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
Alex_Xolod [135]
3 years ago
11

A radioactive sample has a half-life of 5 hours. What fraction of the sample will be left after 15 hours?​

Chemistry
1 answer:
DedPeter [7]3 years ago
6 0

Explanation:

hiiiii beautiful.........

You might be interested in
When objects of two different temperature are in contact, what happens?
Sonja [21]
Answer: C. the warmer object transfers heat energy to the cooler side
5 0
1 year ago
Read 2 more answers
a cylinder with a movable piston contains 250 cm3 air at 10°C. if the pressure is kept constant, at what temperature would you e
soldi70 [24.7K]

Answer:

T₂ = 169.89 K

Explanation:

Given data:

Initial volume = 250 cm³

Initial temperature = 10°C (10+273.15 K = 283.15 K)

Final temperature = ?

Final volume = 150 cm³

Solution:

The given problem will be solve through the Charles Law.

According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.

Mathematical expression:

V₁/T₁ = V₂/T₂

V₁ = Initial volume

T₁ = Initial temperature

V₂ = Final volume  

T₂ = Final temperature

Now we will put the values in formula.

V₁/T₁ = V₂/T₂

T₂ = T₁V₂/V₁  

T₂ = 283.15 K × 150 cm³ /  250 cm³

T₂ = 42472.5 K. cm³  / 250 cm³

T₂ = 169.89 K

5 0
3 years ago
Calculate the mass of 4 moles of sodium hydroxide
harina [27]

Answer:

Mass = 160 g

Explanation:

Given data:

Number of moles of sodium hydroxide = 4 mol

Mass of sodium hydroxide = ?

Solution:

Formula:

Mass = number of moles × molar mass of sodium hydroxide

Molar mass of sodium hydroxide = 40 g/mol

Mass = 4 mol × 40 g/mol

Mass = 160 g

4 0
2 years ago
Explain the difference between the reacts and products of a chemical reaction
Alika [10]
Reactants are what is changed in the chemical reaction. They go before the arrow when you wrote the equation. Products are what is formed when the chemical reaction occurs. Products always contain the same elements as the reactants, but they might be rearranged because of the reaction. In this picture, you can see that the reactants go before the arrow, and the products go after.

5 0
3 years ago
Someone help please i am stuck on this
daser333 [38]

Answer:

33.5

Explanation:

the lowest point which is 33.5

pls mark brainlest

8 0
3 years ago
Other questions:
  • Liver cells require a great deal of energy which cell organelles would you except to appear in large number as a result
    14·1 answer
  • Suppose the mass spectrum of a hypothetical monatomic element X contains a signal at mass number 13 and another of identical hei
    15·2 answers
  • What is 3O2 in science
    13·1 answer
  • Enter the number of unique signals in the 1H NMR spectrum of ethanol. Assume that the hydroxy proton does NOT exchange with the
    9·1 answer
  • What are the names of the components (each shown with a leader and a line) of a circuit shown in the diagram? Please help!!!!
    8·1 answer
  • What mass of sodium sulfate is needed to make 2.5 L of 2.0 M solution?
    13·1 answer
  • The state of matter with the slowest moving atoms is _
    6·1 answer
  • Write the formular of the compound formed when element D and oxygen react together​
    6·1 answer
  • What is the hydroxide ion concentration of a solution with a pH of 4?
    11·1 answer
  • For the reaction shown, find the limiting reactant for each of the initial quantities of reactants.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!