Answer:
79.994g NaOH
Explanation:
The formula for molarity is M=moles of solute/Liters of solution, M=n/L
You are given L and M, so 0.4=n/5
n (moles of solute) = 2
2 moles of NaOH, multiplied by the molar mass of NaOH (39.997) to get the mass needed: 79.994g
Answer: C. neon gas
Explanation: There are three states of matter:
A. Solid iron: The molecules in solid are very tightly packed as inter molecular forces are very high. There is very less space between the particles and thus the molecules can not be compressed. They have fixed shape and volume.
B. liquid bromine: The molecules in liquid are less tightly packed as inter molecular forces are not very high. There is less space between the particles and thus the molecules can not be compressed. They have fixed volume and take the shape of the container.
C. neon gas : The molecules in gas are very less tightly packed as inter molecular forces are very low. There is large vacant space between the particles and thus the molecules can be compressed. They neither have fixed volume nor a fixed shape.They occupy complete volume of the container in which it is put.
D. sugar crystals: The molecules in solid are very tightly packed as inter molecular forces are very high. There is very less space between the particles and thus the molecules can not be compressed. They have fixed shape and volume.
Answer:
Explanation:
Given that,
Mass of a glass, m = 4 g
Initial temperature, 
Final temperature, 
Heat absorbed, Q = 32 J
We need to find the specific heat of the glass. The formula for the heat absorbed is given by :
So, the required specific heat of the glass is 
.
