Graphite is a form of carbon, so the question is basically asking how many moles of carbon are in 18.0 grams of carbon.
One gram of carbon contains 12.01 moles. This can be found on a Periodic Table. 18.0 grams of carbon must therefore have 18 times 12.01, or 216.18, moles of carbon.
1 gram carbon (1 mole C/12.01 grams) = 0.08 moles carbon ===============
18 grams of water contain 1 mole. so 1 gram contains 1/18 moles of water.
The molar mass of potassium hydrogen phthalate (KHP) is approximately 204.23 g/mol. Therefore, in 1 gram of KHP, there is approximately 0.00489 moles (1/204.23).
For this you need the atomic mass of Al. Take the number of grams and divide it by the atomic mass. Multiply it by one mole for units to cancel.94.5 grams Al / (27.0 grams) = 3.50 moles Al
There are 1,000 micrograms in 1 gram.
1 gram carbon (1 mole C/12.01 grams) = 0.08 moles carbon ===============
18 grams of water contain 1 mole. so 1 gram contains 1/18 moles of water.
1 atom-gram of uranium = 238,02891 grams
moles = mass/Mr moles = 100/(23+16+1) moles of NaOH = 2.5mol
There is one mole in approximately 80 grams of bromine (Br). Therefore, in 1 gram of bromine, there would be approximately 1/80 mole, which is equal to 0.0125 moles.
34 moles of NaCl is equivalent to 1 986,95 g.
1 g silicon is equal to 0,0356 moles.
6.3(mol) * 13.83 (g·mol−1)= 87.1 gram BH3
The molar mass of potassium hydrogen phthalate (KHP) is approximately 204.23 g/mol. Therefore, in 1 gram of KHP, there is approximately 0.00489 moles (1/204.23).
It depends on what the substance is. For the elements, the number given as the atomic weight for an element on the Periodic Table is also the number of grams/mole. For example, lithium has an atomic weight of 6.941, so one mole of lithium would be 6.941 grams of lithium. In theory you can have a mole of anything -- electrons, ions, shoes, dollar bills, cars, etc...
For this you need the atomic mass of Al. Take the number of grams and divide it by the atomic mass. Multiply it by one mole for units to cancel.94.5 grams Al / (27.0 grams) = 3.50 moles Al
You did not describe the amount of potassium bicarbonate amount in grams in your question. But if you are about 1 gram of potassium bicarbonate it will be 0.0099 moles in one gram of potassium bicarbonate. 0.0199 moles in 2 grams of potassium bicarbonate.