212 Answered Questions for the topic College Chemistry

College Chemistry

03/13/22

Can I get some help please

You decide to take your car on a drive through, where gas is sold in liters and distances are measured in kilometers. Suppose your car's gas efficiency is 36.0 mi/gal. How many liters of gas will... more
College Chemistry

03/13/22

Can some please answer this.

Copper has a density of 2.96 g/cm3. What is the volume of 5.91 g of copper?Note: You must enter your answer with the proper units. Use a caret (^) to indicate an exponent if necesssary.

02/11/22

I need help in my Chemistry...

What is the procedure and solution in performing these? How many mL of 0.310 M barium nitrate are required to precipitate as barium sulfate all the sulfate ions from 28.0 mL of 0.380 M aluminum... more
College Chemistry Chemistry

11/10/21

Need chemistry help

The volume of a driver-side air bag is 80.0 L. Calculate the number of moles of CO2 needed to fill the air bag and the grams of sodium bicarbonate and milliliters of vinegar needed for the... more
College Chemistry Chemistry

10/14/21

Most of the ultraviolet radiation reaching the surface of the earth is UV-A radiation, which has a wavelength range of 315 nm to 400 nm.

UV-A radiation is a cause of skin aging and also contributes to development of skin cancer. Determine the energy of a mole of photons of UV-A radiation that have a wavelength of 325 nm
College Chemistry Chemistry

10/14/21

Suppose an oven’s radiation wavelength is 0.125 m. A container with 300.00 g of water was placed in the oven, and the temperature of the water rose from 20.0°C to 80.0°C.

How many photons of this microwave radiation were required to heat the water? (Assume that all the energy from the radiation was used to raise the temperature of the water.)
College Chemistry Science Chemistry Moles

06/15/21

4NH3 + 5O2 = 4NO + 6H2O How many grams of Oz were required to make 10.00 grams of H20?

Grateful for any help given!
College Chemistry Science Chemistry Moles

06/15/21

4NH3 + 5O2 = 4NO + 6H2O How many grams of O2 are needed to completely react with 3.315 moles of NH3?

Grateful for any help given!
College Chemistry Science Chemistry Moles

06/15/21

4NH3 + 5O2 = 4NO + 6H2O If you made with 9.67 moles of H20, how many moles of NO were also produced?

Already balanced equation I keep getting this one wrong and I'm not sure if it's my setup or if I'm dividing something wrong. Grateful for any help given!
College Chemistry Science Chemistry Moles

06/11/21

Mass of CaCl2: 10,0 g Mass of Na2CO3: 10.0 g Actual amount collected: 2.00 g CaCO3 1. Write a balanced chemical equation.

A student performs a lab at school. They massed out both reactants and then mixed them together. The reaction produced a precipitate. They filtered out the product and took the mass of it. (I'm a... more
College Chemistry Science Chemistry Moles

06/10/21

H2SO4 + 2 NaOH = Na2SO4 + 2 H2O How many grams of Na2SO4 could be produced from 4.94 moles of sulfuric acid?

Grateful for any help given!

From the data below, calculate the total heat (in J) needed to convert 0.816 mol of gaseous ethanol at 300.0°C and 1 atm to liquid ethanol at 25.0°C and 1 atm:

b.p. at 78.d degrees Ccgas: 1.43 J/g. degrees CDelta Hvap: 40.5 kJ/molcliquid: 2.45 J/g. degrees C

Sulfur dioxide is produced in enormous amounts for sulfuric acid production. It melts at −73.0°C and boils at −10.0°C....

Its DeltaH fus is 8.619 kJ/mol, and its DeltaH vap is 25.73 kJ/mol. The specific heat capacities of the liquid and gas are 0.995 J/g.K and 0.622 J/g.K, respectively. How much heat is required to... more
College Chemistry Chemistry

04/08/21

How to solve what the molarity is?

College Chemistry Chemistry

04/08/21

How do you solve, and do the work for this problem?

04/01/21

What type of reaction is this?

Al(s) + 3Ag(NO3)2(aq) ===> Al(NO3)2(aq) + 3Ag(s)Double displacement?

03/30/21

CHEMISTRY LIMITING REACTANT

The following data was collected when a reaction was performed experimentally in the laboratory. Reactants Products Al(NO3)3 NaCl NaNO3 AlCl3 Starting Amount in Reaction 4 moles 9... more

03/23/21

From the partial (valence-level) orbital diagram, write the ground-state electron configuration and group number.

5p __ __ __ (no arrows)4d __ __ __ __ __ (four up arrows)5s __ (one up arrow)

03/22/21

Write the symbol of the element from which this ion is derived and Write the formula of the oxide this ion forms.

The partial (valence-level) orbital diagram for a 3+ ion is: (3+ ion) 4s 3d 

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