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
Kobotan [32]
3 years ago
6

Nncncncncncncncaaaaaaa

Chemistry
2 answers:
kenny6666 [7]3 years ago
5 0

nncncncncncncncnccnaaaaa

kirill [66]3 years ago
5 0
I agree hope this helps
You might be interested in
Archeologists can determine the age of artifacts made of wood or bone by measuring the amount of the radioactive isotope 14C pre
Ahat [919]

Answer: The age of the tool is 15539 years

Explanation:

Expression for rate law for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

where,

k = rate constant  

t = age of sample

a = let initial amount of the reactant = 100

a - x = amount left after decay process = \frac{15.5}{100}\times 100=15.5  

a) for completion of half life:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.  

t_{\frac{1}{2}}=\frac{0.693}{k}

k=\frac{0.693}{5730yr}=0.00012yr^{-1}

b) for 15.5 % of original amount

t=\frac{2.303}{0.00012}\log\frac{100}{15.5}

t=15539years

Thus age of the tool is 15539 years

8 0
3 years ago
The specific heat capacity of concrete is 0.880 J/g °C
LenaWriter [7]

Answer:

this is a required answer. look it once.

3 0
3 years ago
5. After a day of testing race cars, you decide to
kvasek [131]
Noice but I don’t get why was this necessary
8 0
3 years ago
In a position time graph, a steep slope indicates _____.
sweet-ann [11.9K]
Im pretty positive its A , hope this helps!
5 0
3 years ago
Read 2 more answers
Proposing an explanation for the changing colors of the sky is an example of a(n)
lara [203]

Answer : Hypothesis.

Explanation : Hypothesis is defined as the supposition or proposed explanation which can be made on the basis of limited available evidence as a starting point for further investigation. Here, in this question the proposed explanation for the changing colors of the sky is an example of a hypothesis.

A hypothesis has to be supported with scientific experiments which are reproducible by several experiments and test results have to be valid to be called as a scientific theory.

8 0
3 years ago
Read 2 more answers
Other questions:
  • An 8.5g Ice Cube is placed into 255g water.
    15·2 answers
  • Which of the following correctly shows a neutralization reaction between a hydronium ion and a hydroxide ion?
    11·2 answers
  • What are some examples of multi-celled organisms?
    14·2 answers
  • Help me fill in the blanks
    10·1 answer
  • If an electromagnetic wave has a frequency of 4.5 x 10^18 Hz, what is its wavelength? The speed of light is 3 x 108 m/s.
    7·1 answer
  • Which Of The Following Would Represent An Increase In Entropy
    13·2 answers
  • Among the elements of the main group, the first ionization energy increases
    7·2 answers
  • Solve the following problem and select the correct answer: (4.5 x103)(3.5 x102)
    7·1 answer
  • Alkynes undergo many of the same reactions that alkenes do.<br><br> a. True<br> b. False
    8·2 answers
  • For each ionic compound formula, identify the main group to which X belongs: (c) X2SO4.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!