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Chemistry

Which of the following is not an SI

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Chemistry

What happens to electrical energy as a light bulb lights

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Chemistry

You can also enter units that are combinations of other units. Keep in mind that you have to indicate the multiplication of units explicitly either with a multiplication dot or a dash. The weight of an object is the product of its mass, m, and the acceleration of gravity, g (where g = 9.8 m/s2). If an object's mass is m = 10. kg, what is its weight?

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Chemistry

50 pts What role does gravity play in the water cycle?

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Chemistry

F a bouncing ball has a total energy of 20 J and a kinetic energy of 5 J, the ball's potential energy isJ.

If the kinetic energy of the ball decreases, then the potential energy will.

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Chemistry

Cold packs are often used to prevent swelling of certain athletic injuries. The pack contains ammonium nitrate and water in separate compartments. When the pack is squeezed, the partition breaks mixing the components and forming a solution that turns very cold.

Below is the reaction:

NH₄NO₃ (s) → NH⁺⁴ (aq) + NO₃⁻ (aq)

Based on the information above, is the reaction endothermic or exothermic?

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Chemistry

You are given a bottle of an organic liquid and told it must be either cyclohexane or 1-hexene. Which of the following statements is (are) true about these two compounds? Multiple Choice Statements A (The two compounds can be differentiated by their mass spectra because they will have molecular ions at different masses), B (1-Hexene will show an absorption at 1650 cm-1 but cyclohexane will not), and (Both cyclohexane and 1 - hexene will show C-H absorptions at about 2950 cm-1) are all true. 1-Hexene will show an absorption at 1650 cm-1 but cyclohexane will not. The two compounds can be differentiated by their mass spectra because they will have molecular ion peaks at different m/z. Both cyclohexane and 1-hexene will show C-H absorptions at about 2950 cm-1. Statements B (1-Hexene will show an absorption at 1650 cm-1 but cyclohexane will not) and C (Both cyclohexane and 1-hexene will show C-H absorptions at about 2950 cm-1) are bot

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Chemistry

Consider that calcium metal reacts with oxygen gas in the air to form calcium oxide. suppose we react 6.84 mol calcium with 4.00 mol oxygen gas. determine the number of moles of calcium oxide produced after the reaction is complete.

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Chemistry

How many grams of oxygen are needed to react with 4.6 grams of titanium (IV) chloride

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Chemistry

What is the difference between extensive and intensive physical properties?

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Chemistry

The equation A + BX ® AX + B is the general equation for a

a.

double-replacement reaction.

c.

replacement reaction.

b.

decomposition reaction.

d.

combustion reaction.

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Chemistry

he Food and Drug Administration (FDA) mandates that all vinegar sold in the United States must have a minimum concentration of 4% acetic acid by mass. Calculate the minimum molarity of acetic acid in vinegar according to this standard. Assume the density of vinegar is the same as for water.

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Dominique Richard

Chemistry

Which of the following is a postulate of the kinetic-molecular theory? A. Gases are made up of particles that act like small, soft spheres that are always moving in a calculated fashion. B. Gas particles travel in a random pattern until they hit a container wall or another gas particle. C. The distance between gas particles is equal to the size of the particles themselves. D. Gas particles have no force of attraction on one another or to the walls of the container.

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Chemistry

An atom's outermost electron arrangement determines how it interacts with other atoms. Which of the following atomic structures would be most likely to form an ionic bond? A. neon, which has eight outer electrons B. carbon, which has four outer electrons C. helium, which has two outer electrons D. fluorine, which has seven outer electrons

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Omari Schneider

Chemistry

The main acid in the stomach is hydrochloric acid (HCl). Which chemical equations show a reaction that occurs when someone takes an antacid? Check all that apply.

HCl + NaOH - >NaCl + H2O

2HCl + CaCO3 - > CaCl2 + CO2 + H2O

2HCl + Mg (OH) 2 - > MgCl2 + 2H2O

6HCl + 2Al - > 2AlCl3 + 3H2

HCl + NaHCO3 - > NaCl + H2O + CO2

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