56g/mol = 0.025 mole Fe(s)
0.025 mole Fe(s) reacts with 3/4(0.025 mole O₂(g) = 0.019 mole O₂(g)
The answer is a. triple beam balance
The Standard Temperature and Pressure is 1 atm, 273 K
<u>Explanation:</u>
STP is Standard Temperature and Pressure
- Standard temperature is characterized as zero degrees Celsius (0°C), or 273.15 degrees Kelvin (273.15 K). This is the point of solidification of water at sea level, in the air at standard pressure.
Standard Temperature is
0° C in Celsius or 273 K in Kelvin
- Standard Pressure is 1 Atm, 101.3kPa or 760 mmHg or torr. STP is the "standard" condition regularly utilized for estimating gas density and volume.
Standard Pressure is
1 Atmosphere (atm)
760 Torricelli's (torr)
760 Millimeters of Mercury (mmHg)
101.325 KiloPascals (kPa)
"<span>Cohesion" is the property of water molecules that leads to high surface tension.
</span>
Surface tension is defined as the energy or the work required to increase the surface area of a liquid as a result of intermolecular forces.
In water molecules, the hydrogen ends, which are positive compared to oxygen ends, cause the water molecules to stick together, thus, increasing its surface tension.
The answer to the problem is 7/10