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For this you need the Atomic Mass of He. Take the number of grams and divide it by the atomic mass. Multiply by one mole for units to cancel.
75.0 grams He / (4.00 grams) = 18.8 moles He
What else can I help you with?
How many grams are in 0.75 moles of SO2?
To convert moles to grams, you need to use the molar mass of the compound. The molar mass of SO2 is approximately 64.07 g/mol. Multiplying the number of moles by the molar mass gives: 0.75 moles x 64.07 g/mol = 48.0525 grams of SO2.
Convert 125 grams of calcium to moles?
For this you need the atomic mass of Ca. Take the number of grams and divide it by the atomic mass. Multiply by one mole for units to cancel.125 grams Ca / (40.1 grams) = 3.12 moles Ca
How many atoms are contained in 6.75 moles of C2H6?
6.02 X 1023 particles per mole X .75 moles = 4.52 X 1023 molecules.
How many hydrogen atoms are present in 75.0 of g H2O?
The gram-molecular mass of H2O is 18.01. Therefore, 75.0 grams contains 75.0/18.01 = 4.16 moles. Each molecule contains two hydrogen atoms. Therefore, the number of hydrogen atoms = 2(4.16)(6.022 X 1023) = 5.01 X 1024 atoms.
How many moles of hydroxide ion are there in a 250 mL sample of 5.00 M solution of sodium hydroxide?
n=c/v n=3M/.25L n=12 mol m=Mxn m=58.443 g/mol x 12 mol m=701.3 g n= mol c=concentration v=volume m=mass M= molar mass Tylerops: I don't agree with this answer. Molarity is defined as Moles/Liters. In other words Molarity is the concentration of a solution. In the above n= Concentration / Liters. That is equal to saying Moles=(Moles/liters)/ Liters. In the above question the concentration is (3 moles/ liter), or 3M. Plus, how can it be possible to have 12 moles in 250ml when you only have 3 moles in each liter of the original solution? Correct ANSWER: 3.00 M, or 3 moles per (L) "liter" calls for having 3 moles per liter of the solution. The question asks how many moles must be in 250ml of a solution that has 3 moles per Liter. You must ask yourself what percent of 1 Liter is 250mls? Since there are a thousand ml in one liter, (1000ml=1L), then 250ml is exactly 25% of a Liter, or .25L. So, 250ml can only hold 25% of the 3.00 Molarity. Meaning that you multiply 3 x .25 and get .75 moles. 58.443g/molNaCl x .75 moles = FINAL ANSWER 43.83225g NaCl, Sig Fig, 43.83gNaCl
How many moles of water ( dihydrogen oxide) are present in 75 grams?
75 grams water is equal to 4,166 moles.
How many grams are in 0.75 moles of SO2?
To convert moles to grams, you need to use the molar mass of the compound. The molar mass of SO2 is approximately 64.07 g/mol. Multiplying the number of moles by the molar mass gives: 0.75 moles x 64.07 g/mol = 48.0525 grams of SO2.
What weighs 75 grams?
Moles are very light and an Eastern Mole weighs only 75 grams. The Eastern Mole is also known as the Scalopus aquaticus.
How many pennyweights in 75 grams?
There are approximately 58.33 pennyweights in 75 grams.
How many grams does 75 oz equal?
75 grams = about 2,126 ounces.
How many moles are in 75.00 grams of hydrogen?
How many hydrogen atoms are in 35.0 grams of hydrogen gas?
How many oz is 75 gram?
75 grams = 2.645 ounces.
How many grams in .75 kilos?
750 grams.
How many ounces is 75 g?
There are 75 oz in 75 oz. If you meant to ask how many cups are in 75 oz., the answer is 9.375 cups.
How many pounds is there in 75 grams?
About 0.165347 pounds.
If 75 grams of sodium reacts with 25 grams of chlorine how many grams of salt will be produced?
75 g sodium chloride contain 29,75 g sodium.
How many grams of sulfuric acid can be made with 75 grams of sulfur?
1 mol of sulfur makes 1 mol of sulfuric acid. The atomic mass of sulfur is 32 g/mol, so 75 g of sulfur is equivalent to 2.34 mol. Since the molar ratio of sulfur to sulfuric acid is 1:1, 2.34 mol of sulfur will make 2.34 mol of sulfuric acid. The molar mass of sulfuric acid is 98 g/mol, so 2.34 mol of sulfuric acid would be equivalent to 229 g.
