300 g sulfur is equivalent to 9,357 moles.
The mass of 4,00 moles of iron is 223,38 g.
A molecule of ethanol has 2 carbon atoms, 6 hydrogen atoms and 1 oxygen atom. Their atomic masses are 12, 1 and 16 in order. By adding of the masses, the molecular mass of ethanol is 12x2+1x6+16=46u.
This amount may be different because rust is not a clearly definite compound.
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
Esters are less polar than carboxylic acids, and water is a very polar solvent (like dissolves like). Furthermore, acids can ionize and form hydrogen bonds in water, etc.
The boiling point of water is only 100 C, so water can not be used to heat the flask containing Isobutyl. Heat the flask containing the Isobutyl directly or heat it in a substance that has a boiling point above 108 C
Acceleration = Force/mass.
The pressure is 2,02 atmospheres.
The number of moles is 2,997.
Because an ion is not a molecule.
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) 78.5Â°C methoxymethane (without hydrogen bonding) -24.8Â°C The hydrogen bonding in the ethanol has lifted its boiling point about 100Â°C.
For molecules of similar polarity, larger molecular masses would equate to higher boiling points. This is because molecules with larger masses would have stronger intermolecular van der Waals forces.
We need 8 moles potassium chloride.
The formula mass is used to express the mass of ionic compounds and molecular mass for the molecules or covalent compounds.
5 moles of helium He atoms is equivalent to 20,013 g.
The answer is 4,09 moles.
CH = 13 so 78/13 = 6 The compound is C6H6 = benzene (most likely).
29,0 g of calcium is equal to 0,723 moles.
This compound may be dioxane - C4H8O2.
Actually the mass does change by exactly the amount that E = Mc**2 predicts. But in chemical reactions the change in mass is many orders of magnitude smaller than the accuracy of the best standard chemical balances. The change has been measured and verified on custom built ultraprecise balances, but such equipment is far beyond the budget of ordinary laboratories and unnecessary for their needs.
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