10/10/20

how many grams of barium sulfate will be formed upon the complete reaction?
According to the following reaction, how many grams of barium sulfate will be formed upon the complete reaction of 27.9 grams of sulfuric acid with excess barium hydroxide?Ba(OH)2 (aq)... more
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10/10/20

Calculate the equilibrium temperature of the water.
A 47.0g sample of brass, which has a specific heat capacity of 0.375·J·g−1°C−1, is dropped into an insulated container containing 300.0g of water at 15.0°C and a constant pressure of 1atm. The... more
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10/10/20

Zn(s)+2HCl(aq)⟶ZnCl2(aq)+H2(g) How many milliliters of 5.50 M HCl(aq) are required to react with 7.35 g Zn(s)?
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10/10/20

C7H6O3+C4H6O3⟶C9H8O4+C2H4O2student started with 3.70 mL acetic anhydride (density=1.08 g/mL) and 1.65 g salicylic acid.synthesized 1.81 g of aspirin. find theoretical and percent yield of aspirin
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10/10/20

When octane (C8H18) is burned in air, it chemically reacts with oxygen gas (O2) to produce carbon dioxide (CO2) and water (H2O). What mass of water is produced by the reaction of 1.3g of oxygen gas?
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10/10/20

Which atom is larger? Zr or Sn and why?
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10/10/20

Please someone help
Problem: 0.1156 g CxHyNz reacts with oxygen, O2, to give 0.1638 g CO2, 0.1676 g H2O, and N2. Find the empirical formula of the organic compound. CxHyNz + O2 → CO2 + H2O + N2 To determine the... more
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10/10/20

For which of the following reactions...
For which of the following reactions is the value of delta(H)_reaction equal to the delta(H)_final for the products?a) 2C(s,graphite) + 2H_2(g) --> C_2H_4b) N_2 (g) + O_2 (g) --> 2NO... more
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10/10/20

If this reaction produced 80.1 g KCl, how many grams of O2 were produced?
When heated, KClO3 decomposes into KCl and O2. 2KClO3 -> 2KCl + 3O2If this reaction produced 80.1g KCl, how many grams of O2 were produced?(I don't know if pictures are available to be uploaded,... more
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10/09/20

How do I solve this problem
If 1201 J of heat is available what is the mass in grams of Iron ( specific heat = 0.45 J/g C) that can be heated from 22.5 Celsius to 120.0 Celsius
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10/09/20

Express your answer with the appropriate units.
Naproxen is used to treat the pain and inflammation caused by arthritis. Naproxen has a formula of C14H14O3.How many moles of C are present in 2.45 moles of naproxen?How many moles of H are present... more
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10/09/20

Calculate each of the following quantities in 1.50 moles H3PO4:
moles of Hmoles of Oatoms of Patoms of O
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10/09/20

Calculate the equilibrium temperature of the water.
A 46.0g sample of aluminum, which has a specific heat capacity of 0.897·J·g−1°C−1, is dropped into an insulated container containing 100.0g of water at 60.0°C and a constant pressure of 1atm. The... more
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10/09/20

What is its concentration in M?
The equation for the calibration curve of a set of standards is y=4.8571x+0.0038. If a sample of the same solution has an absorbance reading of 0.85, what is its concentration in M? (Only enter... more
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10/09/20

Use the provided information to determine ΔHorxn for the following reaction:
Use the provided information to determine ΔHorxn for the following reaction: CCl4 (g) + 4 HCl (g) → CH4 (g) + 4 Cl2 (g) Substance ΔH°f (kJ/mol) CH4 (g) −75.0 CCl4 (g) −96.0 HCl... more
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10/09/20

Given the following balanced equation, select all statement(s) that is/are True.

Given the following balanced equation,2 Na(s) + 2 H2O(l) → 2 NaOH(aq) + H2(g)  ∆Hrxn = −368.4 kJSelect all statement(s) that is/are True.Group of answer choicesA. The temperature of the solution... more
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10/09/20

Calculate the specific heat capacity of quartz according to this experiment.

A 52.3 g sample of quartz is put into a calorimeter that contains 150.0 g of water. The quartz sample starts off at 95.3 C and the temperature of the water starts off at 25.0 C. When the... more
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10/09/20

Redox Terminology question
You add sulfuric acid into CuO, turning the solution into a blue color.In the next step, you add Zn(s) to the blue solution. What is the purpose of adding Zn(s) in this step? Explain by using... more
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10/09/20

Sample 5.26 g of liquid 1‑propanol,C3H8O,is combusted with 31.8 g of oxygen gas.Carbon dioxide and water are the products. How many grams of the excess reactant remain after the reaction is complete?
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10/09/20

A closed gas system initially has volume and temperature of 5.43L and 831K with the pressure unknown. If the same closed system has values of 616torr, 7310mL and 228.00C, -
what was the initial pressure in atm?
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10/09/20

A gas system has an initial temperature of 119 C with the volume unknown. When the temperature changes to 298.0 K the volume is found to be 4.77 L What was the initial volume in L?
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10/09/20

A gas system has pressure, volume and moles of 2652 torr, 1670mL and 0.684moles, respectively. What is the temperature in C? (1 atm=760 torr; R = 0.08206 L atm/mol K )
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10/09/20

How to calculate this chemical equation?
You are given a mixture of KCl and KClO3. You add MnO2 as a catalyst to the mixture in a test tube and heat the test tube to achieve constant mass.Determine the percent composition of KClO3 in the... more
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10/09/20

For the chemical reaction 3KOH+H3PO4⟶K3PO4+3H2O how many moles of potassium phosphate will be produced from 32.0 g of potassium hydroxide?
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10/09/20

True or False. You cannot provide statistics with a qualitative analysis. You can only provide statistics if the experiment is quantitative
You cannot provide statistics with a qualitative analysis. You can only provide statistics if the experiment is quantitative
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