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
Degger [83]
3 years ago
14

I need help! how many moles are in 3.4*10^-7 grams of silicon dioxide, SiO2. I got 2.0^17 but I think it's wrong :(

Chemistry
1 answer:
blondinia [14]3 years ago
8 0
Molar mass SiO2 = 28 + 32 = 60 

<span>so moles sand = 3.4 x 10-7 / 60</span>
You might be interested in
Calcium forms ions with a charge of +2. Iodine forms ions with a charge of -1. Which of the following would represent an ionic c
astra-53 [7]

 The   formula that would represent an ionic  compound  that is composed of calcium and iodide ions  is   CaI2

 Explanation

Ionic compound  CaI₂ is formed  when Calcium form cation ( <em>a positively charged ion</em>) by losing 2 electrons while two iodine atoms form  anion ( <em>a negatively charged ion</em>)  by  gaining one electron each.

When writing down   formula of ionic compound, the formula  of cation  is written  first followed by anion  formula. therefore  Ca is written  first  followed by I.

The numeric subscript 2 after I(iodine) indicate that 2 atoms of iodine are involved  in bonding.

5 0
3 years ago
Why phosphorus forms 3 bonds in molecule such as PH3 and PCl3-
gregori [183]
Phosphorous has three lone electrons that need pairing. Similar to how carbon has 4 lone electrons, and forms CH4
6 0
3 years ago
Read 2 more answers
Where is neon found in earth? South America? North America?
givi [52]
Neon is usually found in the form of a gas with molecules consisting of a single Neon atom. Neon is a rare gas that is found in the Earth's<span> atmosphere at 1 part in 65,000. I'm not 100% sure but i am pretty sure it is found in both places but more is in South America. Just incase, wait for someone else to answer.</span>
8 0
3 years ago
Name the following compound: HNO3
galben [10]
Im pretty sure it nitric acid
5 0
3 years ago
What is an ionic compound
Gwar [14]
Ionic compound is formed by negative and positive ions, these ions form ionic bond
6 0
3 years ago
Other questions:
  • Predict whether each of the following molecules is polar or nonpolar? 1. XeF4 3. CCl4 5. CH3Br
    10·1 answer
  • An atom of boron has an atomic number of 5 and an atomic mass of 11. The atom contains
    15·1 answer
  • Which is true according to the law of conservation of energy?
    13·2 answers
  • How do I turn 2 s into one in the products
    9·1 answer
  • The heat transfer depicted in the image is MOST likely
    13·2 answers
  • Convert the following sentence into an equation and balance it.
    6·1 answer
  • Explain the differences in the size of a metal or a non metal to a charged metal or a charged non metal ​
    15·1 answer
  • What is the change in enthalpy when 180 g of water vapor condenses at 100°C? (AH, = 40.67 kJ/mol)
    6·1 answer
  • What type of reaction is AB+C=CB+A
    11·1 answer
  • The part in the middle with a coil of wire wrapped around a metal shaft is part of an electric motor. What is it?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!