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Gretchen Raymond
Chemistry
What are the four peices of matter
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Parker Clements
Chemistry
An aqueous is the same as liquid water?
true
false
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Guest
Chemistry
What four elements did the ancient greeks think the world was made of?
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Shea Stephens
Chemistry
A mixture of H2 and water vapor is present in a closed vessel at 20°C. The total pressure of the system is 755.0 mmHg.
Partial pressure of water vapor at 20°C equals 17.5 mmHg.
What is the partial pressure of H2?
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Cesar Sanford
Chemistry
1) If the average atomic mass of hydrogen in nature is 1.0079, what does that tell you about the percent
composition of H-1 and H-2 in nature?
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Nathanael Richmond
Chemistry
If you wanted to perform a controlled experiment to test the effect of temperature on the pressure of a bicycle tire, which of the following would be necessary?
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Arabella Parrish
Chemistry
Name the chief ore of silver.
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Kamden Salazar
Chemistry
In an electron dot diagram of ethylene (C2H4), how many double bonds are present? A. none B. one C. two D. three
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Jaylyn Donaldson
Chemistry
Given the following information, identify which of these are the same element. Be sure to explain your answer.
Element 1: 6 protons, 6 neutrons, 6 electrons
Element 2: 7 protons, 6 neutrons, 7 electrons
Element 3: 6 protons, 7 neutrons, 7 electrons
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Pratt
Chemistry
What will happen to water in a cup if the cup is placed inside a sealed bag and left in a warm area?
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Enzo
Chemistry
What are two forms of friction that oppose the motion of a moving car
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Guest
Chemistry
If a molecule contains two carbon atoms and four hydrogen atoms, what can you conclude about the bond between the carbon atoms? ... ?
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Eliza Frye
Chemistry
When a solution of nitric acid is added to a to solution of calcium hydroxide, the salt formed has what formula?
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Regan Woods
Chemistry
Scientists follow specific processes in order to determine valid explanations and conclusions from scientific data. Students graduating from Rydell High School in 2010 were asked to fill out an exit survey the last week of school. When students were asked to compare language arts courses with science courses, 20% of males reported preferring language arts and 80% reported preferring science. For females, 90% reported preferring language arts and 10% reported preferring science. Which of the following would be a valid conclusion based on the data from this study
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Guest
Chemistry
Instructions: Select the correct answer.
An electromagnet is a device in which moving electric charges (current) in a coil of wire create a magnet.
What's one advantage of using electromagnets in devices?
A. Electromagnets have a strong, constant magnetic field.
B. Electromagnets are more powerful than permanent magnets.
C. Electromagnets don't need a source of electricity to work.
D. Electromagnets can easily be turned on and off.
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