We assume you are converting between grams Hydrogen and mole. 20g will be H2 and the rest i.e. 11. c (no. mole = 10 / 36.5 = 0.27 moles = 1.626×10^23 molecules of HCl. Which of the following gases contain the same number of molecules as that of 1 6 g of oxygen? 3 molecules of hydrogen Molecules weight of hydrogen (H2) =2g/mole 6.023*10^23 molecules in 1 mole so the weight per molecules is 2g/6.023*10^23 =3.32*10^24 g/mole 3 molecules=3*3.32*10^-24 =9.96*10^-24 Maximum number of molecules are found in 1 gram hydrogen. The same can be said of one mole of any other substance where two atoms combine to make a simple molecule. View solution. Upvote (89) Was this answer helpful? Answer verified by Toppr. answr. of moles of water = 100/18. of mole = given weight ÷ molecular weight So, moles of water = 9÷ 18 = 0.5 mol 1 mol contains 6.022 x 10^23 0.5 … Get Instant Solutions, 24x7. Mass of hydrogen gas liberated/lost = 2g. Now we know the amount of molecules of HCl we have, and, since the reaction is 1:1, we need the exact same number of molecules of NaOH to neutralise it. You can view more details on each measurement unit: molecular weight of Hydrogen or mol The molecular formula for Hydrogen is H. The SI base unit for amount of substance is the mole. Molecular weight of water = 18g Given weight = 9g No. In Chemistry 14 Answers Available Asked by FamDamSam on 11th July, 2014 So, there are 24 atoms of hydrogen in one dozen of hydrogen molecule. The answer is 1.00794. 12 molecules (one dozen) of hydrogen molecules = 12 x 2 = 24 atoms of hydrogen. how many hydrogen molecules are there in 8.2g of hydrogen gas hello pawan in8.2 g there will be approxmiatly 4 molecules and 8 atoms of hydrogen thank you have Learn to Create a Robotic Device Using Arduino in the Free Webinar. Now, one mole of hydrogen atom contain 6.022 X 10 23 atoms of hydrogen, that is . Recall that two hydrogen atoms bind to make a hydrogen molecule. of moles of Ca = 40/40 = 1; no. How many grams Hydrogen in 1 mol? We can work out the number of molecules by timesing the moles by Avogadro's constant above. How many atoms are contained in 2g of hydrogen gas (H=1, Avogadro's constant= 6.02x10^23 molecules)? Hey I did this myself but can't get it right. What is the ratio of the average kinetic energy of the molecules of 1 mole of hydrogen gas at 300K to 1 mole of oxygen gas at a temperature of 300K, assuming they both behave as ideal gases? However, one mole of hydrogen atoms has a mass of 1 gram while one MOLE of hydrogen molecules has a mass of 2 grams. No Signup required. How many atoms are contained in 2g of hydrogen gas (H=1, Avogadro's constant= 6.02x10^23 molecules)? a) what i did was find the molar mass of H2 in 27g h2O, 2g/27g= .074mol H2 b) i then converted .074mol to # of atoms by multiplying this by Avogadros #, .074 x 6.02e23= 4.54atoms H2 in 27g sample of H2O. So Ca is the limiting reactant and H 2 O was present in excess. Assume you have a 100g mixture of O2 and H2.20% i.e. The molar mass of hydrogen molecules is 2g/mol and the molar mass of oxygen molecules is 32g/mol. 6.022 X 10 23 atoms of hydrogen = 1 mole of hydrogen atom. H₂O is made up of two moles of hydrogen atoms =1g/mol =1g(2)because there are two moles Mass of 1 mole of Oxygen atom= 16g/mol Mass of one mole of water H₂O= 2g/mol +16g/mol =18g/mol (ans) Since , two mole = 2(18) = 36g/mol *However according to my homework the write answer is supposed to be 1.81 x 10e24