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
snow_lady [41]
3 years ago
8

assume you have a 500 g sample of a radioactive isotope with a half-life of 100 years. fill in the table showing how many grams

of material will remain after the indicated time has passed.
Chemistry
2 answers:
djverab [1.8K]3 years ago
6 0
8.10 hours is the answer
sweet-ann [11.9K]3 years ago
3 0

Answer:

8.10 hours.

Explanation:

You start with 500.0g.

After the first half-life, you have 250.0g.

After the second, you have 125.0g.

After the third, you have 62.50g.

Therefore, it takes three half-lives to decay to 62.50g.

Therefore, the elapsed time must be triple the length of one half-life.

24.3

3

=

8.10

, so it is 8.10 hours.

Explanation:

You might be interested in
Determine the number of grams of carbon 3.14x 1023 atoms of carbon
tiny-mole [99]
<h3>Answer:</h3>

6.26 g C

<h3>General Formulas and Concepts:</h3>

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right<u> </u>

<u>Chemistry</u>

<u>Atomic Structure</u>

  • Reading a Periodic Table
  • Moles
  • Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

<u>Stoichiometry</u>

  • Using Dimensional Analysis
<h3>Explanation:</h3>

<u>Step 1: Define</u>

[Given] 3.14 × 10²³ atoms C

[Solve] grams C

<u>Step 2: Identify Conversions</u>

Avogadro's Number

[PT] Molar Mass of C - 12.01 g/mol

<u>Step 3: Convert</u>

  1. [DA] Set up:                                                                                                      \displaystyle 3.14 \cdot 10^{23} \ atoms \ C(\frac{1 \ mol \ C}{6.022 \cdot 10^{23} \ atoms \ C})(\frac{12.01 \ g \ C}{1 \ mol \ C})
  2. [DA] Multiply/Divide [Cancel out units]:                                                         \displaystyle 6.26227 \ g \ C

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 3 sig figs.</em>

6.26227 g C ≈ 6.26 g C

7 0
2 years ago
Read 2 more answers
What would it feel like to walk on the surface of the moon??
Cloud [144]
I'm pretty sure it would feel like magic, You could definitely float when you jump  
6 0
3 years ago
Read 2 more answers
Explain what lattice energy is and how it affects the properties of ionic compounds. Describe the general properties of ionic co
irga5000 [103]
An ionic compound is the attraction between a metal and a nonmetal!!
8 0
2 years ago
Read 2 more answers
I need help with this
masha68 [24]
Answer is —-7373/63)3
6 0
2 years ago
Acidified water is electrolysed by using carbon electrodes. What is produced
kotegsom [21]

Answer:

Hydrogen gas

Explanation:

During electrolysis of acidified water, H+ ions are reduced to H2 gas at the negative carbon electrode (cathode) and hence hydrogen gas is liberated at cathode.

5 0
3 years ago
Other questions:
  • The hybird orbitals used for bonding by xe in unstable xef2 molecules
    9·1 answer
  • All organic compounds must contain the element
    14·1 answer
  • What is the factor that affects how easily an electron can be removed from an atom?
    13·1 answer
  • You need to make an aqueous solution of 0.230 M aluminum nitrate for an experiment in a lab. Using a 250 ml volumetric flask how
    12·1 answer
  • Identify examples of the list below. Check all that apply
    7·2 answers
  • Who was the first governor of the Massachusetts Bay Colony?
    13·1 answer
  • What does the little 2 in 2CO2 mean?
    15·1 answer
  • What variable(s) determine the amount of kinetic energy an object has?
    9·1 answer
  • In an experiment 10 grams of a substance has a volume of 24 cm. What is the
    12·1 answer
  • Which of the choices below is an empirical formula
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!