09/12/22

Answer the following questions based on an aqueous 7.28 M copper(II) bromide stock solution
Determine the concentration (in M) of bromide ions in a solution prepared by adding 399 mL of water to 10.3 mL of the stock solution of copper(II) bromide solution.I got 1.83e-1, 0.183 and 0.188... more
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09/12/22

How many grams of oxygen are required to react with 14.0 grams of octane ( C8H18 ) in the combustion of octane in gasoline?

How many grams of oxygen are required to react with 14.0 grams of octane (C8H18C8H18) in the combustion of octane in gasoline?  
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09/12/22

Why should the temperature of the sample be controlled during the refractive index measurement?
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09/12/22

The density of nonadecane, C19H40, is 0.7860 g/mL. Calculate the volume occupied by 9.355 moles of nonadecane.
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09/12/22

chemist requires 0.734 mol Na2CO3 for a reaction. How many grams does this correspond to?
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09/12/22

Formula mass of water, and sulfuric acid in amu. Keep at least one decimal place in atomic masses from the periodic table.
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09/12/22

contains neon has an internal volume of 6.88 L. A pressure gauge attached to the cylinder reads 1870 psi (1 atm =14.7 psi) at 22.1 ∘C. What mass of neon is contained in the cylinder?
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09/12/22

releasing 31.91 g of C2H2F3Cl in the air every week. If the leak is not fixed, how many kilograms of fluorine will be released into the air over 6 months? Assume there are 4 weeks in a month.
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09/11/22

Concentration of Ionic Species
What are the concentrations of the various ionic species in a 0.1M solution of lysine at pH 4, 7, and 10?Studying for an exam and this is a study question. I need help making a step by step so I... more
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09/11/22

a metallurgust has one allot containing 26% aluminum and another containing 37% aluminum. How many pounds of each alloy must he use to make 53 pounds of a third alloy containing 31% aluminum

find the pounds of alloy containing 27% aluminum find the pounds of alloy containing 37% aluminum
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09/11/22

Answer in scientific notation
Convert 35dg to kg Convert 0.003ml into microliter Convert 5nm to micrometer Convert 750 microliter to centiliters Convert 100x10^3 m into km
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09/11/22

List the elements from most energy being released by gaining an electron to least
F,Kr,Al
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09/11/22

What quantum numbers specify these subshells
4s5p3d
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09/10/22

Chemistry Question
If you have a solution containing 42.36 g of lead(II) chlorate that is allowed to react completely with a solution containing 7.23 g of sodium sulfate, how many grams of solid precipitate will... more
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09/09/22

Gas laws (Balancing equations)
Calculate the volume of hydrogen measured at 91C and 80mmHg which is evolved when 12g og magnesium are treated with excess hydrochloric acid. Write a balanced equation
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09/09/22

What are the n and l quantum numbers for the electrons with the highest energy in each of the following atoms?
a)Srb)Inc)Hgd)Cd
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09/09/22

Give the number of s, p, d, and f electrons in each of the following atoms.
Cd(Z=48)Fr(Z=87)Cr(Z=24)
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09/09/22

An element has two naturally occuring isotopes with the following masses and abundances...what is the atomic mass of this element?
ISOTOPE1- Isotopic mass (amu) = 49.9472- Fractional abundance = 2.500 × 10-3ISOTOPE2- Isotopic mass (amu) = 50.9440- Fractional abundance = 0.9975...part (b) What is the identity of the element?
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09/09/22

How much energy is emitted by 9.4 mg of sodium atoms emitting light at a wavelength of 5.8E-7 m? Answer in units of J.
How much energy is emitted by 9.4 mg of sodium atoms emitting light at a wavelength of 5.8E-7 m? Answer in units of J.
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09/08/22

When someone burns wood in a fire, the person is:
A. Destroying MatterB. Converting MatterC. Breaking down elementsD. Converting energy to mass
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09/08/22

Calculate the temperature change in the water upon the complete melting of the ice.
An 8.2-gg ice cube is placed into 265 g of water. Calculate the temperature change in the water upon the complete melting of the ice. Assume that all of the energy required to melt the ice comes... more
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09/08/22

Electrochemistry
What is the maximum energy produced when 15.0 g of Zn is completely reacted in a Zn-Cu electrochemical cell that has an average cell potential of 1.05 V? for the following reaction: Zn(s) +... more
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09/08/22

Chemistry empirical and molecular formula
A 7.893 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis and 20.41 grams of CO2 and 4.179 grams of H2O are produced.In a separate experiment, the... more
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09/08/22

If a laser has a wavelength of 429nm, what is the frequency of this radiation in megahertz?

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09/08/22

What is the wavelength (in nanometers) of a photon of light with an energy of 8.14x10^-18 J.

I dont understand but it says to report to the correct number of sig figs and units. Thank you in advance
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