To calculate the density of a gas, we need to know the molar mass and the pressure and temperature conditions. Without this information, we cannot determine the density of the gas.

To calculate the molecular mass of P3S4, we need to determine the atomic masses of phosphorus (P) and sulfur (S). The atomic mass of phosphorus is 30.97 amu, and the atomic mass of sulfur is 32.07 amu. Since there are three phosphorus atoms and four sulfur atoms in P3S4, we multiply the atomic masses and add them together: (3 x 30.97) + (4 x 32.07) = 327.74 amu. Therefore, the molecular mass of P3S4 is 327.74 amu.

206

350.3 moles

C6H12O3 is a molecular formula that contains 54.5% C, 9.1% H, and 36.4% O and has molar mass of 132 amu.

Water is composed of two hydrogen and an oxygen atom. Their respective atomic numbers are 1 and 16. Therefore the RMM of water is 2x1+16=18.

Avogadro's constant expresses the number of elementary entities per mole of substance and it has the value 6.02 × 1023 .

Thus there will be 2.5 times Avogadro's constant molecules of C6H12O present.

And as each molecule contains 12 atoms of Hydrogen

The number of atoms of Hydrogen present will be 12 times the product of 2.5 times Avogadro's constant.

= 1.806 * 1025 atoms of hydrogen.

Cs = 132.91 g/mol

1 kg = 1000g

595kg x (1000g/1kg) x (1mol/132.91g) = 4476.713566 = 4.48 x 10^3 mol Cs

1,24 moles of beryllium is equal to 11,175 g.

1 mole in 250 ml and 4 moles in 1 liter or 1000 mls

By adding up the mass numbers of Na (23) and Cl (35 or 37). It is determined by the total of numbers of protons (11 and 17 respectively) and of neutrons (12 and 18 or 20), however it is not a sensible exercition to do, you cannot calculate anything with this figure.

The molar mass of dichlormethane is 84,93 g.

About 68 kDa

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

Cu(s) + 2AgNO3(aq) ---> Cu(NO3)2(aq) + 2Ag(s)

So you need half as many moles of Cu. Thus 5.8/2 = 2.9 moles of Cu are needed.

666 is atomic weight of diamond

table 3.7 in prentice hall chemistry That's going to depend on the pressure of the sample

as well as its temperature.

Well first you should determine the molecular mass of your glucose molecule, then you should divide the molecular mass of all the carbon by this, if I recall correctly.

Should look something like

(12X6) / ((6X12)+(12X1)+(6X16))

All multiplied by 100 to make it a percentage.

Gives something like 40% which sounds like the right answer looking at the question.

249.72 g/mol

36.5

120.0609 g/mol

This depends on pressure and temperature: at standard values (1 atm. 25oC) all gases take 22.4 Litre per mole:

So, 2.5 x 22.4 L = 56 L

4,5 moles of copper are equivalent to 285,957 g.

The atomic mass of Potassium is 39 and that of Sulfur 32. The formula for Potassium Sulfide is K2S therefore the molecular weight of Potassium Sulfide is (39 * 2) + 32 = 110. Therefore one mole of Potassium Sulfide weighs 110 grams. Therefore 3.3 moles of Potassium Sulfide weigh 110 * 3.3 = 363 grams.