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Chemistry

Clarence Vincent

The most active of all the chemical elements is a halogen known as

A. iodine.

B. fluorine.

C. astatine.

D. bromine.

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Chemistry

Eric Michael

A certain gas is present in a 11.0 l cylinder at 3.0 atm pressure. if the pressure is increased to 6.0 atm, the volume of the gas decreases to 5.5 l. find the two constants ki, the initial value of k, and kf, the final value of k, to verify whether the gas obeys boyle's law.

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Chemistry

Itzel Mcknight

An example of the Hertzsprung-Russell diagram is shown above. Using this diagram, what can you say about white dwarfs? (Hint: Notice that the temperature on the x-axis is hotter on the left and cooler on the right.) A. They are very bright and hot. B. They are very bright, but relatively cool. C. They are relatively dim, but very hot. D. They are relatively dim and cool.

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Chemistry

Jeremiah Glover

You have decided to test the effects of five garden fertilizers by applying some of each to five separate rows of radishes. what is the variable you are testing? what factors should you control? how will you measure the results?

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Chemistry

Karma Hunt

2. Convert 0.0489 g to mg

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Chemistry

Gummi Bear

How did the development of the earliest idea about atoms differ from the later work of scientists?

A. It was based on sound evidence.

B. There were explanations for the idea.

C. It was based on the thoughts of an early philosopher.

D. There were experiments conducted to support the idea.

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Chemistry

Hailey Schaefer

Why can't a lead storage battery be recharged indefinitely?

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Chemistry

Kaila

How many liters of 1.88 M solution can be made with 29.5 grams of lithium fluoride?

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Chemistry

Tomas Carr

Why do your legs appear shorter when standing in water

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Chemistry

Cheeky

Calculate the volume of c2h2 that is collected over water at 23 ∘c by reaction of 1.53 g of cac2 if the total pressure of the gas is 755 torr. (the vapor pressure of water is 21.07 torr.)

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Chemistry

Echo

A realistic representation of population growth is the?

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Chemistry

Grimes

Lithium-6 has a mass of 6.0151 amu and lithium-7 has a mass of 7.0160 amu. The relative abundance of Li-6 is 7.42% and the relative abundance of Li-7 is 92.58%. Based on this data alone, calculate the average atomic mass for lithium to the correct number of significant digits.

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Chemistry

Francesca Salazar

Describe how the land and ocean nitrogen cycles are similar

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Chemistry

Damien Hodges

How are solids and liquids different than gases in terms of volume changes

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Chemistry

Maia

What type of bond is methane?

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