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
Ivanshal [37]
3 years ago
11

Hydrazine, N2H4, is a weak base and is used as fuel in the space shuttle.

Chemistry
1 answer:
FrozenT [24]3 years ago
3 0

Answer:

Kb = 1.6*10^-6

Explanation:

The given reaction is:

N2H4(aq)+H2O(l)\rightarrow N2H5+(aq)+OH-(aq)

The ionization constant of the base Kb is given as:

Kb = \frac{[N2H5+][OH-]}{[N2H4]}------(1)

The pH = 10.66

therefore, pOH = 14-pH = 14-10.66 =3.34

[OH-] = 10^{-pOH} =10^{-3.34} =4.57*10^{-4} M

[N2H5+] = [OH-] = 4.57*10^-4M

[N2H4] = 0.133 M

Based on eq(1)

Kb = \frac{[4.57*10^{-4}]^{2}}{[0.133]}=1.6*10^{-6}

You might be interested in
Assign each species to the expression that most accurately describes the basic units of that substance. categories: single atoms
Temka [501]
Atoms are the smallest form of the substance. examples of atoms are in elemental forms such as copper, helium, silver. Diatomic molecules are made up of identical atoms. Examples are I2.. F2 and Br2. Formula units are those compounds that are made up of two or more elements such as -No2, KMnO4,<span>C3H8, MgCl2, HgBr2, Ba(OH)2</span>
6 0
3 years ago
Read 2 more answers
Radiation is spontaneously emitted from hydrogen-3 nuclei, but radiation is not spontaneously emitted from hydrogen-l nuclei or
miv72 [106K]

Answer : Option 1) nuclei of H^{1} and nuclei of H^{2} only.


Explanation : Radiation is spontaneously emitted from nuclei of H^{3} because this isotope of hydrogen is highly radioactive as compared to other isotopes of hydrogen namely; nuclei of H^{1} and nuclei of H^{2}.


They have much stable nucleus as compared to nuclei of H^{3}.


The more it is unstable the more radiations will be emitted from its nucleus.

5 0
3 years ago
Read 2 more answers
How does a chemist count the number of particles in a given number of moles of a substance?
jolli1 [7]
The chemist the count the number of particles (Atoms, Molecules or Formula Unit) in a given number of moles of a substance by using following relationship.

                              Moles  =  # of Particles / 6.022 × 10²³

Or,

                              # of Particles  =  Moles × 6.022 × 10²³

So, from above relation it is found that 1 mole of any substance contains exactly 6.022 × 10²³ particles. Greater the number of moles greater will be the number of particles.
8 0
3 years ago
A temperature of 37C is equivalent to a temperature of
ss7ja [257]
Answer 98.6 Fahrenheit
8 0
3 years ago
Read 2 more answers
Why do you think large differences in temperature between the wet bulb and dry bulb thermometers are possible only at higher tem
olganol [36]

Answer:

This is the temperature indicated by a moistened thermometer bulb exposed to the air flow. The evaporation is reduced when the air contains more water vapor. The wet bulb temperature is always lower than the dry bulb temperature but will be identical with 100% relative humidity.

Explanation:

7 0
3 years ago
Other questions:
  • What does the illustrated symbol on the element key mean?
    6·1 answer
  • What subatomic particle is responsible for combining the atoms together to form a new substance?
    14·2 answers
  • Which of these describes an endothermic reaction?
    11·1 answer
  • What is the concentration of OH − and pOH in a 0.00066 M solution of Ba ( OH ) 2 at 25 ∘ C? Assume complete dissociation.
    14·1 answer
  • Can someone plzzz help with numbers 14,15,#1 plzzz show work too cuz I don’t understand this plzzz help me
    5·1 answer
  • Proteins are large molecules. They enter a cell through
    9·1 answer
  • What is the formula for calculating the energy of a photon?
    11·1 answer
  • The atomic number of polassium and
    15·1 answer
  • Which description accurately represents a water molecule? (1 point)
    8·2 answers
  • (9) A penny contains 22,452,000,000,000,000,000,000 zinc atoms and also contains
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!