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
crimeas [40]
3 years ago
9

10 pts.Please help me with my Chemistry question. :'(plz.​

Chemistry
1 answer:
shutvik [7]3 years ago
6 0

Answer:

dang this hard I don't understand...

You might be interested in
Approximately 30% of the earth’s fresh water is stored in– A lakes. B streams. C groundwater. D living things.
kirill115 [55]
C ground water hope this is helpful
7 0
3 years ago
Uranium-238 decays to lead-206 with a half-life of 4.5 x 109 yr. Determine how much uranium-238 decays in milligrams (to three s
Mamont248 [21]

Answer:

2.15 mg of uranium-238 decays

Explanation:

For decay of radioactive nuclide-

                        N=N_{0}.(\frac{1}{2})^{\frac{t}{t_{\frac{1}{2}}}}

where N is amount of radioactive nuclide after t time, N_{0} is initial amount of radioactive nuclide and t_{\frac{1}{2}} is half life of radioactive nuclide

Here N_{0}=4.60 mg, t=4.1\times 10^{9}yr and t_{\frac{1}{2}}=4.5\times 10^{9}yr

So,N=(4.60mg)\times (\frac{1}{2})^{\frac{4.1\times 10^{9}}{4.5\times 10^{9}}}

so, N = 2.446 mg

mass of uranium-238 decays = (4.60-2.446) mg = 2.15 mg

3 0
3 years ago
Illustrate two different objects with before and after scenes. One with high speed but no acceleration and one with low speed an
Fittoniya [83]

Answer:Rate of change of Velocity per unit time” & definition of Velocity is “Rate of change of Distance per unit Time”. It means that , when acceleration is 0 then , velocity is constant. In short whatever may be the Velocity, if it remains constant then we say that acceleration is zero.

5 0
3 years ago
Read 2 more answers
Please help on the questions that is left blank!! Due soon and will mark brainliest
34kurt

Answer: The strength of an acid or alkali depends on the degree of dissociation of the acid or alkali in water. The degree of dissociation measures the percentage of acid molecules that ionise when dissolved in water. He could use universal indicators or litmus paper for this.

i hope this helps you!

3 0
2 years ago
What is the correct classification of a mixture in which both a solid and liquid are visible?
Setler [38]

The answer is D.

"a heterogeneous mixture and a suspension"

6 0
3 years ago
Other questions:
  • Please Help Me!!
    10·1 answer
  • Which kind of substance accepts an electron pair?
    13·2 answers
  • Which SI units can be used to describe an object’s volume?
    15·1 answer
  • how many milliliters of 0.200 m fecl3 are needed to react with an excess of na2s to produce 2.75 g of fe2s3 if the percent yield
    11·1 answer
  • Predict which surface will melt ice faster. Wood or metal? Why?
    10·2 answers
  • How are atoms of the same element with different mass numbers called?
    6·1 answer
  • How is the concept of “heat” related to the law of conservation of energy?
    5·1 answer
  • 10. What two effects can the wrong pH have on an enzyme?
    14·1 answer
  • How to tell the difference between a physical and chemical change
    13·1 answer
  • True or False:
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!