Answer:
Explanation:
Mass and weight are quite different terms .
Weight is defined as the amount of force exerted on the earth due to our mass and gravity of acceleration.
Given that the mass is 90 kg and gravity of acceleration of earth is 9.82 m/s^2.
So weight will be
So this is the weight of the 90kg man standing on earth.
Answer:
Explanation:
From the work of Krogh in 1918 until the present time, a very wide range of values for oxygen diffusion coefficients has been reported1–5 ranging from 1.1 × 10−4 to 4 × 10−8 cm2 sec−1.
Explanation:
Force exerted by the floor on lady = Force exerted by the lady on the floor = Weight of the lady = 500N.
Answer:
2.35 L
Explanation:
Given data:
Mass of sodium metal = 4.81 g
Volume of Cl react at STP= ?
Balance chemical equation = ?
Solution:
Balance chemical equation:
2Na + Cl₂ → 2NaCl
Number of moles of Na:
Number of moles = mass/ molar mass
Number of moles = 4.81 g/ 23 g/mol
Number of moles = 0.21 mol
Now we will compare the moles of sodium and chlorine from balance chemical equation.
Na : Cl₂
2 : 1
0.21 : 1/2×0.21 = 0.105 mol
Volume of Cl₂:
PV = nRT
standard temperature = 273 K
standard pressure = 1 atm
R = general gas constant = 0.0821 atm.L/mol.K
n = moles = 0.105 mol
Now we will put the values.
V = 0.105 mol × 0.0821 atm.L/mol.K × 273 K / 1 atm
V = 2.35 L/ 1
V = 2.35 L
