Chemistry » Page 49

Chemistry

Lesly

If a gas has an initial pressure of 101kPa and a volume of 10L, then it expands to a volume of

20L what is the new pressure?

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Chemistry

Clara Ball

Which acid has the formula hno2? hydronitric acid hydronitrous acid nitric acid nitrous acid hydornitridic acid

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Chemistry

Dario Booker

How can you make clay float in water?

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Chemistry

Broderick Wagner

Molar mass of Fe2O3 = g/mol

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Chemistry

Bentley Frey

What is the mass of 1.91 x 1023 C6H12O6 molecules?

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Chemistry

Amour

An atom with the electron configuration 2-8-2 would most likely?

a. decrease in siz

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Chemistry

Guest

18,754kg of methanol which has a density of 0.788g/cm3 what is the volume

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Chemistry

Emmalee Brock

How is enthalpy used to predict whether a reaction is endothermic or exothermic?

A) When the enthalpy of the reactants is higher than the enthalpy of the products, the reaction is endothermic.

B) When the enthalpy of the products is higher than the enthalpy of the reactants, the reaction is exothermic.

C) When the enthalpy change of the reaction is positive, the reaction is exothermic.

D) When the enthalpy change of the reaction is positive, the reaction is endothermic

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Chemistry

Sienna Frank

In a calorimetry experiment, it was determined that a 92.0 gram piece of copper metal released 1860 J of heat to the surrounding water in the calorimeter (qcopper = - 1860 J). If the final temperature of the copper metal-water mixture was 25.00°C, what was the initial temperature of the copper metal? The specific heat of copper is 0.377 J / (g°C). Group of answer choices Tinitial = 28.6°C Tinitial = - 28.6°C Tinitial = 78.6°C Tinitial = 92.6°C Tinitial = 53.6°C

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Chemistry

Bear

If i walk 25 steps north than 75 steps south, what is my final position

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Chemistry

Jocelyn Hale

At a different temperature (this means that Keq will be different than part a)), 6.0 mol of IF5 and 8.0 mol of I4F2 are placed in a 10.0 L container. At equilibrium, 6.0mol of I4F2 are left. Calculate the Keq for the new temperature.

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Chemistry

Lena Garrison

Rachel carson wrote this book, which exposed the deadly impact of ddt and chemical pesticides on wildlife.

a. penn environment

b. conservation protection

c. rites of spring

d. silent spring

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Chemistry

Jordyn Krueger

Explain in terms of element classification, why K2O is an ionic compound

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Chemistry

Mollie

Describe a way to separate iron filings from sand.

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Chemistry

Claire Ortiz

Why does static friction work best in dry weather?

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