Red #40 is soluble in water while zinc oxide is not.
So the easiest way to separate them is as follows:
1- add water to the mixture until red #40 is dissolved in the water
2- filter to separate the zinc oxide
4- heat the solution of red #40 and water until water evaporates and red#40 remains.
True ! search it up on safari and it tells you that it’s true
Answer:
Yes, there will be liquid present and the mass is 5.19 g
Explanation:
In order to do this, we need to use the equation of an ideal gas which is:
<em>PV = nRT (1)</em>
<em>Where:</em>
<em>P: Pressure</em>
<em>V: Volume</em>
<em>n: number of moles</em>
<em>R: gas constant</em>
<em>T: Temperature</em>
we know that the pressure is 856 Torr at 300 K. So, if we want to know if there'll be any liquid present, we need to calculate the moles and mass of the CCl3F at this pressure and temperature, and then, compare it to the initial mass of 11.5 g.
From (1), solving for moles we have:
<em>n = PV/RT (2)</em>
Solving for n:
P = 856/760 = 1.13 atm
R = 0.082 L atm / mol K
n = 1.13 * 1 / 0.082 * 300
n = 0.0459 moles
Now, the mass is:
m = n * MM (3)
The molar mass of CCl3F reported is 137.37 g/mol so:
m = 0.0459 * 137.37
m = 6.31 g
Finally, this means that if we put 11.5 g of CCl3F in a container, only 6.31 g will become gaseous, so, this means it will be liquid present, and the mass is:
m = 11.5 - 6.31
m = 5.19 g
Q. Which object is accelerating?
A: A skateboarder speeding up as he skates down a ramp.
The car is not accelerating as it is travelling at constant velocity. Acceleration refers to the rate of change of velocity of an object over time. Thus, there is no acceleration for the car.
The bicycle is not accelerating as it is decelerating (slowing down). This is not to be confused with accelerating in the opposite direction. Deceleration refers to the rate at which an object slows down. Deceleration is a scalar quantity whereas acceleration is a vector quantity. Yeah.
The final one isn't right, well, because the first two options are wrong.
So through process of elimination, you can deduce that the skateboarder experiences acceleration.
Also, the skateboarder experiences acceleration as he is "speeding up", implying that his speed is not constant and in fact increasing, so there's acceleration.
