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
MAVERICK [17]
3 years ago
15

What is the density of the black hole

Chemistry
2 answers:
Karolina [17]3 years ago
7 0

the density of a black hole is 22.61 g/cm3 i think

Mila [183]3 years ago
6 0
With a density of 22.61 g/cm^3
You might be interested in
For all of the following questions 20.00 mL of 0.200 M HBr is titrated with 0.200 M KOH.
HACTEHA [7]

Answer :

The concentration of H^+ before any titrant added to our starting material is 0.200 M.

The pH based on this H^+ ion concentration is 0.698

Explanation :

First we have to calculate the concentration of H^+ before any titrant is added to our starting material.

As we are given:

Concentration of HBr = 0.200 M

As we know that the HBr is a strong acid that dissociates complete to give hydrogen ion H^+ and bromide ion Br^-.

As, 1 M of HBr dissociates to give 1 M of H^+

So, 0.200 M of HBr dissociates to give 0.200 M of H^+

Thus, the concentration of H^+ before any titrant added to our starting material is 0.200 M.

Now we have to calculate the pH based on this H^+ ion concentration.

pH : It is defined as the negative logarithm of hydrogen ion concentration.

pH=-\log [H^+]

pH=-\log (0.200)

pH=0.698

Thus, the pH based on this H^+ ion concentration is 0.698

3 0
3 years ago
Plz help this was due yesterday butttttt i didn’t want to do it...
sergejj [24]
So what am I suppose to answer here?
8 0
3 years ago
Read 2 more answers
How many parts per million of lead is found in 250 ml of water if there is 1.30g of lead in the water? 1ml=1g
SSSSS [86.1K]

Answer:

5200 ppm

Explanation:

As per the definition, parts per million of a contaminant is a measure of the amount of mass of contaminant present per million amount of the solution. It is denoted by ppm.

Given in the question,

Water = 250 ml = 250 g

Lead = 1.30 g

So,

ppm of Lead = \frac{Lead}{Water} \times 10^6 = \frac{1.30}{250} \times 10^6 = 5200 ppm

So, as calculated above, there is 5200 ppm of lead present in 250 ml of water.

6 0
2 years ago
Anybody can help? <br> - 20 points
strojnjashka [21]

Answer:

I think its carbon because of all the chemicals being used in that air.

7 0
3 years ago
What events caused the formation of most islands in the South Pacific?
WINSTONCH [101]
D. Volcanoes formed most of them through eruption.
7 0
3 years ago
Other questions:
  • How does a change in temperature affect the kinetic energy of the particles in a reaction?
    8·1 answer
  • CO2 dissolves in water to form carbonic acid: H2CO3 &lt;---&gt; H+ + HCO3-Ka1 = 4.3 x l0^-7 HCO3- &lt;---&gt; H+ + CO3-2 Ka2 = 4
    14·1 answer
  • What type of bond exists between the atoms in a molecule of N2?
    8·1 answer
  • Slimotosis
    11·1 answer
  • I WILL GIVE BRAINLIEST ANSWER IN 5 MINS
    6·1 answer
  • Oxidation and reduction reactions (redox) involve the loss and gain of electrons. Half-reactions are a way for us to keep track
    12·1 answer
  • .........................helpplsplspls.....................
    7·2 answers
  • Hi who wanna be friends :)<br> DONT DO IT BC OF THE POINTS :|
    12·2 answers
  • Are all elements atoms and are all atoms elements?
    11·2 answers
  • Which two statements are scientific claims?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!