12/20/19

length of 12 gauge copper wire
solid 12 gauge copper wire is essentially just a very long cylinder of copper.It is used extensively in house wiring.12 gauge wire has a diameter of .2052 cm.Copper has a density of 8.96... more
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12/19/19

What is the enthalpy of combustion of 0.2 moles of C2H6(g)?
C(s) + O2(g) → CO2(g)  ΔHf = −394 kJH2(g) +1/2O2(g) → H2O(l)  ΔHf = −242 kJ2C(s) + 3H2(g) → C2H6(g)ΔH =−84 kJThe combustion of C2H6 is shown by the following equation:C2H6(g) +7/2 O2(g) → 2CO2(g) +... more
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12/19/19

what is the pH of the solution?
Ammonia (NH3) ionizes according to the following reaction:NH3(aq) + H2O(l) ⇌ NH4+(aq) + OH–(aq)The base dissociation constant for ammonia (NH3) is Kb = 1.8 × 10–5. Ammonia (NH3) also has a chloride... more
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12/19/19

How did the concentration of Cl2 change compared to the first equilibrium? 
2HCl(g) + I2(s) ⇌ 2HI(g) + Cl2(g)When the reaction is at equilibrium, some amount of HI is added. The system reaches a new equilibrium state.how did the concentration of Cl2 change compared to the... more
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12/19/19

What is the rate of disappearance of CH4?
CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)The molar mass of CH4 is 16 g/mol, and in this reaction, 1.6 g of CH4 is consumed in 2 minutes.What is rate of disappearance of CH4, given in mol/min?
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12/19/19

Which factor would only affect the rate of the third reaction?
N2(g) + O2(g) → 2NO(g)O(g) +1/2 O2(g) → CO2(g)Na(s) + HCl(l) → NaCl(aq) +1/2 H2(g)Which factor would only affect the rate of the third reaction?
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12/19/19

Which could lead to a negative free energy value?
Which of the given conditions leads to a negative free energy value (spontaneous reaction)?slightly negative enthalpy and highly negative entropyhighly positive enthalpy and highly negative... more
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12/19/19

What is the ΔS° of this reaction?
NH4Cl(s) → NH3(g) + HCl(g) ΔH°=176 kJ/molAt 25 °C, this reaction has a ΔG° of 91.1 kJ/mol.What is the ΔS° of this reaction?
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12/19/19

How many grams of water can be made from 64 g of oxygen water

From the equation: 2H2 + O2 —-> 2H2O
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12/17/19

How many molecules are in 85.945g of PCl5
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12/17/19

How many grams are in 9.0 lead oxide
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12/17/19

How can I test the quality of a tums (antiacid) tablet through a titration?
Our chemistry professor has asked us to design our own lab experiment and we wanted to do a titration, he suggested that we test the quality of an antiacid tablet. We’ve accepted, but have a small... more
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12/17/19

The ksp for BaF2 is 1.7 x 10^-6 . What is the concentration of Ba+2 in a saturated solution of BaF2?
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12/17/19

calculate the pH of 0.53 M Ba(OH)2 and of 0.500M H2SO4
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12/17/19

the ionization constant for water (kw) is 2.9 x 10^ -14 at 40 degrees C. What is the pOH of water at this temperature?
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12/17/19

What is the equilibrium reaction for stomach acid (can be with food or medicine)?

I am doing an assessment and need to find a correlation between stomach acidity and medicine and then relate this to an equilibrium reaction / constant. If anyone has any ideas would be extremely... more
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12/17/19

Chemistry Honors Help? (stoichiometry)
7) How many moles of nitric oxide, NO, are formed when 1.2 mol of nitrogen dioxide, NO2, reacts with excess water?3NO2 (g) + H2O (l) --> 2HNO3 (aq) + NO (g)82) If 60 grams of NO and 60 grams of... more
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12/16/19

I would like to know if this statement is true or false
The sum of all of the oxidation numbers in a molecule or ion must equal zero
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12/16/19

How many milliliters of 4.00 M NaOH must be added to 100.0 mL of .2000 M H2SO4 solution to completely neutralize the acid
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12/14/19

What is the total energy change for the reaction of molecular hydrogen with molecular oxygen to form water (based on the balanced chemical equation above)?

One proposed source of clean energy is the combustion of hydrogen in the presence of oxygen. This reaction releases a significant amount of energy, and the only product of the reaction is water.... more
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12/14/19

How many moles of carbon are in 37.19 grams of carbon dioxide?
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12/13/19

What mass of carbon is present in 8.02 x 10^23 formula units of Al2(CO3)3?
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12/13/19

I need to balance an equation between two molecules.

I need to write out and fully balance a complete combustion reaction between these two molecules.
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12/12/19

If you had 5.000 grams sample of Li3Po4, how much lithium would you have?
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12/12/19

How do i do Ionic Bonds!
e.e potasium ocsid potasium is k+ocsid is O2-why and how is it K2O then ?shouldnt it be k+O2-?
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