10/18/20

Chemistry Oxidazition Reduction
Fe + Cd2+Fe2+ + CdIn the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing agent and the reducing agent.name of the element... more
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10/14/20

How many moles are present in 175 grams of MgSO3?
 How many moles are present in 175 grams of MgSO3?
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10/13/20

The Haber process is used to make ammonia, Using the equation below, determine how many moles of ammonia will be formed from 8.55 mole of nitrogen.
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10/13/20

reactions, confused
A chemist measures the energy change during the following reaction:2NH3(g) --> N2(g) + 3H2(g) DeltaH: 160.kJUse the information to answer the following questions. Is the reaction endo- or exo-... more
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09/28/20

How to Get my Lesson Recorded

My daughter is currently having a Wyzant session with her chemistry tutor, Sona S. My daughter declined to have the lesson recorded in the beginning but the lesson seems to be harder so she changed... more
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09/28/20

What mass in grams of ammonia can be made from 120 g of H2?
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09/28/20

What mass of oxygen gas is produced by the reaction of 4.09g of carbon dioxide?

Green plants use light from the Sun to drive photosynthesis. Photosynthesis is a chemical reaction in which water H2O and carbon dioxide CO2 chemically react to form the simple sugar... more
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09/24/20

ionic bonds form when ions share electrons
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09/23/20

1. Write the following balanced nuclear equations:

A) Th-234 emits a beta particle and gamma rays.B) Alpha decay of Bi-212
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09/18/20

Alexander Fleming discovered penicillin:
C16H18N2O4S, in 1928 at the University of London. He isolated the compounds from a mold which had contaminated some of his experiments. Since then penicillin has been used as a general antibiotic... more
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09/18/20

An aqueous solution of 0.020 M Ba(NO3)2 is prepared. What is the concentration (in mol/L) of nitrate ions?
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09/18/20

About the dimensions of a cube
Gold Cube size islength: 25.36mmwidth: 25.66mmheight: 25.41mmmass of the gold cube is 145.4757gHow to calculate volume of the cube (cm^3)?and What is the density of the cube (g/cm^3)?
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09/18/20

How much sucrose (in g) would be required to make a 0.100 L solution at a concentration of 0.100 M?
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09/16/20

Iron(II) sulfate forms several hydrates with the general formula FeSO4 ·x H2O, where x is an integer. If the hydrate is heated, the water can be driven off, leaving pure FeSO4 behind.
Iron(II) sulfate forms several hydrates with the general formula FeSO4 ·x H2O, where x is an integer. If the hydrate is heated, the water can be driven off, leaving pure FeSO4 behind.Suppose a... more
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09/16/20

When heated, KClO3 decomposes into KCl and O2. 2KClO3⟶2KCl+3O2 If this reaction produced 40.6 g KCl, how many grams of O2 were produced?
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09/10/20

A 0.600 g sample of a carboxylic acid is burned in oxygen, producing 1.07 g of CO2 and 0.440 g of H2O. Determine the empirical formula of the carboxylic acid.
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09/10/20

If 675.0 g of glucose yields 106.0 mL of ethanol, what is the percent yield for the reaction?
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09/08/20

College Chemistry Help

So im trying to understand Line drawing structure better since im really confused on how to go about it on some formulas.How would i do a line drawing structure or condensed structural formula for... more
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09/08/20

read the description.

Disposable lighters contain butane (C4H10) and produce CO2 and H2O. Part 1-Complete and balance the chemical equation for this combustion reaction. Do not add states of matter. C4H10 + O2 —>... more
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09/06/20

Express your answer to four significant figures.
Some homes that use baseboard heating use copper tubing. Hot water runs through and heats the copper tubing, which in turn heats aluminum fins. It is actually the aluminum fins that heat the air... more
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09/06/20

CHEMISTYR HELP PLEASE
An unknown substance has a mass of 17.3  . When the substance absorbs 1.557×102  of heat, the temperature of the substance is raised from  to  . What is the most likely identity of the substance?An... more
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09/05/20

I need help figuring out this problem, please be detailed

In an experiment, the reaction of 10.00g of iodine product 144.9g of a compound formed of iodine and fluorine.a) what mass of fluorine was consumed in the reaction b) what’s the mass ratio of... more
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08/28/20

Rearrange the following equation to solve for n. PV = nRT *
A. n = PV / RB. n = PVRTC. n = RT / PVD. n = PVT / R
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08/28/20

Significant Figures come from ____________, and are used to describe the level of ____________ . *
A. instruments; accuracyB. instruments; precisionC. precision; instrumentsD. accuracy; instruments
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08/28/20

Calculate the following and report using the correct number of significant figures and correct e notation: 1020 x 4.388e18 *
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