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
GREYUIT [131]
3 years ago
15

The half-life of a certain element is 100 days. How many half-lives will it be before only one-eighth of this element remains?

Chemistry
1 answer:
Alexus [3.1K]3 years ago
6 0
After 1 half life its half the element
after 2 hl its quarter remaining
after 3 hl its half the quarter which is 1 eighth
after 3 half lifes
You might be interested in
A student needed to make 100.0 mL of 0.20M NaOH solution. How many grams of sodium hydroxide does the student need to weigh out
GuDViN [60]

Answer:

0.08 g

Explanation:

100.0 mL = 0.10 L

Multiply the volume by the molarity to find moles.

0.10 L × 0.20 M = 0.002 mol

Convert moles to grams.

0.002 mol × 40 g/mol = 0.08 g

4 0
3 years ago
Why is peer review an Important part of the scientific process
guajiro [1.7K]
Peer review involves subjecting the author's scholarly work and research to the scrutiny of other experts in the same field to check its validity and evaluate its suitability for publication. A peer review helps the publisher decide whether a work should be accepted.
7 0
3 years ago
How many solutions does the equation (3x + 7) = -4 have?<br>B. one<br>C. WO<br>D. infinitely many​
Eddi Din [679]

Answer:

Its One

Explanation:

hope it helps!

mark me brainliest :))

8 0
3 years ago
Explain the change in mass that occurs when the following substances are separately heated in open crucibles
aleksandrvk [35]

Answer:

your answer is (a) Copper Metal

Explanation:

7 0
3 years ago
Give the chemical symbol of an element in the third period (row) of the periodic table with two 3s electrons and no 3p electrons
lidiya [134]

Answer:

Mg  

Explanation:

The element in the third row with two 3s electrons and no 3p electrons is magnesium — Mg.

3 0
2 years ago
Other questions:
  • What would an effective conclusion need to include? In a scientific project.
    11·1 answer
  • In addition to carbon, hydrogen and oxygen, amino acids also contain?
    5·1 answer
  • What is best way to get salt out of salt water solution
    6·2 answers
  • What variable represents specific heat in the equation q = mct?
    11·1 answer
  • How do atoms form a new substance?
    7·1 answer
  • Help guys please question 3 in picture ASAP pls
    8·1 answer
  • 8. Which type of element requires the least amount of energy to remove an electron?​
    7·1 answer
  • Solve for Va<br><br>MaVa=MbVb​
    9·1 answer
  • Molar mass for caffeine
    11·1 answer
  • It is possible to make a model of a fission chain reaction with mousetraps and table tennis balls, with the balls placed on an a
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!