Molecular Mass

First write down the BALANCED reaction eq'n.

Octane + oxygen = Water + Carbon Dioxide.

2CH3(CH2)6CH3 + 25O2 = 18H2O + 16CO2

The molar ratios are 2:25 :: 18:16

So '2' moles of octane produces 18 moles of water.

So by equivlance

0.468 : x :: 2 : 18

Algebraically rearrgange

x = (0.468/2) X 18 =>

x = 0.234 x 18 = >

x = 4.212 moles water produces.

To find the mass of 9.15 × 10²⁴ molecules of methanol (CH₃OH), we first need to determine the molar mass of methanol, which is approximately 32.04 g/mol. Using Avogadro's number (6.022 × 10²³ molecules/mol), we can convert the number of molecules to moles: ( n = \frac{9.15 \times 10^{24}}{6.022 \times 10^{23}} \approx 15.19 ) moles. Finally, we calculate the mass: ( \text{mass} = n \times \text{molar mass} = 15.19 , \text{mol} \times 32.04 , \text{g/mol} \approx 486.4 , \text{g} ).

how many moles are represented by 1.51 x 10^24 atoms Pb

Well, honey, in one mole of copper II sulfate, there are 4 moles of oxygen atoms. So, if you're asking about moles of oxygen molecules (O₂), then the answer is 8 moles. But if you're talking about individual oxygen atoms, then it's 4 moles. Either way, you've got a whole lotta oxygen hanging out with that copper II sulfate.

To determine the number of moles of water in 72.08g of H2O, we first need to calculate the molar mass of water (H2O). The molar mass of water is approximately 18.015 g/mol (2 hydrogen atoms with a molar mass of 1.008 g/mol each, and 1 oxygen atom with a molar mass of 16.00 g/mol).

Next, we use the formula: moles = mass / molar mass. Plugging in the values, we get moles = 72.08g / 18.015 g/mol ≈ 4 moles of water. Therefore, there are approximately 4 moles of water in 72.08g of H2O.

To find the moles of water, you need to convert the given number of water molecules to moles. One mole of any substance contains 6.022 x 10^23 particles (Avogadro's number). In this case, 2.60 x 10^23 water molecules is equal to approximately 0.43 moles of water (2.60 x 10^23 / 6.022 x 10^23).

The a.m.u. is defined as the fraction of 1/12 of an atom of the carbon-12 isotope. The value is pretty nearer to the mass of a hydrogen atom. Therefore, in every compound, the gram molecular weight is numerically equal to the molecular mass in atomic mass units. Therefore the gram molecular weight of NaOH is 40 g/mol.

When an electron moves from a lower to a higher energy level, it absorbs energy and jumps to a higher orbit. This process is known as excitation. The electron can then release this absorbed energy as light when it moves back down to a lower energy level.

The molar mass of silver is approximately 107.87 g/mol. Therefore, the mass of 2.6 moles of silver would be 2.6 moles x 107.87 g/mol = 280.3 grams.

The molecular mass of AlBr3 (aluminum bromide) is approximately 266.69 g/mol.

Carbon-12 is taken as the standard for calculating atomic or molecular mass because it is abundant in nature, has a stable nucleus, and is used as a reference for comparing the mass of other atoms or molecules. By assigning C-12 a mass of exactly 12 atomic mass units, scientists can accurately determine the relative mass of other elements.

To find the molecular mass if specific volume is given, you can use the ideal gas law. The ideal gas law relates the pressure, volume, temperature, and the number of moles of gas to the gas constant. By rearranging the ideal gas law equation and solving for the molecular mass, you can determine the molecular mass of the gas.

The molar mass of MgSO4.7H2O (magnesium sulfate heptahydrate) is calculated as the sum of the individual atomic masses of magnesium (Mg), sulfur (S), oxygen (O), and hydrogen (H). The molecular mass is approximately 246.47 g/mol.

2.80 moles of Na represents 2.80 times Avogadro's number of sodium atoms, which is approximately 1.69 x 10^24 atoms of sodium.

The term molecular mass is used for water because it exists as discrete molecules containing two hydrogen atoms and one oxygen atom. Aluminum chloride, on the other hand, does not exist as discrete molecules but as an ionic compound made up of aluminum and chlorine atoms held together by ionic bonds. Therefore, the term formula mass is used to describe the total mass of one formula unit of aluminum chloride.

The molecular mass of hydrogen sulfide (H2S) is 34.08 grams per mole.

Light is made up of particles called photons, which do not have mass and cannot be considered molecules. photons are considered to be particles without mass or volume that carry electromagnetic energy.

The molecular mass of adrenaline, also known as epinephrine, is approximately 183.21 g/mol.

The molecular mass of ZnCl2 (zinc chloride) is calculated by adding the atomic masses of the elements in the compound. The atomic mass of zinc (Zn) is approximately 65.38 g/mol and the atomic mass of chlorine (Cl) is approximately 35.45 g/mol. Therefore, the molecular mass of ZnCl2 is approximately 136.33 g/mol.

The relative molecular mass of CaCO3 (calcium carbonate) is approximately 100.09 g/mol.

The molecular mass of H2SO4 (sulfuric acid) is approximately 98.08 g/mol. This value is calculated by adding together the atomic masses of two hydrogen atoms, one sulfur atom, and four oxygen atoms in the molecule.

The average molecular mass of drugs can vary widely depending on the specific drug. However, most drugs have a molecular mass in the range of 100 to 1000 daltons.

If the number of moles of a gas doubles at constant pressure and temperature, the volume of the gas will also double according to Avogadro's law. This is because the volume of a gas is directly proportional to the number of moles present.

Yes, atomic mass can be used to determine molecular mass by adding up the atomic masses of all the atoms in the molecule. This calculation gives the total mass of the molecule in atomic mass units.