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
SpyIntel [72]
3 years ago
7

What fraction of a sample of 6832ge, whose half-life is about 9 months, will remain after 2.9 yr ?

Chemistry
1 answer:
Viefleur [7K]3 years ago
4 0
<span>The half-life of 9 months is 0.75 years. 2.0 years is 2.0/0.75 = 2.67 half-lives. Each half-life represents a reduction in the amount remaining by a factor of two, so: A(t)/A(0) = 2^(-t/h) where A(t) = amount at time t h = half-life in some unit t = elapsed time in the same unit A(t)/A(0) = 2^(-2.67) = 0.157 15.7% of the original amount will remain after 2.0 years. This is pretty easy one to solve. I was happy doing it.</span>
You might be interested in
Identify which statement describes the following process. 2Ce + 3Cu2+ → 3Cu + 2Ce3+
Georgia [21]
Answer: <span>A-Ce is oxidized because it is losing electrons and Cu is reduced because it is gaining electrons</span><span>.

</span>There are two reactions in the equation, oxidation and reduction. A molecule that oxidized will lose electrons while the molecule that reduced will gain electrons. In this case, Cu2+ changed into Cu which means its oxidation number reduced from +2 into 0. Ce oxidation number increased from 0 into +3 
4 0
3 years ago
Which lists the elements in order from least conductive to most conductive?
Savatey [412]

Answer: Option (A) is the correct answer.

Explanation:

Nitrogen is a non-metal and it is known that non-metals do not conduct electricity. Thus, it will be least conductive out of the given options.

Whereas antimony (Sb) is a metalloid. Metalloid are the substance that show properties of both metals and non-metals. Thus, antimony will conduct electricity.

On the other hand, bismuth (Bi) is a metal hence, it will conduct electricity.

Thus, we can conclude that the order from least conductive to most conductive will be nitrogen (N), antimony (Sb), bismuth (Bi).

 

7 0
3 years ago
Read 2 more answers
Help please 20points
lions [1.4K]

Answer:

D

Explanation:

D is the answer because this is the only one having to do with genetics. Fox's genetics changed because it's environment changed.

6 0
3 years ago
Read 2 more answers
Which of the following would be found in both eukaryotic AND prokaryotic cells?
beks73 [17]
Nucleus ,endoplasmic reticulum
7 0
2 years ago
Read 2 more answers
Emily learns that ancient astronomers, such as Ptolemy, created a model of the solar system based only on what they could see wi
sergey [27]

Explanation:

Galileo found Venus went through the entire phase cycle, proving that she revolved completely around the Sun, as predicted by Copernicus in his heliocentric model. ... The phases of Venus could not be explained by Ptolemy's Geocentric Model. Galileo knew that the Roman Catholic Church was incorrect.

7 0
2 years ago
Other questions:
  • What is the temperature change on a 75.0 gram sample of mercury if 480.0 cal of heat are added to it? The specific heat of mercu
    8·1 answer
  • would you expect the N-O bond in HNO2 to be longer, shorter, or the same length as the N-O bonds in NO2^-
    7·1 answer
  • What do scientist measure by using a triple-beam balance
    11·1 answer
  • If this were a frictionless plane, what would be the ideal mechanical advantage?
    8·1 answer
  • Match the following vocabulary terms to their definitions. 1 . amount of energy required to change 1 gram of material from the s
    6·1 answer
  • How many atoms of each element are present in the nucleotide adenine:C9H14N3O8P
    9·1 answer
  • A civil engineer chooses to use wooden beams because they will sag before
    14·2 answers
  • The weather in an area is affected mostly by interactions between what elements?
    11·1 answer
  • An ideal gas is contained in a cylinder with a volume of 5.0x102 mL at a temperature of 30°C and a pressure of 710. Torr. The ga
    11·1 answer
  • Help help help :/<br><br> Please
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!