12/02/20

Make Lewis Dot Structures for common ions:
a. H1+ b. Li1+c. Cl1- d. O2-
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12/01/20

What kind of bond would form between copper and zinc? How do you know?
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12/01/20

Chemistry homework help
What volume of 0.0100 M barium hydroxide, Ba(OH)2, solution is needed to completely neutralize 10.0 mL of 0.0200 M hydrochloric acid?
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12/01/20

Chemisty Homework help
What mass of solid anhydrous iron(II) chloride is needed to make 50.0 mL of a 0.100 M solution?
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12/01/20

When formulation the rate law for the reaction 2A + 3B + C -> 2D +E,

in general we cannot use the stoichiometry of the reaction to formulate the rate law and the reaction order. Explain why the reaction order for the above reaction is not simply 2+3+1=6.
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12/01/20

When inverting a graduated cylinder, why do we have to correct the volume by subtracting 0.2 mL?
My TA said that it's because there is water in the lip of the cylinder, so we have to account for that. This doesn't make any sense to me, so I'm looking for an alternative explanation. Thanks!
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12/01/20

calculation of E
A 100.0 mL solution of 0.0200 M Fe3+ in 1 M HClO4 is titrated with 0.100 M Cu+, resulting in the formation of Fe2+ and Cu2+. A Pt indicator electrode and a saturated Ag∣∣AgCl electrode are used to... more
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12/01/20

How many grams of sodium sulfate, g Na2SO4,
How many grams of sodium sulfate, g Na2SO4, must be provided to prepare a 2.35% (m/m) sodium sulfate solution using 135 grams of water?Enter your answer with the proper number of significant... more
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12/01/20

Considering change of state descriptions, select the name of the change of state for an endothermic change a. condensation b. deposition c. freezing d. Sublimation
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12/01/20

Match each solution to the correct osmolarity.

  Match each solution to the correct osmolarity.          -     A.     B.     C.     D.      1.0 M glucose         -     A.     B.     C.     D.      1.0 M... more
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12/01/20

A balloon contains 0.62 moles of helium at 481 mm Hg and 13 °C. The volume of the ballon is ____ liters.
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12/01/20

How many milliliters of a 6.00 M HNO3 solution are needed to prepare 2.75 L of a 1.75 M solution?
How many milliliters of a 6.00 M HNO3 solution are needed to prepare 2.75 L of a 1.75 M solution?
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12/01/20

A sample of nitrogen gas that occupies 4.5 liters at 38 °C is heated to 59 °C. The new volume of the gas is ___ liters.

A sample of nitrogen gas that occupies 4.5 liters at 38 °C is heated to 59 °C. The new volume of the gas is ___ liters. 
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12/01/20

What is the molarity of a solution prepared by adding 5.08 grams of calcium chlorite, to enough water to prepare 125 mL of solution?
What is the molarity of a solution prepared by adding 5.08 grams of calcium chlorite, to enough water to prepare 125 mL of solution?
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12/01/20

Writing half reactions for redox reactions
For this particular redox reaction, KI + H2 ➡️ K + HI we can balance it by writing out the half reactions:KI ➡️ K + HIH2 ➡️ H20? My question is for the H2 half reaction above, would we balance it... more
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12/01/20

intro chemistry

The maximum contaminant level of copper (Cu) in drinking water as set by the the Environmental Protection Agency (EPA) is 0.0013 g⋅L−1. Express this concentration in parts per million (ppm). Assume... more
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12/01/20

Chemistry hw help
Dioxygen difluoride (FOOF) is such a strong oxidizing agent that it makes water ice burn (explode, actually), probably according to the balanced equation2 FOOF + 2 H2O  --------> 4 HF + 3 O2How... more
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12/01/20

Gas Laws question: same pressure for 5 gases, determine largest number of moles, Please help!
You have a container filled with a mixture of five gases: He, H2, O2, CO2, and N2. The pressure of each gas is identical, resulting in the overall pressure of 100.0... more
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11/30/20

In an experiment, a student collects 107 mL of H2 over water at a pressure of 104.8 kPa and a temperature of 30°C. How many grams of H2 are present?
A) 0.024 gB) 4.00 gC) 0.04 gD) 0 049 gAnd why
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11/30/20

Writing Ksp expression

While doing Ksp problems, I found that in some problems you have write out the expression with a coefficient multiplied by x while others you only have to put the exponent outside the... more
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11/29/20

Describe the law of conservation of mass and the process of balancing a single replacement reaction
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11/29/20

explain the identification process for a single replacement reaction and the factors that need to be considered

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11/29/20

Chem homework help
A sample of impure CaCO3(s) is dissolved in 50mL of 0.150M HCl(aq)The equation for the reaction isCaCO3 (s) +2HCl (aq)=CaCl2 (aq) + H2O (I) +CO2 (g)The excess HCl(aq) is titrated by 7.30 mL... more
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11/29/20

Chem Homework help
A solution of NaCl(aq)  is added slowly to a solution of lead nitrate,Pb(NO3)2(aq) , until no further precipitation occurs. The precipitate is collected by filtration, dried, and weighed. A total... more
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11/29/20

Complex ion formation

Calculate the concentration of free cadmium ion, [Cd2+], in a solution that contains 0.20 M Cd(NO3)2 in 2.0 M NaCN. Cadmium ion forms the complex ion, Cd(CN)42- for which Kf is 6.0 x 10^18.For the... more
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