Molecular Mass

This method depends on a lot of things going right. One assumption is that while the liquid is volatile enough to vaporize at the elevated temperature, it is not so volatile that a significant amount will be lost to evaporation through the orifice as the container cools. The vapor is also assumed to behave ideally at the temperature and pressure at which it occupies the container. The amount of error implicit in this approximation varies from compound to compound and is tied to the variables which create deviations from ideal behavior: molecular volume and intermolecular forces. Generally speaking, the larger these are, the greater the error in the determination. The situation is further complicated by the interaction of these two factors. For example, a small molecule may have significant intermolecular forces (hydrogen bonding perhaps) but a large molecule may have comparatively weak forces (like dispersion forces). Combinations run between these extreme examples making predictions of error from this source difficult.

There is another problem with the basic method which is more easily addressed. When the container is "empty", i.e., before the liquid is added or the vapor forms, there is a fixed amount of air determined by the volume, temperature and pressure in the container. This air has mass and contributes to the overall mass of the container assembly. But when the liquid is present it vaporizes to some extent determined by its vapor pressure at room temperature. The presence of this vapor forces out some of the air through the orifice since the internal pressure is equalized with the room pressure and the number of gas particles remains constant if the temperature and pressure remain constant. Thus when the container is massed again there is air missing that should be counted in the final mass if the mass of the condensed liquid is to be determined by difference. This results in an apparent mass of liquid that is too small which in turn makes the molar mass calculation too small.

The molecular mass of allegra (fexofenadine hydrochloride) is calculated by adding the atomic masses of each atom in the compound. By summing the atomic masses of C32H39NO4 HCl, the molecular mass of allegra is 538.63 g/mol, to two decimal places.

206

The molecular mass of lactose (C12H22O11) is calculated by summing the atomic masses of each element in the compound. The atomic masses of carbon (C) is approximately 12.01 g/mol, hydrogen (H) is approximately 1.01 g/mol, and oxygen (O) is approximately 16.00 g/mol. By adding up the atomic masses of each element (12 carbons, 22 hydrogens, and 11 oxygens), you can determine the molecular mass of lactose to be around 342.3 g/mol.

The molecular mass of oleic acid is 282.46 grams per mole.

The molecular mass of palmitic acid is 256.43 g/mol.

The molecular mass of 2-pentanone (C5H10O) is 86.13 g/mol.

The name diphosphorus pentoxide indicates that there are (exactly) five oxygen atoms in each molecule. Therefore, 3.45 mol contains 17.25 mol of oxygen atoms. However, at standard temperature and pressure, oxygen exists in the form of divalent molecules. Therefore, if the question pertains to oxygen under such conditions, the correct answer is 8.62 mol, to the justified number of significant digits.

Atomic mass for carbon,hydrogen and oxygen are 12,1 and 16 respectively.since the molecular formula of vitamin K is C31H46O2, then the respective atomic mass for each element are substituted in the molecular formula. That is,the total number of carbon present is 12 multiplied by 31 which gives 372,the total number of hydrogen present is 1 multiplied by 46 which gives 46,and finally the total number of oxygen present is 16 multiplied by 2 which gives 32.The total addition of all these gives the molecular mass 450g.

answer 450.7

I just thought it was 1.48 g/cm3 because that is the density of a chloroplast. Hope this helps.

Amino acids like Glycine tend to exist mainly as Zwitterions in solution or solid state. This means that strong electrostatic attractions between opposite charges arise and potentially leads to HIGH melting points (temperatures).

The mass of five liters of air at 20 degrees Celsius can be calculated using the ideal gas law equation (PV = nRT), where P is pressure, V is volume, n is the number of moles, R is the gas constant, and T is temperature in Kelvin. You would need to know the pressure of the air to calculate the mass accurately.

The molecular mass of vitamin C (ascorbic acid) is 176,1241 and the chemical formula is C6H8O6.

False. Compounds that are similar to water in molecular mass can exist in various states of matter depending on their chemical properties. For example, compounds like ethanol and methanol, which have similar molecular masses to water, can exist as liquids at room temperature.

To find the molecular formula of carbon monoxide (CO), first find its empirical formula. The empirical formula is CO (1:1 ratio of atoms). Since the molecular mass of CO is 28.01 g/mol, and carbon's molar mass is 12.01 g/mol, the mass of oxygen in CO is 28.01 - 12.01 = 16 g/mol. Since the molecular mass of oxygen is 32.00 g/mol, CO's molecular formula is CO2.

We use the term formula mass for ionic compounds because they do not exist as discrete molecules like covalent compounds. Instead, ionic compounds exist as a three-dimensional array of ions arranged in a crystal lattice. Therefore, the term formula mass better reflects the overall mass of the compound, considering all the atoms and ions present in its formula unit.

To find the molecular formula from the empirical formula, we need to know the molar mass of the empirical formula. In this case, the empirical formula's molar mass is 88. To find the molecular formula, we divide the given molecular mass (176) by the empirical formula's molar mass (88) to get 2. This means the molecular formula of Vitamin C is twice the empirical formula, so the molecular formula is C6H8O6.

The gram molecular mass of H2SO4 is approximately 98 grams per mole. This is calculated by adding up the atomic masses of the elements in the compound: 2 hydrogen atoms (2 g/mol), 1 sulfur atom (32 g/mol), and 4 oxygen atoms (64 g/mol).

C20 = 12.01 x 20 = 240.2 grams
H30 = 1.008 x 30 = 30.24 grams
O = 16.00 x 1 = 16.00 grams
Total = 286.44 grams/mole or 286.44 amu/per molecule

The molecular formula for styrene is C8H8. This is derived by multiplying the empirical formula (CH) by a factor of 8 to get the molecular formula. Styrene consists of 8 carbon atoms and 8 hydrogen atoms.

The rate of diffusion is inversely proportional to the square root of the molecular mass of the gas. Since the unknown gas diffuses 0.25 times as fast as helium, it means the square root of the molecular mass of the unknown gas is 4 times that of helium, thus the molecular mass of the unknown gas is 16 times that of helium, which is approximately 64 g/mol.

Without additional information, it is impossible to determine the molecular mass of the blue molecules based solely on the molecular mass of the yellow molecules. Each type of molecule has its own unique molecular mass, and it cannot be inferred from other molecules.

The molecular mass of water (H2O) is 18, which means the total mass of one oxygen atom and two hydrogen atoms is 18. Since the atomic mass number of hydrogen is 1, the atomic mass of oxygen can be calculated as 16 (18 - 2).