03/16/21

Benzoyl peroxide (C14H10O4) is a substance used as an acne medicine. What is the mass in grams of 3.50 x 10-2 mole of benzoyl peroxide?
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03/16/21

Gas Laws Chemistry

A sample of hydrogen gas at 320 K experiences a change in volume from 3.80 L to 4.03 L. If it’s new pressure is 3.27 atm at 236 K, what was its original pressure in atmosphere?
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03/16/21

Chemistry Gas Laws
A 51.7 L sample of nitrogen gas experiences a change in pressure from 117.5 kPa to 97.7 kPa. What is the resulting volume in liters of the temperature changes from 44 degrees C to 31 degrees C?
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03/16/21

how many grams of oxygen gas was required for the reaction to occur?
The combustion of propane gas is used to fuel barbecue grills. If 57.3 grams of water vapor were produced from a grilling session, how many grams of oxygen gas was required for the reaction to... more
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03/15/21

chemistry/mathematics
Determine the energy, in J, of a photon with a wavelength of 309 nm. (h = 6.626 × 10⁻³⁴ J • s and c = 3.00 × 10⁸ m/s)
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03/15/21

Thermochemistry Question
Inez convinces her brother Marcel to sign up for ballroom dancing. Due to their weight difference Inez will burn 325 Calories/hour, but Marcel will burn 449 Calories/hour. The class is composed of... more
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03/15/21

Please solve this
The Johnson family purchased tickets for a concert. They bought some amount of adult tickets for $4 each and 12 child tickets for $8 each. They paid a total of $104. How many adult tickets did they... more
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03/15/21

A 53kg skateboarder pushes on the ground with -351N of force to set himself moving. How fast will the skateboarder accelerate?
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03/15/21

how many of each were sold
your school sells 125 tickets to the play that consist of student and adult tickets. Student tickets are $6.00 and adult tickets are $8.50. If the school makes $950, how many of each were sold
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03/15/21

chemistry 107-109
How many g of Br2 are needed to form 73.4g AlBr3?
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03/14/21

A chemist requires 0.269 mol Na2CO3 for a reaction. How many grams does this correspond to?
A chemist requires 0.269 mol Na2CO3 for a reaction. How many grams does this correspond to?
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03/14/21

What's the answer

Find the equation of the line though point (5,4) and perpendicular to y= -4/3x-2
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03/14/21

Most of human society is powered by the oxidation of hydrocarbons (ex. Octane {C8H18}-- a principal component of gasoline) in combustion reactions.
Most of human society is powered by the oxidation of hydrocarbons (ex. Octane {C8H18}-- a principal component of gasoline) in combustion reactions.a) In terms of matter spread and energy spread,... more
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03/14/21

The combustion of propane may be described by the chemical equation C3H8(g)+5O2(g)⟶3CO2(g)+4H2O(g) How many grams of O2(g) are needed to completely burn 97.5 g C3H8(g)?
The combustion of propane may be described by the chemical equation C3H8(g)+5O2(g)⟶3CO2(g)+4H2O(g) How many grams of O2(g) are needed to completely burn 97.5 g C3H8(g)?
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03/14/21

Can someone please help me with this question?
The Kinetic Theory of Matter explains why____A. the atoms in a gas are always in motionB. the atoms in a liquid are always in motionC. the atoms in a solid are always in motionD. All of the aboveE.... more
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03/13/21

how many atoms are in 0.11 moles of aluminum
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03/13/21

Determine which of the following H atom electron transitions has the longest wavelength and which has the shortest wavelength:
(a) n = 1 to n = 6(b) n = 4 to n = 6(c) n = 4 to n = 9(d) n = 2 to n = 11Would the longest be b and the shortest be a?
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03/13/21

Given: O3, T2: 934.26K, V1: 1.343L. V2: 7.707 L. Wanted kelvins? 
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03/13/21

Given: O3, T2: 934.26K, V1: 1.343L. V2: 7.707 L. Wanted kelvins?
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03/13/21

Given: C2H6, P1: 192.58 kPa, P2: 527.82 kPa, V2: 70.925L. Wanted: liters of C2H6 
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03/13/21

2(x+y) and (x+y)^2
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03/13/21

Given: Ar P1: 3.5107 atm P2: 4.7902 atm V1: 63.805 L T1: 287.32 K T2: 512.3 K Wanted: liters of Ar?
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03/13/21

If you have 600 kJ of heat to spend, and you use it to melt lead, how many ¼ ounce wheel weights (at 20 oC)can you melt?

If you have 600 kJ of heat to spend, and you use it to melt lead, how many ¼ ounce wheel weights (at 20oC)can you melt? Note that Lead is NOT measured in troy ounces, but proper ones (16 ounces in... more
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03/13/21

The orbitals that are filled when Germanium is reacting are which, among the following? 
The orbitals that are filled when Germanium is reacting are which, among the following? A) 3s B) 3p C) 2d D) 3p E) 4p
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03/12/21

HELP! stoichiometry has gotten the best of me
Nitrogen dioxide gas and water are placed in a closed container and react to form an aqueous solutionof nitric acid and nitrogen monoxide gas under STP conditions. The following data table... more
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