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
White raven [17]
3 years ago
14

Define what is halflife​

Chemistry
1 answer:
zhuklara [117]3 years ago
8 0

Half-life is the time it takes for a substance to lose half of its pharmacological, physiological, or radiological activity.

You might be interested in
a compound has a percent compostion of carbon equal to 48.8383%, hydrogen equal to 8.1636%, and oxygen equal to 43.1981%. what i
Margarita [4]

Answer:

C₂H₃O

Explanation:

From the question given above, the following data were obtained:

Carbon (C) = 48.8383%

Hydrogen (H) = 8.1636%

Oxygen (O) = 43.1981%

Empirical formula =?

The empirical formula of the compound can be obtained as follow:

C = 48.8383%

H = 8.1636%

O = 43.1981%

Divide by their molar mass

C = 48.8383 / 12 = 4.07

H = 8.1636 / 1 = 8.1636

O = 43.1981 / 16 = 2.7

Divide by the smallest

C = 4.07 / 2.7 = 2

H = 8.1636 / 2.7 = 3

O = 2.7 /2.7 = 1

Thus, the empirical formula of the compound is C₂H₃O

8 0
3 years ago
A neutral solution has a(n) _______ amount of hydroxide ions compared to hydrogen ions.
erastovalidia [21]
The answer is 'equal'. Hydroxide ions are OH- and Hydrogen ions are H+. Have you noticed they're opposite charges? Positive + negative = neutral. That's all there is to it :)
4 0
3 years ago
What term is used to define when a substance reacts quickly with oxygen to produce light and heat?
sergejj [24]

Answer:

I think it's a

Explanation:

not sure hssjkskaakakskksskksqoqkakskzksjsj

7 0
3 years ago
Read 2 more answers
Fe2O3 + 2Al = 2Fe + Al2O3 is this a redox reaction
katovenus [111]

Answer:

<h3>2Al+ Fe2O3 gives 2Fe + Al2O3. The given reaction is a redox reaction. As oxidation and reduction are taking place simultaneously.</h3>

Explanation:

like this...Identify oxidation and reduction with their agents:

<h3>•2Al+ Fe2O3 →2Fe + Al2O3</h3>

<h3>•Fe2O3 is reduced to Fe whereas Al is oxidized to Al2O3</h3>

<h3>In the above reaction:</h3>

<h3>Oxidizing agent:Fe2O3</h3>

<h3>Reducing agent:Al</h3>

I hope it's help you (◠‿・)—☆

5 0
2 years ago
Which would most likely be joined by an ionic bond?
KATRIN_1 [288]
An ionic bond is composed of a cation and anion, which are charged ions. You cannot have atoms with ionic bonds, because there is no opposite attraction between charges due to atoms having a net nuclear charge of zero. Therefore, a cation and anion would most likely be joined by an ionic bond.
3 0
3 years ago
Other questions:
  • When electricity is produced from coal, the chemical energy in coal is first changed to thermal energy. True or False
    6·1 answer
  • Which solution is the most concentrated?
    6·1 answer
  • Write the ions present in a solution of na3po4. express your answers as chemical formulas separated by a comma. offset subscript
    14·1 answer
  • Which type of chemical reaction occurs in 2KClO3 Right arrow. 2KCl + 3O2
    5·1 answer
  • A student takes an object with an accepted mass of 120.0 grams and masses it on their
    10·1 answer
  • What are the two main phases of cell division
    7·1 answer
  • Density is a measure of
    13·1 answer
  • Please answer! will mark brainiest for correct answer!
    11·2 answers
  • Which functional group is found in an amine?
    10·2 answers
  • Water evaporates and becomes a gas when from the sun
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!