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
Serhud [2]
3 years ago
10

The Half-Life of Pa-234 is 6.75 hours. How much (what fraction) of a sample of this isotope remains after 20.25 hours?

Chemistry
1 answer:
Grace [21]3 years ago
6 0
So in one hour half the amount remains (that's what half life means). In two hours 1/4 (or half of half) would remain and in three hours 1/8 would remain.
So the answer is 1/8
You might be interested in
Select the steps that are associated with energy entering the system. Check all that apply.
quester [9]

Answer: option c. the mixing of solute and solvent molecules

Explanation:

8 0
3 years ago
Read 2 more answers
The lowest parts of a transverse wave are called
Law Incorporation [45]
Its number 3 the troughs
5 0
3 years ago
Read 2 more answers
Q2. Which formula represents a homogeneous mixture?
bija089 [108]

Answer:

D) HCl(aq)

Explanation:

A homogeneous mixture can be defined as any liquid, solid or gaseous mixture which has an identical or uniform composition and properties throughout any given sample of the mixture. In Chemistry, all solutions are considered to be a homogeneous mixture.

In this scenario, the chemical formula which represents a homogeneous mixture is aqueous hydrogen chloride, HCl(aq). The aqueous hydrogen chloride is a homogeneous mixture of water and hydrogen chloride. This ultimately implies that, aqueous hydrogen chloride HCl(aq) is a solution of hydrogen chloride in water and it is commonly referred to as Hydrochloric acid.

Given by the chemical equation;

HCl(aq) + H_{2}O(l)  →  H_{3}O^{+} (aq) + Cl_{−}(aq)

8 0
3 years ago
If a combination reaction takes place between potassium and chlorine what is the product
zepelin [54]
It would be potassium chloride or kcl
4 0
3 years ago
A student shines a flashlight on a mirror.
irga5000 [103]

Answer:

a

Explanation:

mirrors reflect light

7 0
3 years ago
Read 2 more answers
Other questions:
  • Help me please please someone help me please
    12·2 answers
  • Which type of radiation particle, emitted from a nuclear reaction, is most similar to a helium nucleus?
    7·2 answers
  • Why did the Mt. Pinatubo eruption result in global temperatures dropping almost two degrees?
    14·1 answer
  • Gaseous ethane CH3CH3 reacts with gaseous oxygen gas O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O. What is the
    10·1 answer
  • Infer that if all atoms contain the same subatomic particles, what makes the atoms of different elements different?
    10·2 answers
  • The concentration of glucose inside a cell is 0.12 mM. Outside the cell the concentration of glucose is 12.9 mM. Calculate the c
    15·1 answer
  • A boiler is used to heat steam at a brewery to be used in various applications such as heating water to brew the beer and saniti
    13·1 answer
  • Im really tired and csant think plz help
    12·1 answer
  • A LA TEMPERATURA DE 35°C, UNA MUESTRA DE DIOXIDO DE CARBONO OCUPA UN VOLUMEN DE 350 ML. ¿Qué CAMBIO DE VOLUMEN SE PRODUCIRA SI L
    8·1 answer
  • Currently doing a quiz, who ever can help me first gets brainliest!
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!