10/05/18

very tough chem question
What is the kinetic energy (in kJ mol-1) of a hypothetical gas with molecular weight 16.2 g mol-1 at a temperature of 48.7 °C? Do not try to identify the gas.
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10/05/18

Twelve parts by mass of a carbon...
Twelve parts by mass of a carbon will combine with 16 parts by mass of oxygen to form a gas. How many grams of the gas can be formed using 12 g of carbon and a sufficient amount of oxygen?
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10/05/18

Ratio on NaOH used in this equation
Al2(SO3)3 + 6NaOH -> 3 Na2SO3 + 2 Al(OH)3   why do you use 6 mole of NaOH to only 1 mole of Na2(SO3)3 when determining moles of NaOH used? Why isn't it 6 moles of NaOH to 3 Moles of Na2(SO3)3
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10/05/18

Empirical Formula of Combustion Reaction
A sample of a substance (containing only C, H, and N) is burned in oxygen. 8.395 g of CO2, 1.504 g of H2O and 2.146 g of NO are the sole products of combustion. What is the empirical formula of the... more
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10/05/18

the fastest a human has ever run in 27 miles per hour. how many miles per minute did the human run?
describe how and the distance of the fastest human
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10/04/18

How many pounds of each type of nut should be used in the mixture?
To make a special mix, the owner of a fruit and a nut stand wants to combine cashews that sell for $7 per lb with walnuts that sell for $5.50 per lb to obtain 35 lb of a mixture that sells for... more
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10/03/18

Equilibrium rice table
K = 49 for the following gas phase reaction at 450oC. H2 + I2 ⇔ 2HI If 1.00 mole of HI is put into an evacuated 1.00-liter container and allowed to reach equilibriumenter the equilibrium value for... more
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10/03/18

Write and balance the equation for the complete combustion of ethane C2H6
pha symbola and ene changes are optional 
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10/03/18

There are about 400 cocoa beans in a pound. There are 2.2 pounds in a kilogram. About how many grams does a cocoa bean weigh?
Hi! My name is Sean, I don't understand this problem and I'm looking for some help. Thanks.
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10/03/18

How long will it take?
It took 6.3 minutes for 25 mL of argon to reach the end of an effusion tube with a porous barrier. How long will it take for 25 mL of CHCl3 to effuse throuh the tube under the same conditions?
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10/03/18

A student completed the synthesis of salicyclic acid just as we did in our laboratory activity. They used 2.925 g of methyl salicylate, 3.5 mL of 6.0 M NaOH, an
A student completed the synthesis of salicyclic acid just as we did in our laboratory activity. They used 2.925 g of methyl salicylate, 3.5 mL of 6.0 M NaOH, and 4.1 mL of 6.0 M HCl. They obtained... more
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10/03/18

General Chemistry
What is the maximum mass of S8 that can be produced by combining 77.0g of each reactant? 8SO2+16H2S-->3S8+16H2O Answer: Number __ g S8
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10/02/18

How much less energy in kJ/g is provided by the mixture than by pure gasoline?
In some areas, gasoline is formulated to contain 15% ethanol during some seasons. If gasoline releases 11.4 kcal/g upon combustion, but ethanol releases only 7.12 kcal/g......
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10/02/18

Chemistry question
What is involved in changing Fe2+ to Fe3+ compared with C2O4 2-  to 2CO2 
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10/02/18

bacteria in living in the dark near a heat vent on the ocean floor will use photosynthesis
true or false?
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10/02/18

if you have powder bouillon and cubed bouillon which would speed up the process of making the soup
help me I'm so stunned I need the answer or I'm gonna fail grade 7 math.
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10/01/18

lost when 10.1 g of ethanol, C2H5OH, cools from 62.0 ∘C to -42.0∘C
Answer in Joules and rounded to 3 significant figures.
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10/01/18

Need help with solving this chemistry question
1a. Write a balanced equation and corresponding Ka expression for the ionization of the weak acid lactic acid(HC3H5O3, Ka=1.62x10^-4) in water b. A buffer solution is prepared by dissolving... more
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10/01/18

Need help with this chemistry question
a. Find the volume of 1.0M tartaric acid, H2C4H4O6, solution that when diluted to a total volume of 250.0ml produces a solution that is 0.050M in tartaric acid.b. Find the mass of potassium... more
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10/01/18

1.00 g of He, 14.0g F2, and 19.0 g Ar are placed in a 13.0-L container at 20.0 °C. The total pressure (in atm) in the container is _____ atm.
1.00 g of He, 14.0g F2, and 19.0 g Ar are placed in a 13.0-L container at 20.0 °C.The total pressure (in atm) in the container is _____ atm.
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10/01/18

Show the calculation required to obtain 0.05M CaCl2
Show the calculation required to obtain 0.05M CaCl2 (aq) value
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10/01/18

A certain liquid has a density of 0.70g/m. Find the mass of 6.4l of this liquid
What is the mass of 6.4 of this liquid   
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10/01/18

In the video, the water level was 15 milliliters before adding the chain, and 20 milliliters after adding the chain. When I weighed the chain, its mass was 73.5
I believe the chain is solid metal (not gold plated), but is probably a blend of gold and other metals. I looked up that gold has a density of 19.3 g/ml, while the other metals like silver and... more
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09/30/18

whats a mendelian trait
i need help for a apex question but I do not know the answer
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09/29/18

The relative percentage of muscle, fat, bone and other tissue of the body called?
A. Balance B. Aerobic capacity C. Lean muscle mass D. Body compoaition
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