Molecular Mass

Molecular mass measures the mass of a molecule. It is measured by adding together the atomic masses of atoms the molecule is made of.

1,424 Questions
Molecular Mass

Molar mass of Iron 3 carbonate?

Iron 3 carbonate or Ferric carbonate is Fe2(CO3)3 its Molecular mass is 56x2 + (12+16x3)3 = 292

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Molecular Mass

What is the molecular mass of sodium fluoride?

Sodium has a relative atomic mass of 22,989 769 28(2) g/mole.

Fluorine has a relative atomic mass of 18,998 403 2 (2) g/mole.

Sodium fluoride (NaF) = 22,989 769 28 + 18,998 403 2 =

41,988 172 48 g/mole.

NaF is an ionic compound which exists as crystal lattice therefore the term FORMULA MASS is more accurate as compare to MOLECULAR MASS

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Molecular Mass

How do you calculate molecular mass of an isomer?

The same way you calculate the molecular mass of any compound.

Alternatively, if you know the mass of one isomer, you don't need to do any calculations. All isomers having the same formula have the same mass.

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Auto Parts and Repairs
Timing and Firing Orders
Ford F-150
Molecular Mass

Why are the firing orders different for the different manufacturers since all V8s do not fire the same?

This is based off the cam and crankshaft design. when the piston hits top dead center with both valves closed it fires to ignight the fuel. the determines when the valves open and close.but to sum it up each manufacture has a patent on their motor design and it can not be copied. but the old Chevy 350 Oldsmobile 350 and Pontiac as well as the dodge 318 did have the same firing order.

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Chemistry
Atoms and Atomic Structure
Molecular Mass

How many moles of KCI would be dissolved in 4 liters of water to make a 2 Molar solution?

eight

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Molecular Mass

Is molecular mass and molecular size related?

Not exactly, although they can be. If two molecules are both composed of the same elements, the one that has more atoms in it, the one with more atoms will have a larger molecular mass, and a larger molecular size. However, different elements weigh different amounts.

Take for example the molecule octane, which is an ingredient in gasoline, with formula C8H18. Octane is relatively large, and has a molecular mass of approximately 114 grams per moles. However, a single atom of the element lead, Pb, is much smaller than the molecule octane, and yet the molar mass of lead is 207.2 grams per mole! So it is much heavier, and yet smaller.

On the other hand, hydrogen gas (H2) has a molar mass of 2 grams per mole, and chlorine gas (Cl2) has a molar mass of 71 grams per mole, and Cl2 is indeed much larger than H2.

And so you can see that it depends on the composition of the things you are comparing.

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Chemistry
Elements and Compounds
Molecular Mass

How are the empirical and molecular formulas for a compound related?

A molecular formula is identical to the empirical formula, and is based on quantity of atoms of each type in the compound.

The relationship between empirical and molecular formula is that the empirical formula is the simplest formula, and the molecular can be the same as the empirical, or some multiple of it. An example might be an empirical formula of C3H8. Its molecular formula may be C3H8 , C6H16, C9H24, etc. Looking at it the other way, if the molecular formula is C6H12O6, the empirical formula would be CH2O.

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Chemistry
Elements and Compounds
Molecular Mass

Is Cu2S2O3 ionic or molecular?

Copper thiosulfate is an ionic compound.

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Molecular Mass

What is the molecular mass for NaH2PO4?

A molecular mass is found by adding all of the masses of the atoms for that molecule. In NaH2PO4, we have:

Na: 1 atom x 23amu/atom = 23

H: 2 atoms x 1.0 amu/atom = 2

P: 1 atom x 31amu/atom = 31

O: 4 atoms x 16amu/atom = 64

Add those together, and NaH2PO4 has a molecular mass of... 120.

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Molecular Mass

What is the molecular mass of methanoic acid?

HCOOH = 46

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Chemistry
Atoms and Atomic Structure
Molecular Mass

What concentration unit is measured in moles of solute per kilogram of solvent?

