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

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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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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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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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We need 8 moles potassium chloride.

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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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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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Copper sulfite is an ionic compound. It is a lattice formed from Copper(II) and Sulfate(IV) ions. It is slightly soluble in water.

Cu2S2O3 is made of Cu2+ ions and S2O3^2- ions. In an aqueous medium, Cu2S2O3 breaks into Cu2+ and S2O3^2- ions. So Cu2S2O3 is an ionic compound.

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

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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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HCOOH = 46

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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 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 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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The density of air is 1.20 g/L. Use the mass formula (density x volume) to get your answer. 1.20 g/L x 5L equals 6g. mass=6g

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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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The molecular mass of a sulfur molecule is 32 g.

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To express rage and frustration with self and world.

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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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In a balanced chemical equation the number of molecules or atoms are specified.

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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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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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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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In Ca(OH)2 there is 1 Ca, 2 O, and 2H
Ca = 40 g
O = 16 x 2 = 32
H = 1 x 2 = 2
Total mass = 40 + 32+ 2 = 74 g
%O by mass = 32/74 (x100) = 43.2%