answer.
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
mamaluj [8]
2 years ago
10

Molecules of SiO2 would have a mass of 12.40 g

Chemistry
1 answer:
creativ13 [48]2 years ago
7 0

Answer:

1.244x10^23 molecules

Explanation:

From Avogadro's hypothesis, 1mole of any substance contains 6.02x10^23 molecules.

This means that 1mole of SiO2 contains 6.02x10^23 molecules

1mole of SiO2 = 28 + (2x16) =28 +32 = 60g

If 1 mole(i.e 60) of SiO2 contains 6.02x10^23 molecules,

Therefore, 12.40g of SiO2 will contain = (12.40 x 6.02x10^23) / 60 = 1.244x10^23 molecules

You might be interested in
Find the age t of a sample, if the total mass of carbon in the sample is mc, the activity of the sample is a, the current ratio
kkurt [141]
should be 7.57*10^3 years
4 0
2 years ago
Neither dry soil nor pure water conducts electricity. But wet soil will conduct electricity. Explain why this happens?
kipiarov [429]

Pure water does not have enough ions to conduct electricity. A mixture of metals such as iron, zinc and copper in the wet soil can trigger electrolysis that requires excess energy in the form of over potential to conduct electricity. The excess energy is needed due to limited self-ionization of water. The wet soil then can conduct current when positive and negative ions are present. The water ions begin to flow from anode (positive electrode) to cathode (negative electrode) to be oxidize and produce electricity.

<span> </span>

4 0
2 years ago
SEP Use Models Why does the number of electrons in each principal energy shell increase as the number of the shell increases?
zlopas [31]

Answer:

See explanation

Explanation:

The number of electrons in each principal energy shell increases as the number of shells increases because more electronic orbitals become available to accommodate the electrons.

For instance, the n= 2 level only accommodates eight electrons in the s and p orbitals whereas the n=3 level accommodates 18 electrons in s, p and d orbitals respectively.

Each principal level accommodates 2n^2 electrons where n= the principal energy shell.

4 0
1 year ago
If one has a solution of 0.10 m silver nitrate and it is diluted by a factor of two, what is the new concentration
Angelina_Jolie [31]
Diluted by a factor of two means that we double the volume of the solution by adding an equal volume of the water.
if we diluted it by a factor of one so the new concentration = 0.1/2=0.05 M and diluted by a factor of two so, the new concentration will be 0.05/2 = 0.025 M
7 0
2 years ago
At what power of ten are we able to view the entire Earth in space?
umka21 [38]

Answer:

If I remember correctly it should be 10^7 meters.

Explanation:

7 0
2 years ago
Other questions:
  • Describe the process used to measure out a specific mass of a solid
    5·1 answer
  • Illustrate a model of a calcium atom including the number and position of protons neutrons and electrons in the atom
    14·1 answer
  • After recrystallization, the final weight of biphenyl is found to be 0.02 g. Assume that all steps were carried out correctly, n
    7·1 answer
  • When an athlete gets hurt they apply sometimes an instant cold pack to the injury. The instant cold pack works by mixing two che
    13·1 answer
  • A student wants to form 2‑hexanol using acidic hydration. He finds four alkenes in the inventory cabinet that could be possible
    12·1 answer
  • A piston containing 0.120moles of methane gas, CH4, has a volume of 2.12liters. If methane is added until the volume is increase
    6·1 answer
  • Rank the formation of the solutions A, B, and C from the most exothermic to the most endothermic. Rank the enthalpy of solution
    9·1 answer
  • Calculate the number of grams of Mg needed for this reaction to release enough energy to increase the temperature of 78 mL of wa
    10·1 answer
  • Analyze the example of this door knob wheel and axle.
    12·1 answer
  • The melting point of gallium metal is 29.76⁰C. If a piece of gallium is sliced into three parts, the melting point of each part
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!