حل اسئلة للكيمياء ؟

[Modi_L]

مين يعرف حل الاسئله ذي

5. The volume of a sample of nitrogen is 10.3 liters at 35°C and 0.970 atm.
What volume will it occupy at STP?

10.856 L
8.856 L
4.856 L
9.856 L

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8. What is the mass of nitrogen gas in 1490.0 mL flask at STP?

0.864 g
1.864 g
5.864 g
4.864 g

هذا حليته طلع الجواب 0.932 !!

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9. What is the density of oxygen gas in 1L flask at 96 cmHg and 270 K?

3.826 g L-1
1.826 g L-1
4.826 g L-1
0.826 g L-1

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12. A mixture of three gases has a total pressure of 1920.0 mmHg at a certain temperature.
The mixture is analyzed and is found to contain 55 g CO2, 84 g CO, and 60 g Ar.
What is the partial pressure of CO ?

4.152 x10^3 mmHg
5.152 x10^3 mmHg
3.152 x10^3 mmHg
1.152 x10^3 mmHg

طلع لي الناتج 1001.74

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13. A mixture of 4 mol N2 gas and 6 mol O2 are in 5 L flask at 290 K, what is the total pressure?

45.56 atm
48.56 atm
50.56 atm
47.56 atm

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14. Calculate the volume of PH3 at 20°C and 753.0 mmHg that can be prepared by additing a water to 1.48 g of Ca3P2.
Ca3P2(s)+6H2O(l)=3Ca(OH)2(s))+2PH3(g)

398.39 ml
391.39 ml
394.39 ml
395.39 ml

طلع لي الناتج 387.907

[عبدالرحمن س م]

السؤال الأول

حليته بطريقه سريعه

[عبدالرحمن س م]

ال SPT دايم يكون فيها ال P = 1 atm و T = 273 K

بكذا تكون المعطيات

V1= 10.3
P1 = 0.970
T1 = 35+273 =308 ( ال T لازم تكون بوحدة Kوتحويلها من C الى K بزيادة 273 )
T2 = 273 ( من ال SPT )
P2 = 1 atm ( من ال SPT )
V2 = مجهول

تعويض مباشر


السؤال الثاني نفس الشيئ طلع لي 0.932

[Modi_L]

المشاركة الأصلية كتبت بواسطة عبدالرحمن س م ال SPT دايم يكون فيها ال P = 1 atm و T = 273 K بكذا تكون المعطيات V1= 10.3 P1 = 0.970 T1 = 35+273 =308 ( ال T لازم تكون بوحدة Kوتحويلها من C الى K بزيادة 273 ) T2 = 273 ( من ال SPT ) P2 = 1 atm ( من ال SPT ) V2 = مجهول تعويض مباشر

مشكووور

[Modi_L]

What is the maximum number of electrons in an atom that can have the following quantum numbers: n = 5, mL = +3.

4
8
2
6

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What is the maximum number of electrons in an atom that can have the following quantum numbers: n = 2, ms = -1/2.

4
9
1
16

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What is the maximum number of electrons in an atom that can have the following quantum numbers: n = 5, l = 2?

14
10
6
2