Chemistry

# What is the mass of 9.30 moles of SiH4?

101112 ###### 2014-06-13 22:45:07

The molar mass of SiH4 is approximately 32.117 grams per mole. So, 9.30 moles of SiH4 has a mass of 298.69 grams.

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## Related Questions The molar mass of SiH4 is approximately 32.117 grams per mole. So, 9.30 moles of SiH4 has a mass of 298.69 grams. 4.26mol x ( 6.022 x 1023 molecules / 1mol ) = 2.565 x 1024 molecules SiH4. since it's mass is larger then CH4, London constraints are stronger. first you set up your ratio; 9.3moles 1mole = 32g 9.3 is the number of moles you're trying to find 32 comes from adding the mass numbers of both elements; Si=28g H=1g, but there's four, so you multiply it by 4, hence the 32 now you crossmultiply; so multiply 9.3 by 32 you get 297.6, then divide by 1 so 9.3 moles SiH4 is 297.6g. follow the same pattern every time and you'll be fine; hope this helps To convert mass to moles, you use the equation n= m/M n is moles, m is mass, M= Molar mass, which is the mass of the atoms in the formula or substance. This formula is: moles = mass of the compound/molar mass of the componnd to convert mass into moles you divide by the molar mass. You cannot convert molar mass directly to moles. 0.615 moles Because the 13 is Carbon's atomic mass so 13.0g/moles Moles=Mass/atomic mass Moles=8.00/13.0= 0.615 moles    By dividing the total mass of the number of moles that you are considering by number of moles; the result is the molar mass.  Since molar mass of hydrogen is 1g , the no. of moles = mass of hydrogen given. or No. of moles= Given mass of substance/Molar mass of substance moles=mass/Molar Mass 6.50=mass/98 mass=637g 6.5 moles of H2SO4 weighs 637g. Atomic mass of Sulphur is 32 1 mole = Atomic mass of sulphur No. of moles = Given mass/ Atomic mass No.of moles= 5/32 0.15 moles No of moles= given mass/molecular mass = 600/30= 20 moles Moles = mass/molar mass = 1/197 = 0.005 moles  no. of moles = mass in g/mass of one mole no. of moles = 28.52/174.3 no. of moles = 0.16363 mol (rounded) the number of moles is mass in grams divided by relative mass example how many moles are there in 42g of carbon? answer 42 / 12 = 3.5 moles mass in grams divided relative mass = number of moles what is the mass of of four moles of hydrogen (H2) gas number of moles = mass/molecular mass. = 24/12 = ~2 moles molar mass =207.2 g / mol no. moles = mass/ molar mass moles = 1 1(207.2) = mass mass of 1 mole lead is 207.2g molar mass =207.2 g / mol no. moles = mass/ molar mass moles = 1 1(207.2) = mass mass of 1 mole lead is 207.2g ###### ChemistryUnits of MeasureElements and CompoundsAcids and BasesHydrocarbonsScience Copyright © 2020 Multiply Media, LLC. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply.