11/08/20

entropy change question :)
Use each equation to predict whether the relative entropy change is Sproducts > Sreactants or Sproducts < Sreactants and whether ΔS > 0 or ΔS < 0 for the chemical reaction represented.... more
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11/08/20

Empirical and Molecular Formulas
When 3.145 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 9.207 grams of CO2 and 5.655 grams of H2O were produced.In a separate experiment, the molar mass of the... more
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11/08/20

Determining a chemical formula
Vitamin C has the formula CxHyOz. You burn 0.275 g of the compound in a combustion analysis chamber and isolate 0.413 g of CO2 and 0.112 g of H2O. Enter an integer or a decimal number, such as 2 or... more
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11/08/20

Element Compounds Chemistry
A. How many ATOMS of sulfur, are present in 1.44 moles of sulfur dichloride, SCl2?B. How many MOLES of chlorine are present in 1.09×1023 molecules of sulfur dichloride?C. How... more
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11/08/20

element composition
A sample of monochloro tetraborane (10), B4H9Cl, contains 3.1 mol of the compound. Determine the amount (in mol) of each element present and the number of atoms of each element present in the... more
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11/08/20

How many moles of iron(III) oxide is required to produce 26.4mol of iron? 2Fe2O3 +3C 4Fe+3CO2
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11/08/20

How many moles of carbon dioxide will be produced from the complete reaction of 12.9 mol of iron (III)oxide according to the following reaction? 2Fe2O3 +3C—-> 4Fe+3CO2
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11/08/20

If 14.5 moles of Cu and 15.9 moles of HNO3 are allowed to react, what is the maximum number of moles of NO that can be produced? 3CU+8HNO3——>3Cu(NO3)2 +2NO+4H2O
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11/08/20

What mass of water will be produced from the complete combustion of 22.2 g of ethane according to the following reaction? 2C2H 6 +7O2—->4CO2 +6H2O
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11/08/20

Equilibrium explanation
I'm learning the topic of equilibrium right now and can't seem to wrap my head around the topic. Could someone explain the concept of Kc/Qc (what does it represent) and why/how it is affected (or... more
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11/08/20

If 28.2g of nitrogen is produced in the following reaction, what mass of sodium is also produced? 2Na3N—-> N2 +6Na
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11/08/20

How many moles of oxygen will react with 13.7 moles of ethane according to the following reaction? 2C2H6 +7O2—->4CO2 +6H2O
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11/08/20

When 24.2 mole of aluminum reacts with excess oxygen according to the reaction, how many moles of aluminum oxide can be produced 4Al+3O2 ——->2Al2O3
When 24.2 mole of aluminum reacts with excess oxygen according to the reaction, how many moles of aluminum oxide can be produced 4Al+3O2 ——->2Al2O3
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11/08/20

How to get the answer to this problem? What's the answer?
You go to the doctor and he gives you 16.8 milligrams of radioactive dye. After 19.00 minutes, 4.00 milligrams of dye remain in your system. To leave the doctor's office, you must pass through a... more
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11/08/20

According to the following reaction, how many grams of sulfur trioxide will be formed upon the complete reaction of 26.9 grams of oxygen gas with excess sulfur dioxide?

According to the following reaction, how many grams of sulfur trioxide will be formed upon the complete reaction of 26.9 grams of oxygen gas with excess sulfur dioxide?sulfur dioxide (g)... more
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11/07/20

reaction stoichiometry
The unbalanced equation for the reaction between chlorine gas and sodium iodide is shown below.Balance the equation (enter the smallest integer possible in each box, including the integer "1" when... more
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11/07/20

reaction stoichiometry
The substances nitrogen monoxide and hydrogen gas react to form nitrogen gas and water. Unbalanced equation:  NO (g) + H2 (g) N2 (g) + H2O (l) In one reaction, 64.4 g of H2O is produced. What... more
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11/07/20

How to find equivalence point?
Hi!How do I find the equivalence point in a titration curve geometrically or pretty much close to exactly? I am used to people pointing to the middle of the steep slope and saying it is there, but... more
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11/07/20

Titration Curve Question
Hi!I have done a titration lab and drew a chart to represent the values I got. However, my chart turned out to be something strange. I will try to paste the picture in a comment below, since it... more
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11/07/20

Need help with this question
Which gas—nitrogen (N2) or oxygen (O2)— diffuses faster and at what relative rate? Both gases have the same temperature and pressure. Round the answer to three significant figures (rearrange the... more
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11/07/20

Identify the reactant that is oxidized (loses electrons) in this reaction
2HCl(aq) + Zn(s)  --->   H2(g)  +  Zn2+(aq) + 2 Cl–(aq)
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11/07/20

In this reaction, is CH3COOH is the ______ and NaHCO3 is the ______  (proctor donor/proctor acceptor)
CH3COOH(aq) + NaHCO3(aq)  ---> CH3COO–(aq)   +   H2CO3(aq)   Which of these two reactants is the source of the carbon and oxygen in the CO2 produced in step 2 of the reaction?
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11/07/20

CH3CH2OH, what is the electron pair and molecular geometries?
my answer is CH3CH2OH there are three interior atoms, two C and one O.The geometry around the first C is tetrahedral, the second C is tetrahedral. The geometry around the O is bent (tetrahedral) Is... more
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11/06/20

About the CH3CH2OH, ethanol
CH3CH2OH, ethanol, Does it molecular exhibit resonance? If so, how to show all possible forms? And does it molecule have any isomers? If so, how to show Lewis structures of them as well?
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11/06/20

Need Help with this questions.
1.) An unknown gas with a mass of 11.003 g and a volume of 6.630 L has a pressure of 760.00 torr at 37°C. Find its molar mass2.) What is the unknown gas in the first problem?Thank you for answering😀
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