1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Andre45 [30]
3 years ago
5

Calculate the mass defect for the isotope thorium-234

Chemistry
2 answers:
kiruha [24]3 years ago
8 0

Answer:1.85864 amu

Explanation:

Just got this problem

inn [45]3 years ago
6 0
Mass defect is defined as the difference or discrepancy between the mass of the nucleons and the mass of the nucleus. the nucleons involved are the protons and neutrons. 
mp  = 1.6727 x 10-24 g = <span>1.007316 amu</span>mn = 1.6750 x 10-24 g = <span>1.008701 amu</span>
mTh 234 = 234 g/mol = 234 amu

Th234 (protons = 90; neutrons = 144)
mass defect = mp*90 + mn *144 - 234
mass defect = 1.911384 amu

You might be interested in
Ag2O(s) → 2Ag(s) + ½ O2(g) ΔH° = 31.05 kJ Which statements concerning the reaction above are true? (1) heat is released (2) heat
Sidana [21]

Answer:

D) 2, 4, and 5

Explanation:

In order to fully comprehend the answer choices we must take a close look at the value of ΔH° = 31.05. The enthalpy change of the reaction is positive. A positive value of enthalpy of reaction implies that heat was absorbed in the course of the reaction.

If heat is absorbed in a reaction, that reaction is endothermic.

Since ∆Hreaction= ∆H products -∆H reactants, a positive value of ∆Hreaction implies that ∆Hproducts >∆Hreactants, hence the answer choice above.

5 0
3 years ago
How many atoms are in KOH?
Nata [24]

Answer:

KOH contains only one K, so a mole of KOH contains one mole of K. How many atoms of K are in 1 mole of KOH? There are 6.022 × 1023 atoms of potassium in every mole of potassium. Since one mole of KOH contains one mole of K, the answer is 6.022×1023 atoms of K.

Explanation:

3 0
3 years ago
HELP QUICK An unknown substance is a liquid and is red in color.
Zolol [24]
C. Look at a small sample I think
4 0
3 years ago
If I contain 3 moles of gas in a container with a volume of 60 liters and at a temperature of 400 K, what is the pressure inside
Naily [24]

Answer:

1.64pa

Explanation:

1.64pa of pressure will be contained inside the container

5 0
3 years ago
What is a property of an element that does not depend on the amount of the element?
34kurt
That properties are called CHARACTERISTICS PROPERTIES.
4 0
3 years ago
Other questions:
  • The best determinant of how an individual measures their quality of life is _______.
    7·2 answers
  • Is a metal baking tray a conductor or insulator or a radiator
    12·2 answers
  • you see a coin at the bottom of a fountain of water but when you reach for it it is in another place than it appears to be
    11·1 answer
  • The model below shows an atom of an element. 9 light grey and 8 dark grey balls sit at the center with 2 concentric black rings
    8·2 answers
  • Please help guys if you know it!
    5·1 answer
  • EXPLAIN: How does the amount of a substance affect the rate<br> at which temperature changes?
    11·1 answer
  • ___ are in group 18
    11·1 answer
  • If some the hexane had evaporated from the stearic acid solution, what effect (if any) would it have on the experimental value o
    10·1 answer
  • Please help! you are amazing! also brainliest :)
    12·2 answers
  • Do particles in air take the space of the container when some particles of air are released?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!