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
Yanka [14]
2 years ago
8

Which component of the galaxy is the arrow pointing to? a galaxy with the arrow pointing to the space between the fixed points o

f light in the sky Dust Gravity Moons Sun
Chemistry
2 answers:
VARVARA [1.3K]2 years ago
8 0

A would be correct

srry u had to wait long

guapka [62]2 years ago
5 0

Answer:

A

Explanation:

You might be interested in
Calculate the moles of Cu in 7.4×1021 atoms of Cu.
IceJOKER [234]
1 moles -------- 6.02x10²³ atoms
 ?? moles ----- 7.4x10²¹ atoms

moles = 7.4x10²¹ / 6.02x10²³

 = 0.01229 moles

hope this helps!
5 0
3 years ago
A vessel of volume 22.4 dm3 contains 2.0 mol h2 and 1.0 mol n2 at 273.15 k initially. all the h2 reacted with sufficient n2 to f
yanalaym [24]
Volume = 22.4 dm3
n = 2 mol of H2
n = 1 mol of N2
Temperature = 273.15
All H2 reacts
reaction
N2 + 3H2 = 2NH3
1:3 ratio
Calculation:
N2 initial - N2 reacted = Final N2
1 - 2*(1/3) = 0.3333 mol of N2 left
H2 = 0 left
NH3 formed = 2/3*1 = 2/3 = 0.666
Total mol:
0.3333 + 0.666 = 1 mol
Apply the equation : 
PV = nRT
P = nRT/V = 1*0.0082*(273.15)/(22.4) = 0.0999924 atm
PH2 = 0
PN2 = 1/3*0.0999924 = 0.0333308 atm
PNH3 = 2/3*0.0999924 = 0.0666616 atm
Answer is 0.0666616 atm
7 0
3 years ago
The metal lithium has a diagonal relationship with the metal magnesium. true or false.
emmasim [6.3K]
False   .........................................                                                   
6 0
3 years ago
You need to produce a buffer solution that has a pH of 5.31. You already have a solution that contains 10. mmol (millimoles) of
Karolina [17]

Answer:

37 mmol of acetate need to add to this solution.

Explanation:

Acetic acid is an weak acid. According to Henderson-Hasselbalch equation for a buffer consist of weak acid (acetic acid) and its conjugate base (acetate)-

pH=pK_{a}(acetic acid)+log[\frac{mmol of CH_{3}COO^{-}}{mmol of CH_{3}COOH }]

Here pH is 5.31, pK_{a} (acetic acid) is 4.74 and number of mmol of acetic acid is 10 mmol.

Plug in all the values in the above equation:

5.31=4.74+log[\frac{mmol of CH_{3}COO^{-}}{10}]

or, mmol of CH_{3}COO^{-} = 37

So 37 mmol of acetate need to add to this solution.

3 0
3 years ago
Which part of the atom is directly involved in chemical changes? A. the electron B. the energy levels C. the nucleus D. the char
7nadin3 [17]
The part of the atom that is involved in chemical changes is A. electron. The electrons that are in the most outer shells are called valence electrons which are easily removed or shared to form bonds. Valence electrons are related to the number of valence electrons
8 0
3 years ago
Other questions:
  • Which is true for every atom of an element?
    7·1 answer
  • If you accidentally spill phosphorus-32 onto your shoe, how long would it take before 99.9% of the radioactive material has deca
    10·1 answer
  • Write a sentence using the term atomic theory
    8·2 answers
  • Which one of the following statements is correct? View Available Hint(s) Which one of the following statements is correct? Adeni
    12·1 answer
  • Which describes an atom that has fewer neutrons than protons and more electrons than protons?
    10·1 answer
  • Convert 110.4kPa into torr
    8·1 answer
  • A 800 kg car zooms away from a red light with an acceleration of 7.6 m/s2. What is the
    7·1 answer
  • How many grams of Fe2O3 are formed when 51.3 grams of iron, Fe, react completely with oxygen, O2?
    9·1 answer
  • Propose a synthesis of phenylacetaldehyde from bromobenzene
    14·1 answer
  • Balance the N-14(d,n) nuclear equation for radioisotope production in PET. This means to
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!