01/25/21

Please help with chem homework on balancing equations!
We need to balance these equations and write them in chemical formula: Aluminum hydroxide + calcium sulfate = Aluminum sulfate + calcium hydroxide Barium nitrate + sodium Sulfate = Aluminum +... more
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01/25/21

What amount of heat (in kJ) is required to convert 10.1 g of an unknown solid (MM = 83.21 g/mol) at -5.00 °C to a liquid at 52.3 °C?
What amount of heat (in kJ) is required to convert 10.1 g of an unknown solid (MM = 83.21 g/mol) at -5.00 °C to a liquid at 52.3 °C? (specific heat capacity of solid = 2.39 J/g･°C; specific heat... more
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01/25/21

What amount of heat, in kJ, is required to vaporize 115.00 g of ethanol ...
What amount of heat, in kJ, is required to vaporize 115.00 g of ethanol (C₂H₅OH)? (∆Hvap = 43.3 kJ/mol)
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01/25/21

Chemistry Molarity

How many moles of potassium iodide are in 250mL of a 0.500 mol/L solution?? , what is the mass of potassium iodide is in the solution?
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01/25/21

Balancing Reactions Part 1
____Al   +              ____O2      →              ____Al2O3Please explain how to solve the problem and answer.
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01/25/21

Chemistry Gas Laws Hw help!!
A gas had a volume of 43.5L and 3.69mol. What do you think the final volume of the gas would be if the number of moles decreased to 1.22mol at constant temperature and pressure? What is the name of... more
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01/25/21

You mix 34 mL of butane (C4H10, density = 0.57 g/cm3) with 48 mL of octane (C8H18, density = 0.70 g/cm3). Calculate the mass percentage (% m/m) of butane in this solution, to two significant figures.
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01/25/21

Does anyone know the net ionic equations for these equations and word problems?
______ 1. Li2SO4(aq) + Ca(NO3)2(aq) ⭢ ______ 2. (NH4)2CO3(aq) + KClO4(aq) ⭢ ______3. AlCl3(aq) + NaOH(aq) ⭢ ______4. ... more
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01/24/21

Integrated Rate Law Calculations: 1st Order
The gas phase decomposition of phosphine at 120 °CPH3(g)  1/4 P4(g) + 3/2 H2(g)is first order in PH3 with a rate constant of  s-1.If the initial concentration of PH3 is .0514 M, the concentration... more
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01/24/21

Given N2H4 + 7H2O2 → 2HNO3 + 8H2O.
4. Given N2H4 + 7H2O2 → 2HNO3 + 8H2O. If the rate of appearance of HNO3 is 0.026 M·min−1 , what is the rate of disappearance of H2O2? What is the rate of change of H2O2?5. For the reaction of... more
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01/24/21

What happens when co2 is heated

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01/24/21

What general relationship appears to exist between boiling point and number of electrons?
What general relationship appears to exist between boiling point and number of electrons?
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01/24/21

Graphical Method: Order and k from Slope and Intercept
In a study of the decomposition of dinitrogen pentoxide in carbon tetrachloride solution at 30 °CN2O52 NO2 + ½ O2the concentration of N2O5 was followed as a function of time.It was found that a... more
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01/24/21

Graphical Method: Order and k from Slope and Intercept
In a study of the gas phase decomposition of hydrogen peroxide at 400 °CH2O2(g)H2O(g) + ½ O2(g)the concentration of H2O2 was followed as a function of time.It was found that a graph... more
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01/24/21

How many liters of NO(g) are produced when 0.85L of 2.00 M HNO3 solution is added to 216 of Ag according to the equation.

Which reactant is the limiting reactant? 3 Ag(s) + 4 HNO3(aq) 3 AgNO3(aq) + NO(g) + 2 H2O(l)
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01/24/21

Rate Law: Write and Apply
The reaction of ICl with hydrogen2 ICl + H2I2 + 2 HClis first order in ICl and second order in H2.Complete the rate law for this reaction in the box below.Use the form k[A]m[B]n... , where '1' is... more
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01/24/21

How many liters of carbon dioxide at STP will be produced by the reaction of 10 g of NaHCO3?
Balanced equation: 1 NaHCO3 + 1 HCL = 1 CO2 + 1 H2O + 1 NaCl
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01/24/21

50.0 mL of 0.100 M Na3PO4 is mixed with 150.0 mL of 0.250 M Pb(NO3)2 to produce a solid precipitate of lead (II) phosphate. What mass of this precipitate will be produced?

3Pb(NO3)2 (aq) + 2Na3PO4 (aq)  Pb3(PO4)2 (s) + 6NaNO3 (aq)
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01/23/21

What mass of AgCl will precipitate when .050 L of a 0.0500 M solution of AgNO3 reacts with 25.0 mL of .0330 M NaCl ? AgNO3(aq) + NaCl (aq)  NaNO3(aq) + AgCl (s)
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01/23/21

Mystery liquid X has a vapor pressure of 238 torr at 33.0 celsius and 918 torr at 83.2 celsius . What is the normal boiling point of mystery liquid X in Kelvin?
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01/22/21

Electrochemistry

For parts of the free-response question that require calculations, clearly show the method used and the steps involved in arriving at your answers. You must show your work to receive credit for... more
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01/22/21

Can anyone help me with this Chemistry Question?
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01/22/21

Solution Chemistry
For the following unbalanced chemical reaction, (a) use the solubility rules to determine the states of the product(s). (b) write a total ionic equation, and (c) write a net ionic equation. Ca(s) +... more
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01/22/21

need chemistry help
If 2.21 moles of propane (C3H8) react with excess oxygen in a complete combustion reaction, how many moles of water are produced?
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01/22/21

Chemistry (solutions)
A solution is made by diluting 200 mL of a 1.50 mol/L standard solution to a volume of 400 mL. What is the concentration of the resulting solution?
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