09/03/20

) Rearrange the following equation to solve for T. PV = nRT

A. T = nR / PVB. T = PVnRC. T = PV / nRD. T = PVn / R
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09/03/20

Rearrange the following equation to solve for x: 7y=13x

A.. x = 13y/7B. x = 13/7yC. x = 7y/13D. x = 13y7
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09/03/20

A solution is prepared by dissolving 0.1707 grams of (NH4)2Ce(NO3)6 in 1.46 L of water. Calculate the concentration of NO3- in this solution in mg/L (ppm).
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09/03/20

Please read the description as this is a long question.

Pb(OH)Cl, one of the lead compounds used in ancient Egyptian cosmetics, was prepared from PbO according to the following ancient recipe: PbO + NaCl + H2O -> Pb(OH)Cl + NaOHpart 1- How many grams... more
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09/03/20

Calculate the freezing point and boiling point of an antifreeze solution that is 47.3% by mass ethylene glycol (HOCH2CH2OH) in water. Ethylene glycol is a nonelectrolyte.
Calculate the freezing point and boiling point of an antifreeze solution that is 47.3% by mass ethylene glycol (HOCH2CH2OH) in water. Ethylene glycol is a nonelectrolyte.Freezing point (in °C):... more
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09/03/20

At 25°C the vapor pressures of pentane and hexane are 513 and 152 torr, respectively. Solution is prepared by mixing 23 mL of pentane (density = 0.63 g/mL) with 69 mL of hexane (density = 0.66 g/mL).
Pentane (C5H12) and hexane (C6H14) combine to form an ideal solution. At 25°C the vapor pressures of pentane and hexane are 513 and 152 torr, respectively. A solution is prepared by mixing 23 mL of... more
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09/03/20

Calculate the mass of each electrode after 10.0 h.
For the problem below I am unable to solve the last part. This is what I got for the questions prior that relate to the problem: A zinc-copper battery is constructed as follows.Zn | Zn2+ (0.15 M)... more
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09/03/20

Answer this please!!
A solid sphere of silver with a diameter of 5.00 inches is worth how much (in dollars)? Volume of sphere=4/3 pi r3. Density of silver is 10.49 g/cm3. Price of silver is $392.34/pound. Report... more
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09/02/20

A 59.02 g sample of a substance is initially at 29.6 ∘C . After absorbing 244 cal of heat, the temperature of the substance is 164.7 ∘C . What is the specific heat (𝑆𝐻) of the substance?
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09/02/20

Sulfur dioxide is produced in enormous amounts for sulfuric acid production. It melts at −73.0°C and boils at −10.0°C.
Sulfur dioxide is produced in enormous amounts for sulfuric acid production. It melts at −73.0°C and boils at −10.0°C. ΔH^0 fus is 8.619 kJ/mol, and its  ΔH^0 vap is 25.73 kJ/mol. The specific heat... more
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09/02/20

From the data below, calculate the total heat (in J) needed to convert 0.707 mol of gaseous ethanol at 300.0°C and 1 atm to liquid ethanol at 25.0°C and 1 atm
From the data below, calculate the total heat (in J) needed to convert 0.707 mol of gaseous ethanol at 300.0 °C and 1 atm to liquid ethanol at 25.0°C and 1 atm:b.p. at 1 atm: 78.5 °C. ΔH^0... more
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09/02/20

Chemistry Home work help please

6. Name the following structures:a) CH3 CH2CH2CH3b) H2C=CHCH2CH3c) CH triple bond CHd) CH triple bond CCH2CH2CH2CH3
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09/02/20

Perform the following conversions. Please circle your answer. You must show your work and report your answer with the correct number of significant figures to receive full credit.

What is the volume of a cube in pints when the sides of the cube are 3.00 inches long? 
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09/02/20

Perform the following conversions. Please circle your answer. You must show your work and report your answer with the correct number of significant figures to receive full credit.

If 1 quirk equals exactly 6 squibs, and 1 squib equals 43.5 g, what is the mass of 245 quirks in pounds? 
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09/02/20

Perform the following conversions. Please circle your answer. You must show your work and report your answer with the correct number of significant figures to receive full credit.

If one of your strides while walking at a constant rate over a flat surface equals 0.60 yards, how many strides would it take to walk exactly one mile? 
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09/02/20

Do I need to round off to significant figures when converting units?
For example, I'm going to convert 87 kg to lbs using dimensional analysis. There are 2.20462 lbs in a kg. 1. How am I supposed to know how many decimal places of lbs should I use? 2. Assuming I... more
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09/02/20

What is 2.9×10^-7 centigrams converted to megagrams?
Please also provide the solution using dimensional analysis
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09/01/20

An aqueous solution of 2.7 M hydrochloric acid has a density of 1.1 g/mL. How many mmol of hydrochloric acid are present in 15.4 mL of this solution?

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08/31/20

STICHIOMETRY REACTION
For the following reaction, 27.6 grams of calcium hydroxide are allowed to react with 30.8 grams of hydrochloric acid.calcium hydroxide (aq) + hydrochloric acid (aq) calcium chloride (aq)... more
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08/31/20

STICHIOMETRY REACTION
For the following reaction, 5.75 grams of hydrogen gas are mixed with excess ethylene (C2H4) . The reaction yields 59.0 grams of ethane (C2H6) .hydrogen ( g ) + ethylene (C2H4) ( g )  ethane... more
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08/31/20

STICHIOMETRY REACTION
According to the following reaction, how many grams of bromine will be formed upon the complete reaction of 25.4 grams of bromine trifluoride?bromine trifluoride (g) bromine (g) + fluorine (g)
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08/31/20

stichiometry reaction
How many moles of methane (CH4) are required to react completely with 89.5 L of carbon tetrachloride according to the following reaction at 0°C and 1 atm?methane (CH4) (g) + carbon... more
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08/31/20

STOICHIOMETRY REACTION
How many grams of PbBr2 will precipitate when excess FeBr2 solution is added to 43.0 mL of 0.788 M Pb(NO3)2 solution?Pb(NO3)2(aq) + FeBr2(aq) PbBr2(s) + Fe(NO3)2(aq)
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08/31/20

STOICHIOMETRY REACTION
What volume of a 0.308 M hydrobromic acid solution is required to neutralize 23.9 mL of a 0.197 M sodium hydroxide solution
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08/31/20

STOICHIOMETRY REACTION
What volume of oxygen gas is produced when 29.1 g of mercury(II) oxide reacts completely according to the following reaction at 25 °C and 1 atm?mercury(II) oxide (s) mercury (l) + oxygen(g)
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