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Chemistry

Rigoberto Lindsey

Determine the molarity of 50 mL of HCl solution with unknown concentration, titrated with 75 mL of 4.0 M NaOH.

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Chemistry

Kayden Crane

The host for this disease is the mosquito. Question 4 options: malaria HIV cholera small pox

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Chemistry

Tyler Pacheco

How many milliliters of 1.50 M magnesium sulfate soulution is required to supply 2.50 mole of this salt?

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Chemistry

Kaia Cline

What side does heat go on in an endothermic reaction?

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Chemistry

Amanda

Consider the chemical reaction represented below. CH4 + 2O2 CO2 + 2H2O + Heat Which of the following statements about this reaction is true? A. The reaction releases heat. B. Heat is absorbed by the reaction. C. The reaction releases oxygen. D. The reaction consumes water.

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Chemistry

Faulkner

Which phrase is a result of a scientific law? Daryl is a scientist at a research institute. He reviews articles written by other scientists. He conducts experiments after creating a hypothesis. Sometimes, he has to modify the hypothesis after conducting an experiment. Last week, he accidentally dropped his coffee mug, which then fell on the floor due to gravity.

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Chemistry

Azkaban

What are two elements that produce background radiation on earth and what do their decay equations look like?

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Chemistry

Bowers

Look up sodium in the Periodic Table (Na). Then, answer the following questions

The number of electrons in n = 1 level?

The number of electrons in n = 2 level?

The number of electrons in n = 3 level?

Choose the letter with the 3 correct answers.

1, 2, 8

8, 2, 1

2, 8, 1

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Chemistry

Sawyer Ellison

Which of the following statements correctly compares the relative size of an ion to its neutral atom? AThe radius of an anion is greater than the radius of its neutral atom. B The radius of a cation is greater than the radius of its neutral atom. CThe radius of an anion is identical to the radius of its neutral atom. D The radius of a cation is identical to the radius of its neutral atom.

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Chemistry

Reed

What exactly is carbon dating?

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Chemistry

Rachael Villa

When 1 mol of a fuel burns at constant pressure, it exchanges-3452 kJ of heat and does-11 kJ of workon the surroundings. What are ΔUand ΔH for the combustion of thisfuel?

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Chemistry

Keith Trevino

Oxygen and hydrogen are most likely to form what type of bond?

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Chemistry

Rylee Mason

How to remember first 20 elements of the periodic table

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Chemistry

Milagros Acevedo

How many electrons does fluorine have? How many electron shells? How many electrons are needed to fill the valence shell?

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Chemistry

Cierra Gallagher

What is the concentration of h + in a 0.150 m solution of the diprotic acid h2x? for h2x, ka1=4.5*10-6 and ka2=1.2*10-11?

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