08/27/19

How many kilojoules of heat are required to raise the temperature of 48.7 grams of ethanol (C2H5OH, 46.1 g/mol) from 0 °C to °25 C and then vaporize it completely?
How many kilojoules of heat are required to raise the temperature of 48.7 grams of ethanol (C2H5OH, 46.1 g/mol) from 0 °C to °25 C and then vaporize it completely? The heat capacity of C2H5OH... more
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08/27/19

A jogger runs 119 yd in 10.00 seconds. What would be his time for a 433 m run at the same rate?
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08/26/19

Calculate the Gibbs free energy and equilibrium constant
Calculate the Gibbs free energy and equilibrium constantThe given reaction is: Ca/Ca+2//Cr+2/CrShould I reverse the reaction since the electromotive force would be negative or should I just... more
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08/26/19

How many kilojoules of heat are required to raise the temperature of 48.7 grams of ethanol (C2H5OH, 46.1 g/mol) from 0 °C to °25 C and then vaporize it completely?

How many kilojoules of heat are required to raise the temperature of 48.7 grams of ethanol (C2H5OH, 46.1 g/mol) from 0 °C to °25 C and then vaporize it completely? The heat capacity of C2H5OH... more
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08/24/19

Can upload documents in the Lesson Plan for my student to review before our lesson?
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08/24/19

chemistry dimensional analysis

The density of platinum is 21.45 g/mL. How many cubic meters does a 95 kg block of platinum occupy?
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08/24/19

chemistry dimensional analysis

Concentrated sulfuric acid has a density of 1.86 g/cm3. What is the mass of 1.0 L of sulfuric acid?
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08/24/19

Zn+2HCL ---> ZnCl2+H2 (g) . How much ZnCl2 can you make from 5 g of Zn?
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08/23/19

Does manganese chloride and cadmium acetate precipitate when mixed

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08/23/19

Reaction of Copper with Acids?
Does copper react with any acid?
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08/22/19

substances' physical state
in a chemical equation if a compound state is not given how am i supposed to determine it?i know the solubility rules but what about solid, liquid, and gas states?
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08/18/19

Calculating Density
In determining the density of a rectangular metal bar, a chemist made the following measurements: length, 9.4 cm, width, 3.7 cm, height, 2.4 cm, mass, 45.9 g. Determine the density to the correct... more
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08/17/19

Item floats, but density isn't less than water
The mass of my film canister filled with sand is 39.35g. The volume is 25.74 cm cubed. What would the density be? And why did it float?
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08/16/19

how much pressure on a person at the bottom of a 12 ft pool
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08/16/19

Brine percentages in cups
100%water 6%salt need help for how much cups this is asap?
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08/16/19

could negative charged ions neutralise radicals and make them non reactive
radical is not stable ,very reactive and needs to have electron or lose electron, can ions by giving an electron to radical or take out its electron to make it not reactive?
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08/16/19

Which substance will most affect the freezing point of water if 1 mole of the substance is added to 1 kilogram of water? A.) LiF B.) Ca(NO3)2 C.) Mg3N2 D.) C6H12O6
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08/16/19

What would be the freezing point for a 5.7 molal aqueous sucrose (Cr12H22O11) solution?
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08/16/19

What is the net ionic equation for potassium sulfate is reacted with calcium bromide?
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08/16/19

Given the following reaction, Cr(OH)3 + NaOH = NaCrO2 + 2H2O , how many grams of NaCrO2 can be produced from 83.3 g of Cr(OH)3?
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08/15/19

how many cubic angstroms occupy exactly one millimeter

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08/14/19

Write the balanced equation for the positron emission from the Technetium-95 radioisotope.
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08/14/19

NaOH solution are needed to prepare 0.715 L solution of NaOH with a concentration of 0.550 M?

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08/13/19

In the following redox reaction, which species is being reduced and which is being oxidized?
2 C2H6 (g) + 7 O2 (g) --> 4 CO2 (g) + 6 H2O (g)I got as far as identifying O2 as the species being reduced (oxidation state decreases) but then I got confused with how C2H6 is being oxidized... more
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08/13/19

Chemistry abt atom and molecules and mole concept

A calcium is 3.33 times the mass of a carbon atom. What is the atomic mass of calcium ? A. 33B.40C.38D.12 A 2.20 m solution contains 265 g of solvent. What is the molality of the solution after... more
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