there are 4.5 moles
45 grams, since the atomic mass of water is 18g.18 * 2.5 = 45
It is a solution whose strength and quantity are given .
C6H12O6 + 6O2 --> 6CO2 + 6H2O 45 grams C6H12O6 (1 mole C6H12O6/180.156 grams)(6 moles CO2/1 mole C6H12O6)(44.01 grams/1 mole CO2) = 66 grams carbon dioxide produced ==========================
0.012 mol
its used as its a chaotropic salt..dat is it melts the agarose piece containing the DNA fragment when incubated at 45-55 degress Celsius
45 mg contains approximately 1.956 moles of atomic sodium.
45/94.2 is 0.4777 moles
stp= 22.4 dm3, 1L = 1 dm3 1mole ---> 22.4dm3 xmole ---> 45dm3 45/22.4 = 2.001 moles
The moles number of water 12; the chemical formula is KAl(SO4)2.12H2O.
Nope
.45 mol
45 grams, since the atomic mass of water is 18g.18 * 2.5 = 45
The molecular mass of fluorine gas, F2 is 2(19.0) = 38.0Amount of F2 = mass of sample/molar mass = 9.5/38.0 = 0.25mol There are 0.25 moles of fluorine in a 9.5g pure sample.
40-45%
45 Mg/ 2%
IT COST UP TO 35 TO 45 CENTS
We just use stoichiometry. The molecular formula for sodium chloride is NaCl. First we must find the molar mass of NaCl, using the molar masses of each element in the compound. So, 23 g/mol of Na + 36 g/mol of Cl = 58 g/mol of NaCl. Next, we take the amount of grams you have (26 grams) and divide it by the molar mass of NaCl to find the number of moles in your sample. 26 g NaCl / 58 g/mol of NaCl = .45 mol NaCl. Finally, we convert that to the number of NaCl molecules in a mole by multiplying .45 moles by 6.02x1023. This equals 2.7x1023 molecules. Because, technically, NaCl is made up of 2 atoms per molecule, you can multiply that by 2, giving 5.7x1023 atoms.