Here is a good site to find out all of the molar masses:http://www.etoolsage.com/Calculator/MolarMass.asp?CalText=3Mgo
But the answer to that is: 43.304
There are a total of 6 atoms present in 3MgO. This is because each formula unit of MgO consists of one magnesium atom and one oxygen atom, so for 3MgO, you would have 3 magnesium atoms and 3 oxygen atoms, totaling 6 atoms overall.
Potassium bromide is KBr, so by adding together their molar masses, we get 39+80=119gmol-1
Nitrogen is heavier than hydrogen but lighter than oxygen. In terms of molecular weight, nitrogen has a molar mass of about 28 g/mol, oxygen has a molar mass of about 32 g/mol, and hydrogen has a molar mass of about 2 g/mol.
It is a known fact : Molar heat of sublimation = molar heat of fusion + molar heat of vaporization so, molar heat of vaporization = molar heat of sublimation - molar heat of fusion Mv = 62.3 kJ/mol - 15.3 kJ/mol Mv = 47 kJ/mol.
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
The molar mas of H2 is 16; the molar mass of O2 is 32.
There are a total of 6 atoms present in 3MgO. This is because each formula unit of MgO consists of one magnesium atom and one oxygen atom, so for 3MgO, you would have 3 magnesium atoms and 3 oxygen atoms, totaling 6 atoms overall.
3Mgo+2B
If it's a double replacement reaction, then 3MgI2 + Al2O3 --> 3MgO + 2AlI3
Potassium bromide is KBr, so by adding together their molar masses, we get 39+80=119gmol-1
CaCl2 = MM(Ca) + 2*MM(Cl) = 40 + 35.5 * 2 =111
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To calculate the mass of CdS, we need to have the molar mass of CdS. Cadmium (Cd) has a molar mass of approximately 112.41 g/mol, and sulfur (S) has a molar mass of approximately 32.07 g/mol. Adding these together, we get a molar mass of approximately 144.48 g/mol for CdS. To find the mass of 2.50 x 10^-2 mol of CdS, we would multiply the number of moles by the molar mass: (2.50 x 10^-2 mol) x (144.48 g/mol) = 3.61 g of CdS.
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