7.3x10^4 g
7.3x10^4 g
Boron (B) has a molar mass of approximately 10.81 g/mol. In BF3, there is 1 boron atom. To calculate the mass of boron in 5.00 grams of BF3, you would use the molar mass of boron to find that it contains approximately 1.46 grams of boron.
The mass of a boron atom is approximately 10.81 atomic mass units (amu). In grams, this would be about 1.80 x 10^-22 grams.
1.00*10-7 moles of boron is how many grams is this
Boron has a density of 2.34 grams per cubic centimeter. A link is provided. It also has a mass of 10.811 grams.
To calculate the number of grams of fluorine in 5 molecules of boron trifluoride, you need to first determine the molar mass of boron trifluoride (BF3). Boron trifluoride has one boron atom and three fluorine atoms, so the molar mass is ~ 67.8 g/mol. Since each molecule of boron trifluoride contains three fluorine atoms, the total mass of fluorine in 5 molecules would be 3 times the molar mass of fluorine (approximately 19.0 g/mol) times 5.
The atomic mass of boron is 10.811 while that of bromine is 79.904. Thus the ratio of the mass of bromine to the total mass of boron tribromide must be: 3(79.904)/[3(79.904) + 10.811] = 0.9568. The required mass of BBr3 thus is 11.8/0.9568 = 12.3 g, to the justified number of significant digits.
Each mole of boron atoms has a mass of 10.811 grams, as indicated by the gram atomic mass or weight of boron. Therefore, 585 moles has a mass of about 6.32 X 103 grams, to the same number of significant digits as 585.
The molar mass of boron is approximately 10.81 g/mol. To calculate the mass of 1 x 10^6 boron atoms, you divide 6.022 x 10^23 (Avogadro's number) by 1 x 10^6 to find the number of moles, which equals 0.001673 moles. Multiply this by the molar mass of boron to get approximately 0.0181 grams.
To calculate the number of neutrons in boron, subtract the atomic number from the atomic mass. The atomic number of boron is 5, and the atomic mass is around 10.81. Therefore, boron has approximately 6 neutrons (10.81 - 5 = 5.81).
10.81g This is found by looking at the atomic weight. The atomic weight refers to the mass of a singe atom in units of AMU (atomic mass units) and it also refers to the mass of one mole of the element in grams.
mass (g) = atomic wight / Avogadro's number Avo = 6.022x10^23