315 Answered Questions for the topic General Chemistry

02/27/21

Will the volume of a gas increase, decrease, or remain unchanged for the following set of changes?

The pressure is increased from 1.04 atm to 7.08 atm, while the temperature is decreased from 215°C to 122°C.
Follows • 1
Expert Answers •1

02/26/21

Wondering where I went wrong in this problem...Ammonium nitrate, a common fertilizer, is used as an explosive in fireworks and by terrorists. It was the material used in the tragic explosion...
at the Oklahoma City federal building in 1995. How many liters of gas at 307°C and 1.00 atm are formed by the explosive decomposition of 86.6 kg of ammonium nitrate to nitrogen, oxygen, and water... more
Follows • 1
Expert Answers •1

02/26/21

In a collision of sufficient force, automobile air bags respond by electrically triggering the explosive decomposition of sodium azide (NaN3) to its elements. A 29.4−g sample of sodium azide was...
decomposed, and the nitrogen gas generated was collected over water at 26°C. The total pressure was 733.8 mmHg. How many liters of dry N2 were generated?
Follows • 2
Expert Answers •1
General Chemistry Chemistry Moles College Chemistry

02/12/21

I keep getting lost on this question: In a combination reaction, 1.54 g of lithium is mixed with 6.56 g of oxygen.....
a) Which reactant is present in excess? I got Lithium being the LR. b) How many moles of the product are formed?I got 3.32 g Li2Oc) After the reaction, how many grams of each reactant and product... more
Follows • 2
Expert Answers •1

02/11/21

Calculate the theoretical yield of aspirin if you started with 1.75 g of salicylic acid.
Synthesis of Aspirin Pre-Lab Question
Follows • 1
Expert Answers •1
General Chemistry Chemistry Moles College Chemistry

02/10/21

In a combination reaction, 1.62 g of lithium is mixed with 6.87 g of oxygen. Answer a, b, and c. I am lost.

a) Which reactant is present in excess?b) How many moles of the product are formed?c) After the reaction, How many grams of each reactant and product are present?Blank g LiBlank g O2Blank g LI2O
Follows • 2
Expert Answers •1

02/10/21

A mixture of KClO3 and KCl with a mass of 0.950 g was heated to produce O2. After heating, the mass of residue was 0.740 g. Assuming all the KClO3 decomposed to KCl and O2, calculate the mass percent
of KClO3 in the original mixture
Follows • 1
Expert Answers •1

02/10/21

A person's blood alcohol (C2H5OH) level can be determined by titrating a sample of blood plasma with a potassium dichromate solution. The balanced equation is
16H+(aq) + 2Cr2O72-(aq) + C2H5OH(aq) > 4Cr3+(aq) + 2CO2(g) + 11H2O(l)If 35.46 mL of 0.05961 M Cr2O72- is required to titrate 27.90 g of plasma, what is the mass percent of alcohol in the... more
Follows • 3
Expert Answers •1

02/10/21

Give the oxidation number of antimony in the following:
a) SbH3b) H2SbO4-c) SbCl3
Follows • 3
Expert Answers •1

02/10/21

How many milliliters of 0.593 M HCl are needed to react with 22.4 g of CaCO3?
2HCl(aq) + CaCO3(s) > CaCl2(aq) + CO2(g) + H2O(l)I got 755.48 mL but I know that is wrong.
Follows • 1
Expert Answers •1

02/09/21

Sodium hydroxide is used extensively in acid-base titrations because it is a strong, inexpensive base. A sodium hydroxide solution was standardized by titrating 42.18 mL of 0.1753 M...
standard hydrochloric acid. The initial buret reading of the sodium hydroxide was 1.08 mL, and the final reading was 31.51 mL. What was the molarity of the base solution? I got 0.2212 M but it... more
Follows • 2
Expert Answers •1

02/09/21

The mass percent of Cl− in a seawater sample is determined by titrating 25.00 mL of seawater with AgNO3 solution, causing a precipitation reaction....
An indicator is used to detect the endpoint, which occurs when a free Ag+ ion is present in a solution after all the Cl− has reacted. If 57.50 mL of 0.2036 M AgNO3 is required to reach the... more
Follows • 2
Expert Answers •1
General Chemistry Chemistry

