The molecular mass of selenium is 78.96g/mol. You need to convert micrograms to grams. i.e. 56/1,000,000 is 0.000056 grams. 0.000056/78.96 is 0.00000071 moles.
moles = weight in grams / molecular weight = 56 / 28 = 2 moles
Mass in grams = no of moles x molecular mass. So, mass in grams = 5.2x 56 = 291.2g
To determine the mass of oxygen gas containing the same number of moles as 56 grams of sulfur, calculate the molar mass of sulfur (32 g/mol) and use it to find the number of moles in 56 grams. Then, since the molar ratio of sulfur to oxygen in a compound is 1:1, this same number of moles of oxygen gas would weigh 32 grams.
4 g of Helium = 1 mole.So, 56 g of helium = 14 moles
56 people signed the Declaration of Independence.
moles = weight in grams / molecular weight = 56 / 28 = 2 moles
56 moles × (6.02 × 1023) = 3.37 × 1024 atoms
m = ( 56 g ) ( 10^6 micg / 1 g ) = 5.6 x 10^7 micg <------------------------------
To find the number of moles, you need to divide the given mass (in grams) by the molar mass of CCl4, which is 153.82 g/mol. Therefore, 56 g / 153.82 g/mol = 0.364 moles of CCl4.
Divide the Molar Mass of C and Cl4 by 56 to get your awnswer!
To prepare a 2 M solution of KOH, you would need to calculate the moles of KOH required first. Then use the formula mass of KOH (56 g/mol) to convert moles to grams. First, calculate the moles needed: 2 moles/L * 0.25 L = 0.5 moles. Then, convert moles to grams: 0.5 moles * 56 g/mole = 28 grams of KOH needed.
Mass in grams = no of moles x molecular mass. So, mass in grams = 5.2x 56 = 291.2g
Milli means one thousandth. So there are 1000 millimoles in a mole. Therefore 56/1000 gives you 0.056 moles.
To determine the number of moles of aluminum present, we need to first determine the molar mass of aluminum, which is approximately 26.98 g/mol. We can then use the formula: moles = mass / molar mass. Plugging in the values, we get moles = 15 g / 26.98 g/mol ≈ 0.56 moles of aluminum.
To determine the mass of oxygen gas containing the same number of moles as 56 grams of sulfur, calculate the molar mass of sulfur (32 g/mol) and use it to find the number of moles in 56 grams. Then, since the molar ratio of sulfur to oxygen in a compound is 1:1, this same number of moles of oxygen gas would weigh 32 grams.
Simply divide by the number that signifies moles of any thing; Avogadro's number. 3.4 X 10^23/6.022 X 10^23 = 0.56 moles of H2SO4
To determine the number of moles in 34 grams of KOH, we first need to calculate its molar mass. The molar mass of KOH is approximately 56.11 g/mol (potassium: 39.10 g/mol, oxygen: 16.00 g/mol, hydrogen: 1.01 g/mol). Divide the given mass by the molar mass to find the number of moles: 34 g / 56.11 g/mol ≈ 0.61 moles of KOH.