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
dybincka [34]
3 years ago
12

How many moles of Boron are present in 20g of borax (sodium tetraborate)?​

Chemistry
1 answer:
stira [4]3 years ago
5 0
20 grams of borax contains (20.0g) / (201 g mol -1) =0.10 mol of borax.

Therefore 0.40 mol of borax
You might be interested in
An exacuted glass vessel weighs 50 g when empty, 148g when filled with an liquid of density o.989/cc and 50.5 g whenfilled with
Zanzabum

MW of gas : 124.12 g/mol

<h3>Further explanation  </h3>

Density is a quantity derived from the mass and volume  

Density is the ratio of mass per unit volume  

With the same mass, the volume of objects that have a high density will be smaller than objects with a smaller type of density  

The unit of density can be expressed in g/cm³ or kg/m³  

Density formula:  

\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}

ρ = density  

m = mass  

v = volume  

glass vessel wieight = 50 g

glass vessel + liquid = 148 ⇒ liquid = 148 - 50 =98 g

volume of glass vessel :

\tt V=\dfrac{m}{\rho}=\dfrac{98}{0.989}=99.1~ml

An ideal gas :

m = 50.5 - 50 = 0.5 g

P = 760 mmHg = 1 atm

T = 300 K

\tt PV=\dfrac{mass(m)}{MW}.RT\\\\MW=\dfrac{m.RT}{PV}\\\\Mw=\dfrac{0.5\times 0.082\times 300}{1\times 0.0991}=124.12~g/mol

3 0
3 years ago
What type of particle is emitted by each type of radioactive decay?
olya-2409 [2.1K]

C. alpha = nucleus of a helium atom

beta = electron

gamma = photon

4 0
2 years ago
Read 2 more answers
Reaction of hypochlorous acid and ammonia is product-favored system at equilibrium. Answer A: Reaction of hypochlorous acid and
pickupchik [31]

Answer:

A. True

B. False

Explanation:

Reaction between hypochlorous acid and ammonia does not yields a Ph value of 7.00 , this value is defined to water and no other reaction can yield exactly this Ph value. The acid reaction will give a Ph value below 7 while a base reaction will give Ph value of above 7.

7 0
2 years ago
What is one factor that contributes to seasons occurring in Pennsylvania?
JulijaS [17]
B. the tilt of the Earth on it's axis

The moon affects the tides by it's gravitational pull on Earth. So the moon has no affect on the earth's seasons. The distance from earth from the sun only affects the ability of Earth to sustain liquid water because earth is in something scientists like to call the "Goldilocks Zone" This has no affect on the seasons. However, the angle at which the sun's light hit the earth does effect seasonal changes and it's tilt does change.
3 0
3 years ago
What is the greatest source of radiation most humans are exposed to
Scilla [17]
The greatest source of radiation is radon gas
8 0
2 years ago
Other questions:
  • PLEASE HELP ME ASAP PLEASE!!!!
    6·1 answer
  • Which statement best describes the direction of heat flow by conduction between two samples of the same material?
    11·2 answers
  • The bond formed when electrons are shared is called a(n) _____.
    10·2 answers
  • 7. Do you have any reservations about taking this course? Explain. How can I help?
    15·1 answer
  • g Calculate the [OH-] from the results of your titrations. Explain your calculations2. Calculate the [Ca2+]. Explain your calcul
    15·1 answer
  • how many grams of water can be produced when 65.5 grams of sodium hydroxide react with excess sulfuric acid.
    15·1 answer
  • A salt contains only magnesium and one of the halide ions. A 0.0776-g sample of the salt was dissolved in water, and an excess o
    6·1 answer
  • How many electrons are in an atom with the electron<br> configuration of 1s 2s 2p 3s!?
    15·1 answer
  • I) If 8.87g of As2O3 is used in the reaction and 5.33 g of As is produced, what is the percent
    14·1 answer
  • How would someone describe a passing grade
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!