Chemistry » Page 31

Chemistry

Hugo Casey

Condensation is the change from liquid to water cycle

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Chemistry

Guest

The large winds that circle the Earth occur because the equator

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Chemistry

Evangeline Rhodes

Suppose you are working with a NaOH stock solution but you need a solution with a lower concentration for your experiment. Calculate the volume of the 1.224 M stock NaOH solution needed to prepare 250.0 mL of 0.1281 M dilute NaOH solution.

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Chemistry

Villarreal

Carbon has an atomic mass of 12amu and an atomic number of 6. how many neutrons, protons and electrons are in a neutral atom of carbon-12? answers

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Chemistry

Makayla Todd

Which practice is a sustainable method of food production?

A. Using drip irrigation systems to conserve water

B. Allowing chemical pollutants to build up in soil

C. Creating a monoculture crop over large areas

D. Practicing high-density livestock farming

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Chemistry

Keyla Daniel

What is Al-27 in chemistry?

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Chemistry

Bryson Mcdonald

For practice, the molecular formula for ascorbic acid is C6H8O6, and you used 6 g in this experiment, calculate the molarity of the ascorbic acid. Now calculate the concentration in moles per drop (assume 1 mL = 20 drops)

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Chemistry

Cash

A fish in the sea in the deep ocean has a lure that lights up to attract mates and prey. Why would it need this in adaptation

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Chemistry

Ahmad Stanton

What is the si unit for the quantity of particles in a sample?

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Chemistry

Abdullah

1. For each of the following compounds label all protons with the predicted splitting pattern it would exhibit in a 1H-NMR spectrum

A) 3-Hydroxyacetophenone

B) Acetophenone

C) 3-Methylbenzaldehyde

D) 4-Hydroxy-3-methoxybenzaldehyde (vanillin)

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Chemistry

Rigoberto

Part 2:Construct a graph of temperature versus time. Put temperature on the y-axis and time on the x-axis. Graph all three sets of data on the same graph. Use a different colored pencil for each test material. Provide a key on the graph relating the pencil color to the test material. Calculate the change in temperature from start to finish for the air and each of the samples and record on your data sheet. Which water sample lost the least amount of heat energy over the 6-minute time interval? Was the rate of heat loss constant during each experiment? How can you tell? Which material was the best insulator? Which material was the least effective insulator? Write a summary paragraph discussing this experiment and the results. Summarize the conclusions that you can draw from this experiment. Explain why the design of the bird's nest provides good insulation for the eggs.

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Chemistry

Kennedi Cantrell

Which of the following is not true of alloys?

a. Alloys are made of two or more metals combined physically.

b. The mixture of metals in an alloy is based upon the desired use.

c. Alloys can be substitutional or interstitial.

d. An example of an alloy is copper.

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Chemistry

Ean Simpson

Give two examples of any heritage tree that could be affected by environmental factors.

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Chemistry

Ayaan Figueroa

Which situation is an indication that a chemical change has occurred?

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Chemistry

Alvin Franklin

Which of the following statements is true of nuclear fusion?

It involves the splitting of an atom's nucleus.

It is the process currently used in most nuclear power plants.

It is a very endothermic process.

It occurs with very small atoms with low mass.

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