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Chemistry

Friday

For each scenario, determine if the electron has absorbed energy or emitted energy,

An electron jumps from n = 3 to n = 1.

An electron jumps from n = 2 to n = 3.

An electron jumps from n = 1 to n = 2.

An electron jumps from n = 3 to n = 2.

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Chemistry

Summer Dyer

One twelfth of the mass of a carbon-12 atom is used to define a

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Chemistry

Jaycee Duke

Calculate the heat lost by the hot water using your results for Experiment 3: Measuring the Enthalpy of Fusion of Water. Heat must be expressed in kilojoules (kJ). Q = (4.18 J/g °C) x (1 kJ/1000 J) x mass of water (g) x ΔT

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Chemistry

Rylee Glover

How many molecules are there in 8.00 grams of glucose, C6H12O6

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Chemistry

Stone

Based on the table you completed in question 1 what distinguishes a neutral atom from an ion answers

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Chemistry

Kamari Woodward

When dissolved in aqueous solution, which pair would behave as a buffer?

A) HCl and NaCl

B) KOH and KCl

C) HNO2 and NaNO2

D) HNO3 and NH4NO3

E) Ca (OH) 2 and CaSO4

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Chemistry

Stich

A mixture of C3H8 and C2H2 has a mass of 2.8 g. It is burned in excess O2 to form a mixture of water and carbon dioxide that contains 1.6 times as many moles of CO2 as of water.

Find the mass of C2H2 in the original mixture. Express your answer to two significant figures and include the appropriate units.

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Chemistry

Ansley Mcbride

This is a group 2 element that is called the alkaline earth metals. It burns with a very bright light

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Chemistry

Santino Luna

What happens to the total mass of the chemicals involved in the reaction as the reaction proceeds?

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Chemistry

Broderick Franklin

Why does the atmosphere allow life on planet Earth

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Chemistry

Regan Chen

How are alpha, beta and gamma radiation characterized in terms of mass and charge?

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Chemistry

Ava Maxwell

If 21 mL of gas is subjected to a temperature change from 10.0°C to 120°C and a pressure change from 1.0 atm to 15 atm, the new volume is: (Be sure to use the correct number of significant figures.) 1.9 mL 1.0 mL 0.53 mL 440 mL

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Chemistry

Amiyah Moon

1 2 3 4 5 6 7 8 9 10 Sheri studies to get good grades because this is what her parents expect of her. She wants to make them proud. This is an a. Intrinsic motivational statement c. Both of these b. Extrinsic motivational statement d. None of these

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Chemistry

Heidi Anderson

Which of the following statements is true?

A. Metals lose electrons to become cations.

B. Nonmetals gain electrons to become cations.

C. Metals gain electrons to become cations.

D. Nonmetals lose electrons to become cations.

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Chemistry

Ariel Murphy

A substance that contains hydrogen that maybe replaced by a metal is a

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