Questions and task on the subject: Chemistry

Questions and task on the subject: Chemistry

Chemistry

Ahigh school student acquired an emission spectrum of an unknown sample. he knew the unknown sample contained one of the elements, whose spectra are show below. the emission spectrum

P Answered by Specialist

10

Chemistry

Which statement correctly compares an atom of an alkali metal with an atom of the alkaline earth metal next to it on the periodic table? the alkali metal atom forms a +1 ion,

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170

Chemistry

Why is studying atoms and their parts and particles to people?

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83

Chemistry

Question 1 (true/false worth 4 points) (03.06 lc) an instantaneous dipole occurs when a molecule's moving electrons are briefly more concentrated in one place than another, causing

P Answered by PhD

48

Chemistry

Classify each of these reactions. ba(clo3)2(s)⟶bacl2(s)+3o2(g)ba(clo3)2(s)⟶bacl2(s)+3o2(g) acid–base neutralization precipitation redox none of the above 2nacl(aq)+k2s(aq)⟶na2s(aq)+2kcl(aq)2nacl(aq)+k2s(aq)⟶na2s(aq)+2kcl(aq)

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7

Chemistry

Which of these, if dissolved in 1.0 l of pure water, would produce a buffer solution? which of these, if dissolved in 1.0 l of pure water, would produce a buffer solution? 0.1

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1

Chemistry

Explain, i don't understand.7. for the combustion of ethyl alcohol as described in the above equation, which of the following is true? 8. the total volume of hydrogen gas is needed

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1

Chemistry

Pollen is located in the

receptacle
ovary
anther

which one, plz answer correctly !

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1

Chemistry

What is the mass of neon that exerts a pressure of 720. mmhg, with a temperature of -15.0 °c , when the volume of the container is 760. ml?

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Chemistry

What is the electron pair arrangement around the central atom in the molecule if5? a.) trigonal pyramidal b.) square planar c.) octahedral d.) square pyramidal

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1

Chemistry

Calculate the molar solubility of cd(oh)2 when buffered at a ph = 12.30. the ksp for cd(oh)2 is 2.5 x 10-14. calculate the molar solubility of cd(oh)2 when buffered at a ph =

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Chemistry

Agaseous mixture contains 434.0 torr h 2 ( g ) , 434.0 torr h2(g), 389.9 torr n 2 ( g ) , 389.9 torr n2(g), and 77.9 torr ar ( g ) . 77.9 torr ar(g). calculate the mole fraction,

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Chemistry

Name two nineteenth century scientists—one who developed the laboratory burner in common use today, and the other who studied the spectra of colored flames produced by a variety

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1

Chemistry

What 3 factors affect precipitation of a region

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3

Chemistry

Glycerol (c3h8o3, 92.1 g/mol) is a nonvolatile nonelectrolyte substance. consider that you have an aqueous solution that contains 34.4 % glycerol by mass. if the vapor pressure

P Answered by PhD

1