0
Add your answer:
Earn +20 pts
A one gram sample of aspirin contains 75.2 percent by mass of C9H8O4 How many moles of acetylsalicylic acid are in the sample?
To determine the number of moles of acetylsalicylic acid in the sample, we first need to calculate the molar mass of C9H8O4 (aspirin). Molar mass of C9H8O4 = (912) + (81) + (4*16) = 180.16 g/mol Next, we calculate the mass of acetylsalicylic acid in the sample: Mass of acetylsalicylic acid = 75.2% of 1 gram = 0.752 grams Finally, we find the number of moles using the formula: Number of moles = Mass / Molar mass Number of moles = 0.752 g / 180.16 g/mol ≈ 0.0042 moles Therefore, there are approximately 0.0042 moles of acetylsalicylic acid in the sample.
How many moles are in 95.0 gram of octane?
how many moles are in 95.0 gram of octane?
How many moles of water are on 72.08g of H2O?
The molecular formula of water is H2O. The atomic mass of H2O is 2(1.0) + 16.0 = 18.0Amount of H2O = mass of pure sample/molar mass = 75/18.0 = 4.17mol There are 4.17 moles of water in a 75 gram pure sample.
How many grams does 0.1 moles of lithium weigh?
"The amount of grams in one mole a substance" is themolar mass (the mass of 1 mole) of a substance.The molar mass of Lithium oxide (Li2O) is 29.881 g/molThe molar mass of a compound can be calculated by adding the molar masses of the compound's constituent elements.In this case :molar mass of lithium oxide= 2x(molar mass of lithium)+ (molar mass of oxygen)= 2x(6.941) + 15.999=29.881 g/molNotes:* the molar masses of elements are found in the periodic table. * Notice the subscript "2" in the chemical formula of lithium oxide , Li2O. This subscript indicates that two lithium atoms are involved in each lithium oxide atom.Hence, we multiply the molar mass of of lithium by "2" when calculating lithium oxide's molar mass.
How many moles of sodium in 6.5 gram of sodium?
The answer is 0,111 moles.
What is the number of atoms present in a 20 gram sample of Lithium?
To calculate the number of atoms in a sample of lithium, you first find the moles using the molar mass. Lithium's molar mass is approximately 6.94 g/mol. Then, use Avogadro's number (6.022 x 10^23) to convert moles to atoms.
What is the mass grams of 5.40 moles of lithium?
The molar mass of lithium is approximately 6.94 g/mol. Therefore, for 5.40 moles of lithium, the mass would be calculated as: 5.40 moles x 6.94 g/mol = 37.476 g. So, the mass of 5.40 moles of lithium is 37.476 grams.
How many moles of water molecules H2O are present in a 27 gram sample of water?
There are 1.5 moles of water molecules in a 27 gram sample of water. This is calculated by dividing the mass of the sample (27 grams) by the molar mass of water (18 grams/mol).
How much would 5.0 moles of lithium weigh in gram?
The atomic mass of lithium is approximately 6.94 g/mol. Therefore, 5.0 moles of lithium would weigh approximately 34.7 grams.
What is the total number of moles present in a 52.0 gram sample of NaN3 gram formula mass equals 65.0 mole?
To calculate the total number of moles in the 52.0 gram sample of NaN3, divide the given mass by the molar mass of NaN3. First, determine the molar mass of NaN3 by summing the atomic masses of its elements (sodium, nitrogen, and three times the atomic mass of nitrogen). Then, divide the mass of the sample by the molar mass of NaN3 to find the number of moles.
How many atoms of lithium are in 18.7 g?
The gram Atomic Mass of lithium is 6.941; this is the amount of lithium that contains Avogadro's Number of atoms. Therefore, in 18.7 g of lithium, there will be (18.7)/(6.941) times Avogadro's Number of atoms, or about 1.62 X 1024, to the justified number of significant digits.
1 gram equals how many moles?
The number of moles in 1 gram depends on the specific substance. To calculate the number of moles, you need to know the molar mass of the substance. You can use the formula: moles = mass (g) / molar mass (g/mol) to determine the quantity of moles in 1 gram.
How many moles of ammonium ions does a 22.5 gram sample of ammonium carbonate?
To calculate the number of moles of ammonium ions in a 22.5 gram sample of ammonium carbonate, you need to first determine the molar mass of ammonium carbonate. Then, divide the given mass by the molar mass to find the number of moles. After that, since there are 2 ammonium ions in one molecule of ammonium carbonate, you will need to multiply the result by 2 to determine the number of moles of ammonium ions.
When finding the moles of a gram sample of a diatomic element do you divide by twice the molar mass?
YE you do divide by 2
What is the gram formula of sodium fluoride?
The formula of sodium fluoride is NaF; its gram formula mass is 41.9882.
Which element Mo Se Na or Br contains the most moles of atoms in a 1.0 gram sample?
The element with the most moles of atoms in a 1.0 gram sample would be Mo (Molybdenum) as it has the highest molar mass among the given elements (95.94 g/mol). This means that 1.0 gram of Mo would contain the most moles of atoms compared to Se (Selenium), Na (Sodium), and Br (Bromine).
A one gram sample of aspirin contains 75.2 percent by mass of C9H8O4 How many moles of acetylsalicylic acid are in the sample?
To determine the number of moles of acetylsalicylic acid in the sample, we first need to calculate the molar mass of C9H8O4 (aspirin). Molar mass of C9H8O4 = (912) + (81) + (4*16) = 180.16 g/mol Next, we calculate the mass of acetylsalicylic acid in the sample: Mass of acetylsalicylic acid = 75.2% of 1 gram = 0.752 grams Finally, we find the number of moles using the formula: Number of moles = Mass / Molar mass Number of moles = 0.752 g / 180.16 g/mol ≈ 0.0042 moles Therefore, there are approximately 0.0042 moles of acetylsalicylic acid in the sample.
