14 Answered Questions for the topic Molecules


Chemistry Word Problem #2. Please help asap!

The optimal level of fluoride in drinking water suggested by the World Health Organization in 1994 is between 0.5mg/L and 1.0mg/L. How many moles of sodium fluoride would have to be added to pure... more
Molecules Chemistry


Chemistry Word Problem. Please Help ASAP!

In 2001, the annual global production of hydrogen sulfate (mainly in the form of sulfuric acid) was 165 million tonnes. [1 tonne is defined as 1000 kg] Determine the number of MOLECULES of hydrogen... more


Chemistry Question Moles and Molecules

Seven moles of calcium hydroxide has_____ number of Molecules i was told the answer is 42.16*10^23 how did they get that as the answer? Thank you
Molecules Science Chemistry Mole


How many moles are in 8.6x10^26 molecules of H2O expressed in the correct number of significant figures?

A. 1,400 mil h2oB. 5.2x10^50 mol h2oC. 1.4 mol h20 D. 1.4x10^51 mol h2o


How big is an atom?

Molecules Science Chemistry


What kind of bond holds a water molecule together?

What kind of bond holds a water molecule together?
Molecules Formulas Ions


which name of Zn(OH)2 compound is right? Zinc Hydroxide, or Zinc(||) Hydroxide ?

i know that Zinc is one of the metals cations, but i don't know if it's a transition metal too. I asked my professor once and he preferred the second one Zinc(||) Hydroxide, but after i researched... more


Where are hydrogen bonds located in nucleic acids and carbohydrates?

I'm having trouble answering the following questions: “where would you find hydrogen bonds in nucleic acids?” “where would you find hydrogen bonds in carbohydrates”?
Molecules Chemistry Moles


chemistry problem

The natural abundance of 2H is 0.015% and that of 18O is 0.20%. How many 2H218O molecules are there in 1.0 moles of water?

Why does ClO3- only have 2 double bonds instead of 3?

I drew a Lewis Structure of ClO3- with 3 double bonds instead of 2 and 1 single bond but I'm wondering if it is a valid structure.  Is there a maximum amount of double bonds that Cl can make?


Atoms are a combination of molecules

Please tell me the answer to the question 


help with molecule

if there is a representation of a molecule found in mothballs, is it unsaturated, an aromatic compound, a hydrocarbon or all of these.   the molecule   has 6 sides with a circle in it.  Cl is at... more
Molecules Ap Biology


If you were a pharmaceutical researcher, why would you want to learn the three dimensional shapes of naturally occurring signaling molecules?

i understand that biological molecules can bind to each other forming the weak bonds and that they can mimic other molecules  but I don't see the importance In the 3D shapes 

Which Lewis Dot Diagram could represent a noble gas?

1. X (Two dots at top) 2. X (Dots all around except on right, only has one instead of two) 3. X (One on the right) 4. X (Dots all around except on left, only has on instead of two)

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