12/09/18

ZNSO4 and water net ionic equation
The compound zinc sulfate, ZnSO4 is soluble in water. Write the net ionic equation for the dissociation reaction that occurs when solid zinc sulfate dissolves in water: write the net ionic equation
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12/09/18

1. Write a balanced chemical equation, including physical state, for the decomposition of solid mercury (II) oxide (HgO) into liquid mercury and gaseous dioxygen.

Suppose 28.0 mL of dioxygen gas are produced by this reaction, at a temperature of 80.0*C and pressure of exactly 1 atm. Calculate the mass of mercury(II) oxide that must have reacted. Round your... more
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12/09/18

How do the particles in each state of matter move?

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12/09/18

James took 22 seconds to run the 200 yard dash. How many feet per minute is that? Show work.
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12/09/18

How does the space between the particles in each state of matter differ?
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12/09/18

HELP ! ! ! ! Chemistry home work ! ! ! ! ! ! !

If the heat of combustion for a specific compound is -1460kj/mol and it’s molar mass is 85.75g/mol how many grams of this compound must you burn to release 652.70kj of heat
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12/09/18

HELP ! ! ! Chemistry home work . ! ! ! ! ! ! !

A hot lump of 37.4g of aluminum at an initial temperature of 63.3C is placed in 50ml of h2O initially at 25C and allowed to reach thermal equilibrium. What is the final temperature of the aluminum... more
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12/09/18

A 200 g bar of magnesium metal is placed in 2.40 L of 6.00 mol/L hydrochloric acid solution. What is the final mass of the magnesium bar?
A 200 g bar of magnesium metal is placed in 2.40 L of 6.00 mol/L hydrochloric acid solution. What is the final mass of the magnesium bar?
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12/09/18

Why does sodium float on water ?
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12/09/18

What are the white fumes produced when ammonium hydroxide reacts with sulphuric acid ?
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12/08/18

How many grams of KNO3 can be dissolved in 200.0 mL of water at 35 Celsius
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12/08/18

electrochemistry question

Given the following dataCe4+(aq) + e–  → Ce3+(aq)  E° =+1.61VHg2+(aq) + 2 e– →  Hg(l) E° = +0.855Calculate the standard potential in Volts of the galvanic cell that could be built based on the two... more
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12/08/18

electrochemistry question
During an electroplating experiment, Copper is deposited from a CuSO4 solution. The experiment is conducted using a current of 1.62 A for 1.0 hrs. How many grams of Copper have been deposited?
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12/08/18

mixing 9% and 15% acid solution gives 300ml of a 10% acid solution.How much of each acid solution must be used
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12/08/18

How many mL of a 0.131 M aqueous solution of iron(III) fluoride, , must be taken to obtain 5.24 grams of the salt?
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12/07/18

General Chemistry

Assuming equal concentrations, rank these solutions by pH. Highest to lowest:NH3(aq)KOH(aq)Ca(OH)2(aq)HCN(aq)HI(aq)
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12/07/18

A 79.1 g piece of metal at 90.0°C is placed in 127 g of water at 21.0°C contained in a calorimeter. The metal and water come to the same temperature at 25.3°C.

A 79.1 g piece of metal at 90.0°C is placed in 127 g of water at 21.0°C contained in a calorimeter. The metal and water come to the same temperature at 25.3°C. How much heat (in J) did the metal... more
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12/07/18

18.2 grams of Aluminum and 18.2 grams of Beryllium

18.2 grams of Aluminum and 18.2 grams of Beryllium both start at room temperature (25°C). If 49.4 J of heat are added to each separately, what is the temperature difference between the two after... more
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12/07/18

If you add 6.20 kJ of heat to a 48.80 gram piece of metal originally at room temperature (25°C), how hot will this piece of metal become? The specific heat of the metal is 0.390 J/g°C.

If you add 6.20 kJ of heat to a 48.80 gram piece of metal originally at room temperature (25°C), how hot will this piece of metal become? The specific heat of the metal is 0.390 J/g°C.
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12/07/18

What is the specific heat capacity of NaOH(aq)
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12/07/18

What is the mass in grams of 30.11 ✕ 1023 atoms C in grams
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12/06/18

The doctor recommended that Matt increase the number of calories he consumed from 2,000 to 2,800. By what percent did the number of calories increase?
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12/06/18

If 41.4 grams of propane are combusted with 32.2 grams of oxygen, how many grams of water will be formed?
C3H8 (g) + 5 O2 (g) ------> 3 CO2 (g) + 4 H2O (g) Balanced Equation
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12/06/18

An unknown ion was tested an shown to have a (2-) charge and mass percent composition of 48.2% Cr and 51.8% O.
An unknown ion was tested an shown to have a (2-) charge and mass percent composition of 48.2% Cr and 51.8% O. What is the empirical formula and charge for this ion?
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12/06/18

Metalworker problem

A metalworker has a metal alloy that is 20% and another alloy is 60% copper. How many kilograms of each should he use to make 120kg of 52% copper?
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