0
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.
617 Questions
What is the molecular mass of O2?
The molecular weight of oxygen is 16. Its atomic symbol is O and atomic number is 8. It is a gas in its natural state.
The molecular structure for 2,2-dimethylbutane is C6H14.
How to get: 2,2-dimethylbutane
- first to help you write the molecular formula you need to write the structural formula
- 2,2- tells you to put both methyl groups on the second carbon atom in the structural formula
- the prefix di- tells you that there are two methyl groups
- the prefix but- tells you that the longest chain of carbon atoms is four
- the suffix -ane tells you that there are only single bonds throughout the compound
After getting your structual formula wrote down, count up all the carbon atoms. You should get six. Then count all your hydrogen atoms. You should get fourteen.
What is the molecular mass of hydrogen?
For H2 (natural occurring element Hydrogen) it is 2*1.00794 a.m.u = 2.01588 a.m.e
This means that 1.00000 mole H2 has a mass of 2.01588 grams
What is the molecular mass of ammonium sulfate?
Ammonium sulphate, (NH4)2SO4, is not a molecular compound. It is a an ionic compound with a formula unit. The mass of the formula unit is determined by doing the following:
N: 2 x 14.0067g = 28.0134g
H: 8 x 1.00974g = 8.06352g
S: 1 x 32.065g = 32.065g
O: 4 x 15.9994g = 63.9976g
_______________________
Total mass 132.140g
The mass of one formula unit of is 132.140g.
Dissolve 90 g of glucose in a small volume of water, and then add more water until the total volume of the solution is 1 L.
What is molecular mass for aldehyde?
The molecular mass of an aldehyde depends on the specific compound. For example, the molecular mass of formaldehyde (CH2O) is 30.03 g/mol, while the molecular mass of acetaldehyde (C2H4O) is 44.05 g/mol. You can calculate the molecular mass by adding up the atomic masses of all the atoms in the compound.
What is the relative molecular mass of methane?
Methane has four hydrogen atoms attached to a central carbon atom. Their atomic masses are 1 and 12 respectively. The RMM of methane is 4x1+12=16.
Are molar mass and molecular mass the same?
no, but sometimes they are equal.
Added:
Molecular mass differs from more common measurements of the mass of chemicals, such as molar mass, by taking into account the isotopic composition of a molecule rather than the average isotopic distribution of many molecules.
As a result, molecular mass is a more precise number than molar mass.
However it is more accurate to use molar mass on bulk samples. This means that molar mass is appropriate most of the time except when dealing with single molecules.
The molecular mass of sodium oxide Na2Ois?
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.
Ethanol has a higher boiling point because of chemical bonding. Ethanol is an alcohol. Specifically hydrogen bonding. Ethanol is an alcohol, Butane does not have anything except Carbon and Hydrogen. I found this on google:
Hydrogen bonding in alcohols An alcohol is an organic molecule containing an -O-H group. Any molecule which has a hydrogen atom attached directly to an oxygen or a nitrogen is capable of hydrogen bonding. Such molecules will always have higher boiling points than similarly sized molecules which don't have an -O-H or an -N-H group. The hydrogen bonding makes the molecules "stickier", and more heat is necessary to separate them. Ethanol, CH3CH2-O-H, and methoxymethane, CH3-O-CH3, both have the same molecular formula, C2H6O.
---- Note: If you haven't done any organic chemistry yet, don't worry about the names.
----
They have the same number of electrons, and a similar length to the molecule. The van der Waals attractions (both dispersion forces and dipole-dipole attractions) in each will be much the same. However, ethanol has a hydrogen atom attached directly to an oxygen - and that oxygen still has exactly the same two lone pairs as in a water molecule. Hydrogen bonding can occur between ethanol molecules, although not as effectively as in water. The hydrogen bonding is limited by the fact that there is only one hydrogen in each ethanol molecule with sufficient + charge. In methoxymethane, the lone pairs on the oxygen are still there, but the hydrogens aren't sufficiently + for hydrogen bonds to form. Except in some rather unusual cases, the hydrogen atom has to be attached directly to the very electronegative element for hydrogen bonding to occur. The boiling points of ethanol and methoxymethane show the dramatic effect that the hydrogen bonding has on the stickiness of the ethanol molecules: ethanol (with hydrogen bonding) 78.5°C methoxymethane (without hydrogen bonding) -24.8°C The hydrogen bonding in the ethanol has lifted its boiling point about 100°C.
