اتمنى المساعدة في حل اسئلة الكيمياء

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السلام عليكم ورحمة الله وبركاتة

حابة استفسر عن طريقة الحل بالتفصيل لتست بانك دكتورة ليلى في مادة الكيمياء

(The fertilizer ammonium sulfate(NH4)2SO4 is prepared by the reaction between ammonia(NH3
?and sulfuric acid
2NH3 + H2SO4 _____ (NH4)2SO4
5^ How many kilograms of NH3 are needed to produce 1.00 ´ 10
of(NH4)2SO4

a) 1.70 * 10^4 kg
b) 3.22 * 10^3Kg
c) 2.58 * 10^4 kg
d) 7.42 * 10^4kg

الأجابة الصحية C

Nitrous oxide (N2O)is also called “laughing gas’’ It can be prepared by the thermal decomposition of ammoniUm nitret(NH4NO3) The
other product is The balanced equation for this reaction is

NH4NO3 ____ N2O + H2O

How many grams oF N2O are formed if 0.46 mole of NH4NO3 is used in the reaction

a) 2.0 g
b) 3.7 *10^1g
c) 2.0 *10^1g
b)4.6 *10^-1g

الأجابة الصحيحة C

Hydrochloric acid can be prepared by the following reaction
2NaCl + H2SO4 ____ 2HCl + NA2SO4
How many grams of HCl can be prepared from 2.00 mol H2SO4 and 150 g of NACL

a) 7.30 g
b) 93.5 g
c) 146 g
d) 150 g

الأجابة الصحيحة b

How many grams of sulfur (S) are needed to react completely with 246 g of mercury (Hg) to form HgS?
a) 39.3 g
b) 24.6 g
c) 9.66 × 10^3 g
d) 201 g

الأجاة الصحيحة a

Tin(II) fluoride (SNF2)is often added to toothpaste as an ingredient to prevent tooth decay. What is the mass of F in
grams in 24.6 g of the compound?
a) 18.6 g
b) 24.3 g
c) 5.97 g
d) 75.7 g

الأجابة الصحيحة c

شابتر 9
When a transition metal atom becomes a +1 ion, the electron lost usually comes from what type of orbital?
a) p
b) f
c) d
d) s
الأجابة الصحيحة D

A molecule of CS2 contains
a) two single bonds.
b) two double bonds.
c) one single bond and one double bond.
d) one single bond and one triple bond.

How many resonanc structures can be drawn for N^-3
a) 1
b) 2
c) 3
d) 4
الأجابة الصحيحة C
-Considerin formal charg what is the preferred Lewis structure of NCO
ماني عارفة اكتبها بس مبدئيا هو في 3 اجابات صح والاختيار خطا رقم السؤال ( 11) والمكتوب الاجابة الصحيحة 3 لكن انا الي اعرفو مفروض تكون 1

Which of these covalent bonds is the most polar (i.e., highest percent ionic character)?
1) AL ______ I
2) Si_____ I
3) AL ____ CL
4) Si ____ CL

الأجابة الصحيحة C

There are __________ paired and __________ unpaired electrons in the Lewis symbol for a phosphorus atom.
a) 4, 2
b) 2, 4
c) 4, 3
d) 2, 3
الأجابة الصحيحة D على اي اساس مو مفروض يكون 3bound ,2 non , 1pair

What is the maximum number of double bonds that a carbon atom can form?
a) 4
b) 1
c) 2
d) 0
الاجابة c كيف اعرف العناصر الأخرى مثلا O , S وكدا

شابتر 15

The pOH of a solution of NaOH is 11.30. What is the [H+] for this solution?
a) 2.0 x 10-3
b) 2.5 x 10-3
c) 5.0 x 10-12
d) 4.0 x 10-12

شابتر 14
Calculate Kp for the reaction 2NOCl(g) ↔ 2NO(g) + Cl2(g) at 400°C if Kc at 400°C for this reaction is 2.1 × 10-2.
a) 2.1 × 10-2
b) 1.7 × 10-3
c) 0.70
d) 1.2
الأجابة D

For the following reaction at equilibrium, which choice gives a change that will shift the position of equilibrium to favor
formation of more products?
2NOBr(g) ↔ 2NO(g) + Br2(g), ΔHºrxn = 30 kJ/mol
a) Increase the total pressure by decreasing the volume.
b) Add more NO.
c) Remove Br2.
d) Lower the temperature.
الأجابة C

For the following reaction at equilibrium in a reaction vessel, which one of these changes would cause the Br2
concentration to decrease?
2NOBr(g) ↔ 2NO(g) + Br2(g), ΔHºrxn= 30 kJ/mol
a) Increase the temperature.
b) Remove some NO.
c) Add more NOBr.
d) Compress the gas mixture into a smaller volume

الأجابة D

Consider the equilibrium system; C(s) + CO2(g) 􀖖 2CO(g) .
If more C(s) is added, the equilibrium will ____; if CO is removed the equilibrium will ____.
a) shift to the left; shift to the left
b) shift to the right; shift to the right
c) shift to the right; shift to the left
d) be unchanged; shift to the left
الاجابة C

What is KP in terms of Kc for the following reaction ?2 NO(g) + O2(g) ↔2 NO2(g)
a) Kp = KcRT
b) Kp = Kc/RT
c) Kp = KcR/T
d) Kp = Kc/(RT)2

الأجابة B
واذا عندكم نموذج محلول لتست بانك 14 بالتفصيل ياليت تدوني هو
وشكرا واسفة على الأطالة

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اول اسئلة من شابتر 3

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