Your answer would be D friction.
Density can be calculated using the following rule:
Density = mass / volume
Therefore:
mass = density * volume
We are given that:
Density = 75 g/ml
volume = 12 ml
Substitute with these givens in the equation to get the mass as follows:
mass = density * volume
mass = 75 * 12
mass = 900 g
Answer:
The answer is the first option 0.37 moles
Explanation:
the ideal gas law is PV = nRT, so in the terms of n,
n = PV/RT (divide both sides by RT to let n stand alone)
given: P = 700 kpa, V = 2L, T = 450 K , R = 8.31
n = (700 * 2) / (8.31 * 450)
= 1400/3739.5
= 0.34
D. 100%, extremely sure. Because Newton's 3rd law states every force has an equal and opposite reaction.