After 3 half-lives, 125 grams of the parent isotope will remain.
Answer:
119.5 J
Explanation:
First we <u>calculate the temperature difference</u>:
- ΔT = 100 °C - 50 °C = 50 °C
Then we can <u>calculate the heat released</u> by using the following formula:
Where q is the heat, Cp is the specific heat, ΔT is the temperature difference and m is the mass.
We <u>input the data</u>:
- q = 0.239 J/g°C * 50 °C * 10.0 g
Answer: D.kinectic energy
Explanation
Answer:
used to date rocks and other objects based on the known decay rate of radioactive isotopes.
Explanation:
Different methods of radiometric dating can be used to estimate the age of a variety of natural and even man-made materials.
Answer: The volume for 0.850 mol of
from a
solution is 1700 mL.
The volume of 30.0 g of LiOH from a 2.70 M LiOH solution is 464 mL.
Explanation:
Molarity is the number of moles of solute present in a liter of solution.
- As given moles of
are 0.850 mol and molarity of
solution is 0.5 M. Hence, its volume is calculated as follows.

Therefore, the volume for 0.850 mol of
from a
solution is 1700 mL.
- As given mass of LiOH are 30.0 g from a 2.70 M LiOH (molar mass = 23.95 g/mol) solution. Hence, its number of moles are calculated as follows.

So, volume for LiOH solution is calculated as follows.

Therefore, volume of 30.0 g of LiOH from a 2.70 M LiOH solution is 464 mL.