09/14/20

Calculate the amount of heat required to raise the temperature of a 94 g sample of water from 31 ∘C to 66 ∘C.
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09/14/20

Write which prefix is represented by each of the following sets of symbols
Write which prefix is represented by each of the following sets of symbols:-M-m-p-h-d-da-k-n
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09/14/20

methyl red end point detection
What volume in millilitres of 0.06176 M HCl is required to titrate 50.00 mL of solution containing 0.02159 M NaHCO3 and 0.0245 M Na2CO3 to a methyl red end point?
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09/14/20

The density of titanium is 4.506 g/cm^3. What volume is occupied by 2.20 g of titanium? Record the answer with three decimal places.

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09/14/20

A large piece of iron has a density of 7.87 g/ml. What is the density of a piece of iron that is two times heavier?
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09/14/20

Gas stoichiometry?
Please help enlighten me on how to solve the following:1. If 4.000 grams of hydrogen peroxide is placed within a sealed 250 milliliter container at 500 K.What is the pressure of the oxygen gas... more
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09/14/20

Help with Graham's law

What is the formula weight of a gaseous element if at room temperature it effuses though apinhole 2.16 times as rapidly as Xenon? Which element is it?
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09/13/20

How much heat must you remove if you want to lower the temperature of 350 g of steel (c = 0.11 cal/gºC) from 18.0 ºC to 12.0 ºC? Express this answer in both calories and Joules.
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09/13/20

I am lost on this homework at this time and my teacher is unavailble

The human body can eliminate ethanol (through metabolism, evaporation, etc.) at an approximate rate of 15 g per hour. Given that one milliliter of ethanol has a mass of 0.789 g, how long will it... more
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09/13/20

What is the maximum mass of S8 that can be produced by combining 92.0 g of each reactant? 8SO2+16H2S⟶3S8+16H2O
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09/12/20

I need help solving this problem
A 4.46 g sample of lead oxide was reacting with carbon and 4.14 g of lead was obtained. Calculate the empirical formula of lead oxide.
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09/12/20

How do I do this ?? Please be detailed
A compound made of two elements, iridium (Ir and oxygen (O), was produced in a lab by hitting iridium Wall exposed to air. The following data was collected:mass of crucible: 38.26 gmass of ... more
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09/12/20

Exothermic and Endothermic reaction.
The definition of both, examples and more
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09/12/20

Calculate the pH of the solution when the equivalence point has been reached in the titration of 0.0450 M KOH against 25.00 mL of 0.233 M HOCl. pKa = 7.45.
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09/11/20

If you burn 33.7g of hydrogen and produce 301g of water, how much oxygen reacted?
In the combustion of hydrogen gas, hydrogen reacts with oxygen from the air to form water vapor.Hydrogen + Oxygen —> WaterIf you burn 33.7g of hydrogen and produce 301g of water, how much... more
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09/11/20

Predict anode, cathode, and overall reaction of electrolyzed aqueous solution of salts
Predict the anode, cathode, and overall cell reactions when an aqueous solution of each of the following salts is electrolyzed in a cell having inert electrodes.a. NaBrb. CuCl2c. LiOH
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09/11/20

Predict half reactions of electrolysis of MgCl2
List the anode and cathode half-reactions that might occur when an aqueous solution of MgCl2 is electrolyzed in a cell having inert electrodes. Predict which half-reactions will occur, and justify... more
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09/11/20

8 stoichiometry questions

1) Sulfur burns in excess air to form sulfur dioxide according to the equation: S(s)+O2(g)-> SO2(g)What volume of sulfur dioxide is produced (at room temperature and pressure) from 24g of... more
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09/10/20

The air pressure for a tire is 109 KPa. What is this pressure in atmospheres?
The air pressure for a tire is 109 KPa. What is this pressure in atmospheres?
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09/10/20

acetone is a common solvent that has a density of .7899 g/mL. What volume of acetone , in milliliters , has a mass of 43.2

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09/10/20

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Calculate the percent composition of the following compounds. Part 1- Sodium Sulfate____ % Na____ % S____ % OPart 2-Dinitrogen Tetroxide_____ % N_____ % O
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09/10/20

Read the Description

Which of the following compounds have the same empirical formula?A- CH4OB- C2H8O4C- C3H12O3D- C5H20O5E- C4H14O4F- C10H40O10
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09/10/20

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Use the following balanced reaction: Na2CO3 + Ca(HC2H3O2)2 —> 2NaHC2H3O2 + CaCO3If you have 7.95 moles of Na2CO3 and 9.20 moles of Ca(HC2H3O2)2, how many moles of NaHC2H3O2 will be... more
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09/10/20

I need help solving this problem

A bar of silver weighs 0.800kg; what is the weight of at in grams , milligrams and pounds? 1lb= 454g
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09/10/20

I need help solving this problem

Average density of earth is 5.5 g/cm^3 and it weighs 6.0x10^27g. What is the earths volume in cubic kilometers and liters??
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