The unit is mol/kg; molality is not a unit, it is a measure of concentration.

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Chemistry
Atoms and Atomic Structure
Molecular Mass

How does the size and number of moles increase risk for malignant melanoma?

The actual number of moles increases risk, but the size of the moles needs be considered. Those with 10 larger moles of over 1 cm (0.4 in.) are at more risk than those with a higher number (50-99) of smaller moles.

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Molecular Mass

What is molecular mass of heavy hydrogen?

Molecular mass of heavy hydrogen(deuterium) is 4 a.m.u. it's atomic mass = 2 a.m.u.

Alternatively it can be stated that 1 mole of molecular hydrogen weighs 4 grams.

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Molecular Mass

Why is the term molecular mass applied to water but the term formula mass applied to aluminum chloride?

molecular formula is referred to water because they are covalent compounds while formula mass for aluminum chloride because they are ionic compounds

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Molecular Mass

What is the molecular formula of a compound having the empirical formula of CH2O and a molecular mass of 180.15amu?

Find the molar mass of CH2O, which is roughly 30amus

Then divide the molecular mass of 180.15amus by 30 = 6

Multiply each element by 6 to give C6H12O6

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Molecular Mass

How do you calculate the molecular mass of calcium nitrate?

Ca(NO3)2

Add up the atomic masses of Ca, with that of 2 N's and 2x(3 O's):

Molecular mass is 40.08 + 2*14.01 + 6*16.00 = 164.10a.m.u.

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Molecular Mass

What is the gram molecular mass of sulfur molecule?

The molecular mass of a sulfur molecule is 32 g.

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History, Politics & Society
Geometry
Genocide
Molecular Mass

What was the point of mass killings?

To express rage and frustration with self and world.

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Chemistry
Atoms and Atomic Structure
Molecular Mass

How many grams are contained in 4.56 moles of krypton Kr?

4.56 moles Kr x 83.798 g/mole = 382.119 grams = 382 grams (to 3 significant figures)NOTE: You should not use more than 3 significant figures since 4.56 moles limits the precision. Thus the answers of 381.66g and 382.1188 g are incorrect.

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Molecular Mass

Molecular mass of sodium oxide?

Atomic mass of sodium is 23. The atomic mass of oxygen is 16. Therefore the molecular mass of sodium oxide is 23x2+16=62u.


The atomic mass of oxygen is 16. Atomic mass of sodium is 23. Therefore the molecular mass of the given compound is 62 grams per mole.

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Molecular Mass

Is molecular weight the same as molecular mass?

Technically... not really. It would perhaps be more accurate to use the terms formula mass and molecular mass rather than formula weight and molecular weight. This because in physical terms, weight is a force while mass is a measure of the amount of substance in something.

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Molecular Mass

What is the empirical and molecular formulas in a compound that is 23 nitrogen and 77 oxygen and has a molecular mass of 124 gmole?

The question is missing something; I must assume that the compound is 23% N by mass and 77% O by mass. Starting with NO3 as an initial guess turns up 22.6% N, 77.4% O, which agrees with the above if we round off to two significant figures. It has a molar mass of 62, precisely half the stated molecular mass. One could presume a dimer of NO3, i.e., N2O6, which is hardly a common species but does appear in the literature.

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Chemistry
Elements and Compounds
Molecular Mass

What is the percent composition by mass of oxygen in Ca OH 2?

Oxygen accounts for 43.2%.

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Molecular Mass

What is the mass in grams molecular mass of H2SO4?

The mass in grams of one mole H2SO4 is: 98.079 g/mol (molar mass)

The mass in grams of one molecule H2SO4 is (molecule mass):

98.079 (g/mol) / 6.02214*10+23(molecules/mol) = 16.286*10-23 g/molecule

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Molecular Mass

What is the molecular mass of cytosine?

The molecular mass of cytosine is 111,10.

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