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
lara [203]
3 years ago
9

PLEASE HELP WILL GIVE BRAINLEIST ASAP Determine the fraction of an original sample of K-42 that remains unchanged after 24.72 ho

urs.
Chemistry
1 answer:
Alinara [238K]3 years ago
8 0

Answer:

25% or 0.25 or 1/4

Explanation:

don't know which form you need so here you have all 3

good luck :)

You might be interested in
Explain Newton’s third law of motion.
laiz [17]

Answer:

His third law states that for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A. Notice that the forces are exerted on different objects.

Explanation:

5 0
3 years ago
Which statement describes solstices?
vodka [1.7K]
I believe it is the very first one

hope it helps :)
6 0
3 years ago
Read 2 more answers
What two factors affect the rate of acceleration of an object?
anastassius [24]

Answer:

force and mass

Explanation:

4 0
3 years ago
Which forces involve nonpolar molecules?
Elanso [62]
The answer is London dispersin forces and dipole-induced dipole forces.

The London dispersion force is a temporary attractive force that results when the electrons in two adjacent atoms occupy positions that make the atoms form temporary dipoles. This force is sometimes called an induced dipole-induced dipole attraction. This force is found in any compound and is the weakest atraction force between atoms or molecules.

Those temporay dipoles are not like the dipoles that form the polar molecules, because the polar molecules are the result of permanent dipoles.
8 0
4 years ago
Read 2 more answers
The amount of calcium hydroxide needed to react completely with a 100.0 g of nitric acid
Ierofanga [76]

Answer:

The answer to your question is 58.7 g of Ca(OH)₂

Explanation:

Data

mass of Ca(OH)₂ = ?

mass of HNO₃ = 100 g

Process

1.- Write the balanced chemical reaction

              Ca(OH)₂ + 2HNO₃   ⇒   Ca(NO₃)₂  +  2H₂O

2.- Calculate the molar mass of the reactants

Ca(OH)₂  = 40 + 32 + 2 = 74 g

HNO₃ = 1 + 14 + 48 = 63 g

3.- Use proportions to calculate the mass of Ca(OH)₂

                  74 g of Ca(OH)₂ ----------------- 2(63) g of HNO₃

                    x                        ----------------- 100 g of HNO₃

                          x = (100 x 74) / 2(63)

                          x = 7400 / 126

                         x = 58.7 g

3 0
4 years ago
Other questions:
  • (BEST ANSWERS GET BRAINLIEST) How does the Griffith experiment connect to the Meselson & Stahl experiment? How does this exp
    9·1 answer
  • Help me pleaseeeeeeeeeeeeeeeeeeeeeeeeeeeeeee this 10 points answer the ones i didnt answer
    10·1 answer
  • The value of ΔHvap for water at 100.°C is 40.7 kJ/mol. How much energy (in J) is required to completely vaporize 5.6 g of water
    10·1 answer
  • What volume would a 0.871 gram sample of air occupy if the density of air is 1.29 g/L?
    7·2 answers
  • Organism that lives off dead material
    8·2 answers
  • What is the term<br>chemistry​
    9·2 answers
  • CH4 --&gt; C + H2 synthesis O decomposition O single displacement double displacement KBr + Cl2 --&gt; KCL + Br24​
    12·1 answer
  • When 84. 8 g of iron (III) oxide reacts with an excess of carbon
    13·1 answer
  • Why agar is used as a solidifying agent in culture media instead of gelatin
    14·1 answer
  • What are the hydronium and hydroxide ion concentrations in a solution whose ph is 6.52?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!