What is the gram molecular mass of lithium bromide?
The gram molecular mass of lithium bromide is approximately 86.85 g/mol. This value is obtained by adding the atomic masses of lithium (6.94 g/mol) and bromine (79.90 g/mol).
Calculate NaCl in atomic mass?
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 compound has a 3:6:3 ratio of carbon, hydrogen, and oxygen atoms. Given the molecular mass of 120u, we can calculate the approximate percent composition of each element. The compound is likely C3H6O3, which simplifies to CH2O.
What is the relative molecular mass of vitamin B2?
u c... d formula 4 vitamin B2 is C(17)H(20)N(4)O(6)... so.. after calculating using d periodic table... d answer will b:198!!! answer is not really guaranteed.. but if ur desperate, then juz take it!! CHEMISTRY is jus so GREAT, don't u think so? im juz a 17 years old gal with ambition 2 b a genius................
When it has no other gasses mixed with it. For example, we breathe oxygen, but we do not breathe pure oxygen because it is mixed with nitrogen.
How do you make a penny float?
One way to make a penny float is by using the surface tension of water. Carefully place the penny on the surface of water in a bowl or cup, making sure it is placed flat. The surface tension of the water will allow the penny to stay afloat.
How do you find relative isotopic mass?
its the same as the mass number e.g. oxygen(-16) is 16, carbon-12 is 12 but carbon-13 is 13 because it has an extra neutron i think anyway
Really? I thought that the relative istopic mass was a ratio of the average atomic mass of the element compared to the average atomic mass of carbon. For example chlorine has an average atomic mass of 37 and carbons atomic mass is 12 so its 37 divided by 12 which is about 3:1.
How much elemental potassium is in 600 mg of potassium chloride?
Answer: I don't know exactly, but I'll give you a clue. It's probably at least 100 mg and up to 600 mg of elemental potassium, because you can buy 100 mg elemental potassium tablets and up to 166 mg potassium tablets (probably elemental potassium) right off the shelf in stores in Canada without a prescription or doctor's approval.
Answer: According to my calculations, using a formula provided to me from a pharmacist or assistant, there's 373 mg. of elemental potassium in 600 mg. of potassium chloride.
Molar mass of Iron 3 carbonate?
The molar mass of Iron(III) carbonate (Fe2(CO3)3) is calculated by adding the molar mass of iron (Fe) and three times the molar mass of carbonate (CO3). The molar mass of iron is approximately 55.85 g/mol, and the molar mass of carbonate is 60.01 g/mol. Therefore, the molar mass of Iron(III) carbonate is 291.88 g/mol.
Molecular mass is the sum of the atomic masses of all the atoms in a molecule. It is usually expressed in atomic mass units (amu) or grams per mole (g/mol). Molecular mass is used to determine the mass of a substance in chemical reactions and stoichiometry calculations.
How do you find the molecular formula from molar mass?
you have to test it first in an experiment, and then you have to write down your explanation of what you've just seen. In order to do that, you have to put 2 cups, label them with element B (E.B) and label the other cup with element A (E.A). put water in both and miz it with sugar, vinigar, salt, and cranberry juice. stir it and wa lah you just found the moluar mass. Moluar Mass=9+16.17/8*x-p*4^9
What was the point of mass killings?
Mass killings are perpetrated for a variety of reasons including political, religious, ethnic, or ideological motivations. Perpetrators often seek to achieve power, control, or revenge through such actions, instilling fear and asserting dominance over a population. Factors such as propaganda, historical grievances, and dehumanization of the victims can also play a significant role in fueling mass killings.
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.
What is the density of gas that has a gram molecular mass of 32 grams?
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.
What is the molecular mass of P3S4?
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.
