Answer:
2)The particles in a liquid are moving past one another constantly.
3)The particles in gas move freely in all directions.
4)The particles in a solid vibrate in a fixed position.
6)The particles in a gas have few attractions between them.
7)The particles in all states of matter are always moving.
Explanation:
I think D If not sorry for giving the wrong one
Answer:
A. Is independent of other energy influences
Explanation:
Nuclear decay occurs at a constant rate. The rate of decay is independent of temperature.
B, C, and D are wrong. The decay rate cannot be sped up or slowed down at ordinary temperatures.
Answer:
There is no oxygen in 4,2 L of chlorine,
Explanation:
However, we can calculate the volume of 4.2 mol of a gas.
You don't give the volume and temperature, so I shall assume the gas is at STP (0 °C and 1 bar).
This looks like a case where we can use the Ideal Gas Law to calculate the volume.
pV = nRT
Data:
p = 1 bar
n = 4.2 mol
R = 0.083 14 bar.L·K⁻¹mol⁻¹
T = 0 °C = 273.15K
Calculations:
1 × V = 4.2 × 0.083 14 × 273.15
V = 95 L
The volume of 4.2 mol of a gas at STP is 
Answer:
C. 6.99 moles
Explanation:
To convert molecules to moles we simply divide the given number of molecules by Avogadro's number, 6.022 x 10²³
Given number of molecules : 4.21 x 10^24
Number of moles : 4.21 x 10^24 / 6.022 x 10²³ = 6.99 moles ( rounded )
The answer is C
