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
How many grams of ammonium chloride (NH4Cl) would be required to make a saturated solution in 1000 grams of water at 50 degrees
Pavel [41]
<span>Since,
1000 grams of water = 1000 mL of water</span><span>
So, 
At any of the given temperature:
</span>1000 mL = 10 x 100 mL
<span>
moles of NH4Cl = 53.5/53.49
                          = 1.0 m
                          = 1.0 mol/Kg
Delta T = 2 x 1.86 x 1.0
             = 3.72 c
             = - 3.72 °C</span>
3 0
3 years ago
a flight stimulator that helps astronauts prepare for a shuttle launch is an example of a (an) ______.
Dimas [21]
A flight simulator that helps astronauts prepare for a shuttle launch is an example of a Scientific Model.
3 0
3 years ago
Read 2 more answers
How many milliliters of sterile water for injection should be added to a vial containing 5 mg/mL of a drug to prepare a solution
jonny [76]

Answer:

7mL of sterile water is the initial amount of the concentrated solution is 3mL

Explanation:

In this problem, the vial must be <em>diluted </em>from 5mg/mL to 1.5mg/mL, that means the solution must be diluted:

5mg/mL / 1.5mg/mL = 3.33 times

If the initial amount of the drug in the vial is 3mL, the final volume must be:

10mL

That means the volume of water that should be added is:

10mL - 3mL:

<h3>7mL of sterile water is the initial amount of the concentrated solution is 3mL</h3>
4 0
3 years ago
Now examine salts containing the halide anions, cl- and br-. Most of these are soluble. What two cations listed lead to insolubl
tatiyna

Ag+ and Pb+2 are two cations that are suggested as producing insoluble halide salts when studying salts containing the halide anions, cl- and br-. First, the charge's number is provided.

Neutral binary salts, also referred to as halide salts, are mixtures of metals and non-metals. The non-metal behaves in a reduced oxidation state at all times. They are the outcome of mixing a hydroxide and hydracid. halide salts of haloids are produced by the reaction of a hydroxide and a hydracid.

Ions are cations with positive charges. They emerge when the electrons of an elemental metal are lost. However, they don't lose any protons; they only lose one or more electrons. To denote a cation, the charge is superscripted following the element name or chemical formula.

Learn more about halide salts here

brainly.com/question/20815131

#SPJ4

8 0
1 year ago
How much heat will be released when 0.750 moles of carbon monoxide (CO) react in an excess of oxygen gas? 2CO(g) + O2(g) → 2CO2(
lara31 [8.8K]

Answer:

A.566 kJ

B.424 kJ

C.212 kJ

D.755 kJ

Answer: C

Explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • List five physical properties?
    13·2 answers
  • Molar mass of barium nitrate is 261.35 what is the mass of 5.30 x 10^22 formula units
    10·1 answer
  • I’m driving down the highway at 75.0 miles/hour, how fast is that in m/seconds?
    6·1 answer
  • Which percentage is in the appropriate range for a snack to be considered a “good source” of nutrients?
    11·2 answers
  • How did buddhism spread to china?​
    7·1 answer
  • The empirical formula of a molecule is C2H6. In an experiment, the Molar mass of the molecule was determined to be 90.21g/mol. U
    14·1 answer
  • What is the answer to this question?
    5·1 answer
  • What are the 4 chambers and what is the function of each?
    9·2 answers
  • Write bohrs atomic theory postulate​
    9·1 answer
  • Which is the correctly balanced chemical equation for the reaction of KOH and H₂SO4?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!