Answer:
The coefficient of friction of the surface μ = 0.235
Explanation:
Values of the given variables:
Weight of block = 8.5 N
Pushing force F = 2 N
velocity = constant
Solution:
Newton's Second Law of motion states that acceleration of an object depends on the mass of the object and the force applied
F = m a
Since v =constant, a = 0. Thus
Net force Fnet = 0.
Now F_net is the sum of the pushing force and the frictional force along the horizontal, which opposes the motion:
Fnet = Fpushing - Ffrictional_force
Given that Fnet = 0, Fpushing = Ffrictional_force. and Ffrictional_force = 2 N
Equation of friction is given by
Ffrictional_force = μ*W
2 = μ*8.5
μ = 2/8.5 = 0.235
Filtration
distillation
crystallization
chromatography
<span>Condensation takes place when gas molecules lose heat and kinetic energy. The warmer molecules are the faster they move. Gas molecules move very quickly and have a lot of kinetic energy and heat energy. As the gas molecules lose heat they also lose kinetic energy. As the molecules slow down they move closer together to form liquids.</span>
Answer:
13=C
14=D
Explanation:
I cant explane the right formula but my answer is correct
Answer:
1. 23.3 g
2. 82 g
3. 0.402 mol
4. 0.506 mol
Explanation:
We can convert moles (n) to mass (m) using the following expressions that include the molar mass (M).
n = m/M
m = n × M
1. The molar mass of NH₄Cl is 53.49 g/mol.
m = 0.436 mol × 53.49 g/mol = 23.3 g
2. The molar mass of Ca(NO₃)₂ is 164.09 g/mol.
m = 0.50 mol × 164.09 g/mol = 82 g
3. The molar mass of NaCl is 58.44 g/mol.
n = 23.5 g/(58.44 g/mol) = 0.402 mol
4. The molar mass of KMnO₄ is 158.03 g/mol.
n = 79.9 g/(158.03 g/mol) = 0.506 mol