02/06/21

What is the formula mass of the polymer?
A 250 mL solution containing 25.4 g of polymer in toluene had an osmotic pressure of 0.155 atm at 28 degree Celsius. What is the formula mass of the polymer?
Follows • 1
Expert Answers •1
General Chemistry Chemistry Mass College Chemistry

02/05/21

Calculate the densities of both the water and the isopropyl alcohol and the percent error...
The accepted value for the density of water is 1.00 g/mL and the accepted density for isopropyl alcohol is 0.786 g/mL.percent error = experimental density minus accepted density divided by accepted... more
Follows • 1
Expert Answers •1
General Chemistry Chemistry Volume Mass

02/05/21

Calculate the density of the magnet and bolt...
Magnet:Mass (g) = 7.93 gInitial volume of graduated cylinder = 7.00 mLFinal volume of graduated cylinder = 9.00 mLObject volume = 2.00 mLDensity (g/mL) ?Bolt:Mass (g) = 6.61 gInitial volume of... more
Follows • 2
Expert Answers •1
General Chemistry Chemistry Mass College Chemistry

02/02/21

A certain oxide of vanadium is 32.02% oxygen by mass. Determine the empirical formula of this compound.
Follows • 1
Expert Answers •1

02/02/21

A 2.004-gram sample of calcium is completely reacted with oxygen to produce 2.804 g of calcium oxide. What is the mass percentage of oxygen in calcium oxide?
I got 28.5 percent. Is that correct?
Follows • 2
Expert Answers •1
General Chemistry Math Chemistry College Chemistry

02/02/21

A graduated cylinder is filled with water to a volume of 44.0 mL. When an irregularly shaped solid piece of metal was added, the volume increased to 47.2 mL. If the piece of metal had a mass of 45.5 g
what is the density of the metal?
Follows • 2
Expert Answers •1

02/02/21

Which of the following relationships is incorrect?
I am really bad at this stuff. a) 10-6 milliliters = 1 literb) 1 microliter = 106 litersc) 1 gram = 10-3 kilogramsd) 100 centimeters = 1 meter
Follows • 2
Expert Answers •1

02/02/21

How many significant figures does the result of the following operation have? 8.5201 + (1.932 x 5.45)
Follows • 2
Expert Answers •1
General Chemistry Chemistry Moles College Chemistry

02/01/21

Potassium nitrate decomposes on heating, producing potassium oxide and gaseous nitrogen and oxygen: 4KNO3(s) → 2K2O(s) + 2N2(g) + 5O2(g) to produce 71.8 kg of O2, how many...
a) Moles of KNO3 must be heated?b) Grams of KNO3 must be heated?
Follows • 2
Expert Answers •1
General Chemistry Chemistry Scientific Notation Mass

02/01/21

Allyl sulfide gives garlic its characteristic odor. Give the mass and number of carbon atoms.
a) The mass in grams of 2.62 mol of allyl sulfide. Answer in scientific notation.b) The number of carbon atoms in 72.8 g of allyl sulfide. Answer in scientific notation.
Follows • 1
Expert Answers •1
General Chemistry Chemistry Mass College Chemistry

01/31/21

Calculate the mass in milligrams of 3.16 × 10 ^ 20 formula units of Bi(NO3)3 · 5H2O. Enter your answer in scientific notation.
Follows • 2
Expert Answers •1
General Chemistry Math Chemistry College Chemistry

01/29/21

Carry out the following calculation, making sure that your answer has the correct number of significant figures:
7.80 g divided by 15.9 g minus 8.37 g
Follows • 1
Expert Answers •1
General Chemistry Math Chemistry College Chemistry

01/29/21

A cylindrical tube 14.7 cm high and 1.60 cm in diameter is used to collect blood samples. How many cubic decimeters (dm3) of blood can it hold (V of a cylinder = πr2h)?
Give your answer to the correct number of significant figures. The answer is blank dm3Not scientific notation.
Follows • 1
Expert Answers •1

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.