04/18/21

is it e or ?????????
The equation 2Al(s) + 2Br2(l) → 2AlBr3(s) is a(n) ______________ reaction. a. combustion b. synthesis only c. oxidation-reduction only d. decomposition e. oxidation-reduction and synthesis
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04/18/21

is it A ?????????
An aqueous solution of ammonium carbonate is allowed to react with an aqueous solution of barium chloride. The complete ionic equation contains which of the following species (when balanced in... more
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04/18/21

Answer???????????????
Which of the following is a strong acid? a. phosphoric acid b. hydrofluoric acid c. lactic acid d. nitric acid e. acetic acid
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04/18/21

Question in the description
How many electrons are transferred in the following oxidation-reduction reaction?Zn(s) + 2AgNO3(aq) → Zn(NO3)2(aq) + 2Ag(s)a.4b.3c.5d.2e.1
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04/18/21

PLease Answer... Thank you
Use the following choices to classify each reaction given below (More than one choice may apply).a. Oxidation–reductionb. Acid–basec. PrecipitationCa(s) + H2(g) → CaH2(s)
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04/18/21

PLease Answer... Thank you
Use the following choices to classify each reaction given below (More than one choice may apply).a. Oxidation-reductionb. Combustionc. Synthesisd. DecompositionP4(s) + 5O2(g) → P4O10(s)
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04/17/21

What are the molality and mole fraction of solute in a 34.6 percent by mass aqueous solution of formic acid (HCOOH)?
What are the molality and mole fraction of solute in a 34.6 percent by mass aqueous solution of formic acid (HCOOH)?
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04/17/21

What formula do I use to calculate E°cell given [Ni2+]= 0.80M and [Co2+]= 0.20M?
Ni2+ +Co -> Ni + Co 2+
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04/17/21

What is the freezing point of a solution of ethylene glycol (antifreeze), a nonelectrolyte, that contains 290. g of C2H6O2 dissolved in 120. g of water?
freezing point 0.00°C boiling point 100.00°C Kf 1.86°C/m Kb 0.512°C/m Use molar masses with at least as many significant figures as the data given
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04/17/21

Determine the boiling point of 8.6 grams of magnesium chloride in a water solution using 541 g of water .

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04/16/21

The air pressure for a certain tire is 817.8 mmHg. What is this pressure in Kilopascals (kPa)?
a) 109 kPab) 175.5 kPac) 1.002 atmd) 1.08 atm
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04/16/21

Chemistry .
If the total pressure of air is 133 kPa, what is the P O2 if it makes up 22% of the total pressure?
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04/16/21

Sulfur dioxide is produced in enormous amounts for sulfuric acid production. It melts at −73.0°C and boils at −10.0°C....
Its DeltaH fus is 8.619 kJ/mol, and its DeltaH vap is 25.73 kJ/mol. The specific heat capacities of the liquid and gas are 0.995 J/g.K and 0.622 J/g.K, respectively. How much heat is required to... more
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04/16/21

A liquid has a ΔH degree vap of 30.7 kJ/mol and a boiling point of 125°C at 1 atm. What is its vapor pressure at 102°C?
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04/16/21

What is the percent composition of an alloy produced by melting 20 grams of tin in 80 grams of zinc?
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04/16/21

What is the molarity of a solution prepared by dissolving 284 grams of sodium sulfate in 2500 mL of water?
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04/16/21

What is the mass/volume percent of 36 grams of HCl in 1 liter of water?
Need help with this problem/set up
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04/16/21

Question about bases
Which pH value indicates the solution that is a base that conducts electricity the poorest?a) 3 b) 5 c) 9 d) 12Explain your answer:
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04/16/21

pH Chemistry Question

Which of the following solutions can have a pH of 5?a) a 10-5 M solution of HCl b) a 10-5 M solution of NaOHc) a 10-5 M solution of NaCl d) a 10-5 M solution of CH4
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04/16/21

Unit 8 Checkpoint Question 1 - NEW CED Compatible
Vitamin C, Ascorbic acid H2C6H6O6, is a weak acid with a Ka of 7.9 x 10-5A) Write an equation showing the dissociation of one H+ from the acid.B) Identify the acid and conjugate base.C) Build a... more
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04/16/21

During an experiment, 3.0g of sodium acetate, NaC2H3O2, were added to 20.0 ml water at 20.0ºC.  The temperature dropped to 18.0º
During an experiment, 3.0g of sodium acetate, NaC2H3O2, were added to 20.0 ml water at 20.0ºC.  The temperature dropped to 18.0ºC.a) Is the reaction endothermic or exothermic? Explain.b) Find the... more
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04/16/21

Solutions of CuCO3
What is minimum volume of distilled water that is needed to completely dissolve a 3.0g sample of CuCO3 at 25 degrees C? (Ksp for CuCO3 is 2.5x10^-10 at 25 degrees C)
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04/15/21

chemistry question
If a buffer solution is 0.210 in a weak base (𝐾b=3.8×10−5) and 0.500 M  in its conjugate acid, what is the pH?
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04/15/21

Chemistry question
If a buffer solution is 0.210 M in a weak acid (𝐾a=3.4×10−5) and 0.420 M in its conjugate base, what is the pH?
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04/15/21

balance the reaction of copper (ii) sulfate with cobalt to form a Co+3 compound
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