Chemistry » Page 62

Chemistry

Shiloh Sullivan

For which kingdom would you most likely need a magnifying lens or microscope to study the organisms

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Chemistry

Abel Johnston

How can indicator be used to determine if a solution is an acid or base

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Chemistry

Gracie Figueroa

A student blows up a ballon and then places it in a very cold freezer the ballon shrunk after hours why?!

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Chemistry

Mike Summers

if the temperature of 800.0 g h2O increases by 45 degree c how much heat (in joules and in calories) was added to the water?

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Chemistry

Kaia Hernandez

Mrs. Smith's sixth grade science class conducted a class project on the effects of UV-B radiation on salamanders. The class designed and performed an experiment testing the effects of UV-B on salamander egg hatching success. The results of their experiment are shown in the graph.

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Chemistry

Carmelo Peck

Is "isotope" another name for an atom?

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Chemistry

Zion Benitez

What nuclear reaction takes place inside stars?

A. Decay series

B. Neutron bombardment

C. None of these

D. Nuclear fusion

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Chemistry

Layne Salas

How are the two types of glaciers similar and how are they different

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Chemistry

King Colon

Which event would be impossible to explain by using John Dalton's model of the atom?

A) An iron atom emits particles when it is struck by light.

B) An oxygen atom combines with two hydrogen atoms to form water.

C) An acid reacts with a base to form salt and water.

D) The atoms in sodium metal react with water.

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Chemistry

Guest

Convert the concentration of SO2 from 80 μg/m3 to units of parts per million. The gas has a temperature of 25˚C and a pressure of 101.325 kPa. (Problem 2-56)

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Chemistry

Nicholas Knox

Calculate the enthalpy change for the reaction Ca (s) + N2 (g) + 3O2 (g) ⟶Ca (NO3) 2 (s) from the following equations: 8Ca (s) + Ca (NO3) 2 (s) →Ca3N2 (s) + 6CaO (s) ΔH = - 3304 kJ Ca3N2 (s) ⟶3Ca (s) + N2 (g) ΔH = + 432 kJ 2CaO (s) ⟶2Ca (s) + O2 (g) ΔH = + 1270 kJ

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Chemistry

Landon Beard

Predict the relative strengths of the carbon-halogen bonds in CH3FCH3F, CH3ClCH3Cl, and CH3BrCH3Br. Rank from strongest to weakest. To rank items as equivalent, overlap them.

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Chemistry

Danica Vance

Area of science that studies tiny partials like atoms

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Chemistry

Katelyn Rivas

According to the law of conservation of mass, mass is neither created nor destroyed in any ordinary chemical reaction. Which of the following is a demonstration of this law? Group of answer choices a. When iron reacts with oxygen to form rust, the mass of the iron atoms increases. b. When carbon dioxide breaks down into carbon and oxygen, the number of atoms always remains the same. c. When sodium and chlorine combine to make salt, some of the sodium is always lost. d. When hydrogen and oxygen combine to make water, oxygen atoms are converted to hydrogen atoms.

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Chemistry

Shaniya

Chose the two factors that work together to create the global wind patterns that operate in the atmosphere.

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