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[ 4.0(g) / 16(g/mol) ] * 6.0*1023= 1.5*1023 O-atoms
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The actual mass of an atom of argon is is 6.63x10-24g How many atoms are in a 40.0-g sample of argon?
Divide 40g by the mass of one atom to find the number of argon atoms.
How many moles of calcium atoms are in 45.8 g of Ca?
1mol Ca = 40 gCa 45.8g/40g = 1.145 mol Ca
What mass of oxygen is required to completely react with 20 grams of CH4?
Take the balanced equation CH4+2O2---->CO2+2H2O.So according to it 40g of O2
What is the molar mass of sodium and hydroxide?
Sodium has a molar mass of 23 Hydroxide (Hydrogen & Oxygen) have a molar mass of 17 23+17=40g/mol 40grams per mole
How many grams of solid sodium hydroxide would need to be added to completely neutralize 35.0 mL of 1.45 M HBr?
This is a titration question: we want to have the same number of hydroxide ions as hydroxide ions so that they will form water and the pH will be neutral. In chemistry, we count atoms and molecules in moles, and we can calculate how many moles of HBr we have, because concentration in molarity is the number of moles divided by the volume in liters... M = moles/V. We plug in what we got: 1.45M = moles/0.0350L, and solve for moles: 0.0508 moles. Now we know we need 0.0508 moles of NaOH, whose molecular weight is 40g/mole. MW x moles = grams, so (40g/mole)(0.0508 moles) = 2.03 g of NaOH.
How many oxygen atoms are present in 40.0 grams of oxygen gas?
Ar of O = 16g/mol Mr of O2 = 2(16) = 32g/mol Using the formula : Number of moles = mass / Mr Number of moles = 40g / 32g/mol = 1.25mols One mole of substance contains the same number of particles as the Avogadro constant, which is 6.02 x 10^23 Number of Oxygen molecules = 1.25 x 6.02 x 10^23 = 7.525 x 10^23 Each Oxygen molecules contain two Oxygen atoms Number of Oxygen atoms = 7.525 x 10^23 = 1.505 x 10^24 atoms
The actual mass of an atom of argon is is 6.63x10-24g How many atoms are in a 40.0-g sample of argon?
Divide 40g by the mass of one atom to find the number of argon atoms.
How many moles of calcium are in a sample of 40g?
Since the gram atomic mass of calcium is 40.08 and calcium does not form polyatomic molecules, the number of moles in 40g of calcium is 1.0, to the justified number of significant digits.
What is 85 percent of 40g?
85% of 40g is 34g
How many moles of calcium atoms are in 45.8 g of Ca?
1mol Ca = 40 gCa 45.8g/40g = 1.145 mol Ca
Which gas effuses faster at the same temperature molecular oxygen or atomic argon?
Molecular oxygen will effuse faster because: Molar Mass of O2: 32g Atomic Mass of Ar: 40g
How much is 40 g in weight?
The question doesn't make sense, 40g weighs 40g. Do you mean what does 40g equate to in an other system of measures?
What 25 percent of 40g?
25% of 40g= 25% * 40= 0.25 * 40= 10g
Can a 40g PS3 play ps2 games?
nope, only 60g and 80g. =( and i have a 40g.
What mass of oxygen is required to completely react with 20 grams of CH4?
Take the balanced equation CH4+2O2---->CO2+2H2O.So according to it 40g of O2
The mass of argon is 6.63 x 10-24g How many atoms are there in a 40.0 g sample argon?
just divide the mass of sample by the mass of argon. OR: atomic mass of argon is 40 g/mol, so in a 40g sample of argon, there ought to be 1 mole atoms, or 6.02x10^23 atoms
Is a anker 40g 40kg?
40kg
