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
antiseptic1488 [7]
3 years ago
7

How moles are there in 15 grams of SiO2

Chemistry
1 answer:
BigorU [14]3 years ago
7 0
The answer you’re looking for is 0.250
You might be interested in
Which statement goes against the kinetic theory of gases?
AURORKA [14]

the answer is c. Gas molecules will never collide with the walls of the container

8 0
3 years ago
Read 2 more answers
Calculate the mass of liquid with density of 3.3 g/mL and a volume of 25 oz
love history [14]

Answer: 215

Explanation:

Volume doesn’t add up into ounces that’s mass only

3 0
3 years ago
2. if 0.20 m fe3 had been used instead of 0.020 m fe3 , how would the numerical value of the rate constant and the activation en
dezoksy [38]

the calculated value is Ea is 18.2 KJ and A is 12.27.

According to the exponential part in the Arrhenius equation, a reaction's rate constant rises exponentially as the activation energy falls. The rate also grows exponentially because the rate of a reaction is precisely proportional to its rate constant.

At 500K, K=0.02s−1

At 700K, k=0.07s −1

The Arrhenius equation can be used to calculate Ea and A.

RT=k=Ae Ea

lnk=lnA+(RT−Ea)

At 500 K,

ln0.02=lnA+500R−Ea

500R Ea (1) At 700K lnA=ln (0.02) + 500R

lnA = ln (0.07) + 700REa (2)

Adding (1) to (2)

700REa100R1[5Ea-7Ea] = 0.02) +500REa=0.07) +700REa.

=ln [0.02/0 .07]

Ea= 2/35×100×8.314×1.2528

Ea =18227.6J

Ea =18.2KJ

Changing the value of E an in (1),

lnA=0.02) + 500×8.314/18227.6

= (−3.9120) +4.3848

lnA=0.4728

logA=1.0889

A=antilog (1.0889)

A=12.27

Consequently, Ea is 18.2 KJ and A is 12.27.

Learn more about Arrhenius equation here-

brainly.com/question/12907018

#SPJ4

5 0
1 year ago
The photo shows nervous tissue.
Nikolay [14]

Answer:

The answer is c( to send signals to control the body)

7 0
3 years ago
Read 2 more answers
¿Por qué crees que es importante conocer nuestra condición económica antes de practicar actividades físicas regularmente?
gogolik [260]

Answer:

el ejercicio físico ayuda a gente a perder peso y reduce el riesgo de desarrollar algunas enfermedades. el ejercicio físico regular el reducen los riesgos de ciertas enfermedades como obesidad, diabetes tipo 2 e hipertensión el ejercicio físico puede ayudar a mantener el cuerpo en un peso saludable pero a veces algunos tienen enfermedades al corazón o asma y les afecta a ser demasiado práctica esa actividad

3 0
3 years ago
Other questions:
  • Which form of energy is non-renewable?<br> A. sunlight<br> B. fossil fuels<br> C. water<br> D. wind
    10·2 answers
  • Medical Assistant professional
    15·1 answer
  • The hybird orbitals used for bonding by xe in unstable xef2 molecules
    9·1 answer
  • The earth consist of how many chemical layers ?
    15·2 answers
  • Aluminum oxide (Al2O3) is a widely used industrial abrasive (known as emery or corundum), for which the specific application dep
    8·1 answer
  • A 9.0 mL sample of oxygen gas (Q) is stored at a pressure of 6.3 atm. If the pressure of the sample
    11·1 answer
  • The metabolic oxidation of glucose, C6H12O6, in our bodies produces CO2, which is expelled from our lungs as a gas:
    9·2 answers
  • Calculate the average atomic mass for X
    15·1 answer
  • The positively charged particles in an atoms nucleus is the A electron. B neutron. C proton. D isotope.
    8·1 answer
  • What is the mass of 3.5 mol of MgBr2?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!