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
Kisachek [45]
3 years ago
5

The height of mercury in a closed-end manometer is 655 mm and the atmospheric pressure is 760 mm Hg.

Chemistry
1 answer:
Olenka [21]3 years ago
4 0

I don't understand

Explanation:

can u explain more

You might be interested in
Electromagnetic energy that travels in transverse waves which produces visible light is
Lubov Fominskaja [6]
Nuclear is the answer
8 0
2 years ago
A sample contains 25% parent isotope and 75% daughter isotopes. If the half-life of the parent isotope is 72 years, how old is t
alisha [4.7K]

The radioactive decay obeys first order kinetics

the rate law expression for radioactive decay is

ln\frac{[A_{0}]}{[A_{t}]}=kt

Where

A0 = initial concentration

At = concentration after time "t"

t = time

k = rate constant

For first order reaction the relation between rate constant and half life is:

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

Let us calculate k

k = 0.693 / 72 = 0.009625 years⁻¹

Given

At = 0.25 A0

ln(\frac{A0}{0.25A0})=0.009625  X time

time = 144 years

So after 144 years the sample contains 25% parent isotope and 75% daughter isotopes**

Simply two half lives

5 0
3 years ago
Read 2 more answers
A compound that has a sea of delocalized electrons has what type of bonding?
Anarel [89]

Answer:

Metallic Bonding

Explanation:

Metallic Bonding

In metallic bonds, the valence electrons from the s and p orbitals of the interacting metal atoms delocalize. That is to say, instead of orbiting their respective metal atoms, they form a “sea” of electrons that surrounds the positively charged atomic nuclei of the interacting metal ions.

8 0
2 years ago
What is the valency of element sulphur ​
NISA [10]
I am not to sure because I have not studied this
3 0
3 years ago
Read 2 more answers
(4.9 x 10-2) (9.80 x 102) =
Viktor [21]
The answer is 46981.2
5 0
3 years ago
Other questions:
  • What is the name of C2CI?
    10·1 answer
  • An ideal monatomic gas at 300 K expands adiabatically to twice its initial volume. Assume that the process is also quasistatic.
    9·1 answer
  • 7. Which 2 structures, in the digestive system, reabsorb water into the body? _____________________ and ______________________
    5·1 answer
  • One of the intermediates in the synthesis of glycine from ammonia, carbon dioxide, and methane is aminoacetonitrile, C2H4N2.
    7·1 answer
  • 28. The formula for magnesium nitride is____.<br> a. MgN<br> b. MgN3<br> c. Mg3N2<br> d. Mg2N3
    14·2 answers
  • In Environment A, trees are growing back and some of the larger animals are returning to a logged forest. In Environment B, lich
    11·2 answers
  • Question 7 (2 points)
    15·1 answer
  • Use the following steps to balance the redox reaction below:
    12·1 answer
  • 14. Why does a sea breeze blow from the ocean toward the shore?
    8·1 answer
  • an acid accepts H and removes them from a solution, is a solution where the water molecules are intact
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!