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
How many grams of P4O10 would be produced when 0.700 mole of phosphorus is burned?
AysviL [449]
We can solve the equation and show the solution below:

Oxygen atomic number is 16.
Phosphorus atomic number is 32.

We have the molecular weight:
Molecular weight = (31*4) + (16*10)
Molecular weight = 284 grams/mol

Solving for the grams:

0.4 mole (for P4) * (1 mol P4O10/1 mol P4) * (284 grams P4O10/1 mole P4O10)
Total grams = 113.6

The answer is 113.6 grams.
8 0
3 years ago
How many megagrams are in 90.532 g?
Fed [463]
9.0532e-5 should be correct! hope this helps
7 0
2 years ago
Which object has particles with the most kinetic energy?
Pavlova-9 [17]

Answer:

b

Explanation:

because it is moving so it has kinetic energy

6 0
2 years ago
How did henry moseley arrange his attempt at the Periodic Table?
Monica [59]

Answer:

When Moseley arranged the elements in the periodic table by their number of protons rather than their atomic weights, the flaws in the periodic table that had been making scientists uncomfortable for decades simply disappeared.

Explanation:

Make sure to edit so you don't get copy-writed

8 0
2 years ago
An unknown substance visually appears to be a white powder. The substance is analyzed in the laboratory and its melting point is
wlad13 [49]

Answer:

See explanation

Explanation:

The substance under analysis must be a polar organic substance of high molecular mass. We must remember that as the magnitude of dispersion forces increases with increase in molecular mass, the melting point increases accordingly. Also polar organic substances have very high melting points due to the presence of polar bonds in the molecule..

Hence the intramolecular forces in the substance are covalent bonds while the intermolecular forces are both dispersion forces and dipole forces.

The substance may likely be 1,2,3,4,6,7,8-Heptachlorodibenzo-p-Dioxin which a white powder and melts at 264 °C.

5 0
2 years ago
Other questions:
  • Which phase of matter consists of particles that are held together but have the ability to flow past each other?
    12·2 answers
  • Use standard reduction potentials to find the equilibrium constant for the following reaction at 25°C: 2Ce4+(aq) + 2Cl−(aq) ⇌ 2C
    10·1 answer
  • How many liters of ammonia gas can be formed from 54.1 liters of hydrogen
    10·1 answer
  • Starting with the stock solution of 6.0 M, how many milliliters of 6.0 M sulfuric acid are needed to make 450 mL of 1.2 M soluti
    12·1 answer
  • Can someone help me on this please ?
    12·1 answer
  • What is the formula for the compound for the compound dinitrogen pentoxide
    12·2 answers
  • 9. Which of the following is a chemical property of water at 4°C? its temperature its state its color
    15·1 answer
  • Balancing Chemical Equations & Identifying Chemical Reactions
    9·1 answer
  • 3 What is the number located in the top right hand corner of the atomic symbol of an ion with 16 protons, 17 neutrons and 14 ele
    15·1 answer
  • A solution is made by dissolving 15.0 mL of oil in enough gasoline to give 50.0 mL of solution. What is the % (v/v) of oil in th
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!