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
sattari [20]
4 years ago
14

If you have 100 grams of a chemical with a half-life of 8 days, then how much will you have after 40 days?

Chemistry
1 answer:
dedylja [7]4 years ago
8 0

Answer:

option d = 3.125 g

Explanation:

Given data:

Mass of chemical = 100 g

Half life = 8 days

mass left after 40 days = ?

Solution:

First of all we will calculate the total half life's,

half life's = T (elapsed) / T half life

half life's = 40 / 8 = 5

starting mass = 100 g

  half life's         1           2          3             4               5

 Mass             100/2    50/2      25/2       12.5/2       6.25/2

                         50 g        25 g        12.5 g      6.25 g        3.125 g

 

You might be interested in
If you had an object with a mass of 76g and a volume of 22 ml, what is its density? If you cut this object in half, what would b
V125BC [204]
D = M/V = 76g / 22ml = 3.4g/ml

Half ~ D = 38g / 11ml = 3.4g/ml

Even if the object you had was cut in half, it’s density would remain the same.
8 0
3 years ago
Correct answer. 9. The mass number of an element is the number of? ​
Elis [28]

Answer:

The mass number is defined as the total number of protons and neutrons in an atom. The number of neutrons = mass number − atomic number.

4 0
3 years ago
Copy the lists of measurements shown below. Pay close attention to the units that follow each number. List 1: 150 mL 11 mL 200 m
stich3 [128]

a) cross out 11mL from list 1, 2 mL from list 2, and 998 cm3 from list 3.

b) circle 200 mL from list 1, 801 mL from list 2, and 1 L from list 3.

7 0
3 years ago
Read 2 more answers
Which ligand binds tightest? ligand A, with a dissociation constant ( Kd ) of 10−9 M ligand D, with a percent occupancy of 80% a
Delvig [45]

Answer:

The answer will be Ligand A with a dissociation constant (Kd) of 10^{-9}M

Explanation:

When the dissociation constant in the ligand is small (in order of nano) ( 10^{-9}) it will be more tied. Due to a dissociation constant measures how much a ligand can be able to be separated from the protein so if the number is small it means that the ligand is highly binded to the protein.

On the other hand, the occupancy percentage of the ligand does not imply binding. Conversely, a High-affinity ligand binding with the proteins implies that a relatively low concentration of a ligand is adequate to occupy the maximum ligand-binding site.

6 0
3 years ago
How are all cells similar?
Reika [66]

Answer:

All cells have structural and functional similarities. Structures shared by all cells include a cell membrane, an aqueous cytosol, ribosomes, and genetic material (DNA). All cells are composed of the same four types of organic molecules: carbohydrates, lipids, nucleic acids, and proteins.

Explanation:

⊂_ヽ

\\ Λ_Λ

\( ˇωˇ)

> ⌒ヽ

/ へ\

/ / \\

レ ノ ヽ_つ

/ / YOU GOT DAT

( (ヽ

| |、\

| 丿 \ ⌒)

| | ) /

ノ ) Lノ

(_/

8 0
3 years ago
Other questions:
  • 3. Based on the Periodic Table, which of the following elements has physical
    10·1 answer
  • The density of copper is 9.0g/cm3 and the mass of a copper coin is 0.31g. Calculate the volume of the coin.
    11·1 answer
  • Which words in the sentence are the adjective clause? Alessandra, whom everyone calls "Al," is the best tennis player on the tea
    13·1 answer
  • What are two properties of diamonds that make them different from other forms of carbon?
    12·1 answer
  • Electron electrical change is
    13·1 answer
  • Which oxide(s) of manganese have a mass percent of the metal that is greater than 50%?MnO MnO2 Mn2O3All of these102
    11·1 answer
  • Which describes the greatest difference between gases and solids?
    13·2 answers
  • If 0.583 g of ammonia (NH3) is dissolved to make 250 mL of solution, what is the molarity?
    9·1 answer
  • The balanced equation for photosynthesis is shown below.
    12·1 answer
  • Describe the relationship between the strength of a force on an object and the subsequent t change in velocity
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!