Urgent Help Needed!!! Chemists Only. - Education

Urgent Help Needed!!! Chemists Only. - Education - Nairaland

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Urgent Help Needed!!! Chemists Only. by mawaki(op): 7:24pm On Apr 02, 2019

Chemists in the house please help me solve this question. How many H atoms are there in 2.0158g of H atoms? It is very urgent please. Thanks.

Re: Urgent Help Needed!!! Chemists Only. by WinningEleven(m): 7:26pm On Apr 02, 2019

2.0158 x 6.02 x 10^26

That's your answer

Re: Urgent Help Needed!!! Chemists Only. by mawaki(op): 7:28pm On Apr 02, 2019

WinningEleven:
2.0158 x 6.02 x 10^26

That's your answer

Thanks but I think the Avogadro's number should be 6.022×10^23.I appreciate.

Re: Urgent Help Needed!!! Chemists Only. by WinningEleven(m): 7:31pm On Apr 02, 2019

mawaki:
Thanks

No qualms

Re: Urgent Help Needed!!! Chemists Only. by WinningEleven(m): 8:07pm On Apr 02, 2019

mawaki:
Thanks but I think the Avogadro's number should be 6.022×10^23.I appreciate.

Yeah. I forgot.

Re: Urgent Help Needed!!! Chemists Only. by Xlyad(m): 2:12am On Apr 03, 2019

Amount=Mass ÷molar mass=2.0158÷1.01=2.0158
No of atoms=amount × Avogadro constant=2.0158×6.02×10^23=1.2×10^24 atoms

Re: Urgent Help Needed!!! Chemists Only. by mawaki(op): 11:26am On Apr 03, 2019*

Xlyad:
Amount=Mass ÷molar mass=2.0158÷1.01=2.0158
No of atoms=amount × Avogadro constant=2.0158×6.02×10^23=1.2×10^24 atoms

Thankyou.Let's say we have 3.8 moles of ribose, C5 H10 O5. What is the mass in grams of the oxygen atom in part? And also what is the Avogadro's number of 1000g sugar molecule? WinningEleven u can also come in.

Re: Urgent Help Needed!!! Chemists Only. by WinningEleven(m): 8:16pm On Apr 03, 2019

mawaki:
Thankyou.Let's say we have 3.8 moles of ribose, C5 H10 O5. What is the mass in grams of the oxygen atom in part? And also what is the Avogadro's number of 1000g sugar molecule? WinningEleven u can also come in.

Mass in grams of oxygen in part is 303.81 grams in 3.8 moles.

Avogadro's number is 4.013 x 10^24

Re: Urgent Help Needed!!! Chemists Only. by mawaki(op): 10:09pm On Apr 03, 2019

WinningEleven:
Mass in grams of oxygen in part is 303.81 grams in 3.8 moles.
Avogadro's number is 4.013 x 10^24

thankyou very much

Re: Urgent Help Needed!!! Chemists Only. by WinningEleven(m): 10:13pm On Apr 03, 2019

mawaki:
thankyou very much

Yeah

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