02/04/22

A 0.513 g sample of steam at 106.2 C is condensed into a container with 4.80 g of water at 15.3 C
What is the final temperature of the water mixture if no heat is lost? The specific heat of water is 4.18 J/g x C, the specific heat of steam is 2.01 J/g x C, and delta H vap = 40.7 kJ/mol.
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02/04/22

Aqueous hydrobromic acid (HBr) reacts with solid sodium hydroxide (NaOH) to produce aqueous sodium bromide (NaBr) and liquid water (H2O).
What is the theoretical yield of sodium bromide formed from the reaction of 4.0g of hydrobromic acid and 3.4g of sodium hydroxide? Round your answer to 2 significant figures.
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02/04/22

PLEASE HELP HONORS CHEMISTRY

0.4230 g sample of impure sodium nitrate (contains sodium nitrate plus inert ingredients) was heated, converting all the sodium nitrate to 0.1720 g of sodium nitrite and oxygen gas. Determine the... more
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02/04/22

formula mass and atomic mass
A sample of a substance with the empirical formula XCl2 weighs 0.4530 g. When it is dissolved in water and all its chlorine is converted to insoluble AgCl by addition of an excess of silver... more
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02/04/22

analyze a mixture
A mixture of CrCl2 and inert material is analyzed to determine the Cr content. First the mixture is dissolved in water. Then all of the chloride ion is precipitated as AgCl by the addition of an... more
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02/04/22

combustion of CHO
A 3.920 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis and 9.889 grams of CO2 and 1.735 grams of H2O are produced.In a separate experiment, the molar... more
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02/04/22

Calculating the volume at STP

What is the volume of 5.00 x 10^22 molecules of carbon dioxide gas at STP?
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02/04/22

Two 20.0 g ice cubes at -20.0 C are placed into 225 g of water at 25.0 C
Assuming no energy is transferred to or from the surroundings, calculate the final temperature, Tf of the water after all the Ice melts.heat capacity of H2O(s) = 37.7 J/ mol x Kheat capacity of H2O... more
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02/04/22

Chemistry- thermochemistry
How much glucose (in g) must be metabolized to completely evaporate 1.00 g of water at 37 °C, given that ∆cHglucose = -2803.00 kJ mol-1? In other words how much glucose is needed to evaporate water... more
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02/03/22

how would i calculate the heat produced by this reaction?
When 25.0 mL of 1.5 M H2SO4 (aq) and 50.0 mL of 2.0 M NaOH(aq), both at 25.0 °C are added to a coffee cup calorimeter, the temperature of the mixture reaches a maximum of 28.9 °C. What... more
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02/03/22

Calculate the TOTAL number of electrons, protons and neutrons in 5.85g of NaCl.
I am getting this as the answer-Total no. of e- = 168.616 x 10^22Total no. of p+ = 168.616 x 10^22Total no. of n = 180.66 x 10^22IS IT CORRECT?
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02/03/22

Which of the following is the correct R value to be used when the pressure is given in KPa? * 62.4 0.0821 8.314 273.15
Which of the following is the correct R value to be used when the pressure is given in KPa? *1) 62.42) 0.08213) 8.3144) 273.15
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02/03/22

using 4Fe+3O2=2Fe2O3 how many moles of O2 are reacted to form 2.12 mol Fe2O3?
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02/03/22

Stoichiometry help #9
Given the reactant amounts specified in each chemical equation, determine the amount in moles of excess reactant that remains.(a) HCl + NaOH —> NaCl + H2O2.0 mol HCl and 3.9 mol NaOHamount of... more
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02/03/22

How many grams of Fe are needed to form 5 grams of Fe2O3?
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02/03/22

Stoichiometry help?
(a) If 5.90 mol of ethane, C2H6, undergo combustion according to the unbalanced equation given below, how many moles of oxygen are required?C2H6 + O2 —> CO2 + H2O_ mol(b) How many moles of each... more
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02/02/22

What would be the mass of an O2 gas having a volume of 72L at a pressure of 22.7mmHg and a temperature of 87oC.
What would be the mass of an O2 gas having a volume of 72L at a pressure of 22.7mmHg and a temperature of 87oC.
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02/02/22

A sample of neon (Ne) gas has a pressure of 277KPa at 56 o . Calculate the density of the gas.
A sample of neon (Ne) gas has a pressureof 277KPa at 56 o . Calculate the density ofthe gas.
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02/02/22

Gaseous butane (CH3(CH2)2 (CH3) reacts with gaseous oxygen gas (O2) to produce gaseous carbon dioxide (CO2) and gaseous water (H2O)
What is the theoretical yield of water formed from the reaction of 4.65g of butane and 26.5g of oxygen gas? Round your answer to 3 significant figures.= _____ g
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02/02/22

The standard (1 bar) boiling point of acetone is 56.1 C, and its enthalpy of vaporization is 29.1 kJ/mol. Calculate the vapor pressure of acetone at 41.7 C.
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02/02/22

Liquid octane (CH3(CH2)6 CH3) will react with gaseous oxygen (O2) to produce gaseous carbon dioxide (CO2) and gaseous water (H2O).
Suppose 10. g of octane is mixed with 61.2 g of oxygen. Calculate the maximum mass of water that could be produced by the chemical reaction. Round your answer to 2 significant digits.= ______ g
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02/02/22

Aqueous sulfuric acid (H2SO4) will react with solid sodium hydroxide (NaOH) to produce aqueous sodium sulfate (Na2SO4) and liquid water (H2O).
Suppose 18. g of sulfuric acid is mixed with 24.3 g of sodium hydroxide. Calculate the minimum mass of sulfuric acid that could be left over by the chemical reaction. Round your answer... more
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02/02/22

Chemistry concentration

A solution of CuSO4 has a concentration of 1.342x10^-5M. Find the concentration of Cu^2+ in the solution in ppm. Assume density is 1.000 g/mL?
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02/02/22

Aqueous hydrobromic acid (HBr) will react with solid sodium hydroxide (NaOH) to produce aqueous sodium bromide (NaBr) and liquid water (H2O).

Suppose 46.1 g of hydrobromic acid is mixed with 10. g of sodium hydroxide. Calculate the maximum mass of sodium bromide that could be produced by the chemical reaction. Round your answer... more
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02/02/22

Chemistry question

A 19.0 cm piece of copper pipe has a mass of 28.40 g. What is the length of pipe if it has a mass of 17.0 kg?
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