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
marissa [1.9K]
2 years ago
11

25 grams of radon-222 remains after 15.28 days. How much radon was in the original sample? Write an equation for the decay of ra

don-222.
Chemistry
1 answer:
Crazy boy [7]2 years ago
8 0

Answer:

half-life = 3.8 days

total time of decay = 15.2 days

initial amount = 100. g

number of half-lives past: 15.2/3.8 = 4 half-lives

4 half-lives = 1/16 remains

100. g x 1/16 = 6.25 g

You might be interested in
NH3 + H2O <br> How do I balance this
Alla [95]

Answer:

NH3 +H2O = NH4OH

Explanation:

no.of N atoms,O atoms and H atoms are now equal on both sides of the arrow.

5 0
3 years ago
Why is xenon monatomic but bromine is diatomic
WARRIOR [948]
B 3-4 is the auto
If it’s needs
8 0
2 years ago
How many water molecules are need to break down an oligosaccharide that contains 10 glucose units?
mestny [16]
Answer is 10 units of water molecules.
3 0
3 years ago
Write the formulas for the following compounds :
Vanyuwa [196]
Sodium phosphate = Na₃PO₄

phosphorus triiodide = PI3

hope this helps. make brainliest please!
6 0
3 years ago
Read 2 more answers
Why might a scientist repeat an experiment if she did not make a mistake in the first one? A) Scientists who repeat experiments
9966 [12]

Answer:

The correct answer is B) it helps to ensure the result are consistent and repeatable.

Explanation:

Scientist generally repeat an experiment if he or she did not make a mistake in the first one to compare the results of two experiment, if there is no difference in the result or values obtainted from the observation of two experiment. he or she become sure that experiment was done in a right way because if there is some error made when experiment was carried out then the result of two same experiment would be different.

3 0
3 years ago
Other questions:
  • How are elements arranged in the periodic table?
    12·2 answers
  • What happens when you decrease the number of electrons in an atom?
    8·1 answer
  • The chemical equation given below represents the chemical reaction between lithium (Li) and sulfur (S). In the equation, why is
    13·2 answers
  • How much solute (in mL) would you need to add to solvent in order to create 825 mL of a final solution that is 21% solute by vol
    7·1 answer
  • Colin is writing a story in which a spy damages a fusion nuclear reactor, the reaction runs out of control, and the reactor expl
    12·2 answers
  • I have an unknown volume of gas at a pressure of 0.5 atm and a temperature of 325k if I raise the pressure to 1.2 atm, decrease
    10·1 answer
  • How many grams of no2 are theoretically produced if we start with 1.20 moles of s and 9.90 moles of hno3?
    5·1 answer
  • Help before my mom yells at me!!!
    14·2 answers
  • Elements in period 1 are
    14·1 answer
  • The nuclear disintegration series of ________ is the source of radon-222 in soil.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!