States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
Hi,
I am doing a practice test and need to check my answers. All of this is for Chem 101
Please see attached:
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P Question 1
Which of these are pure substances?
L.
Steam
Crude oil
I.
Salt water
IV. Gun powder
V.
Охудen
VL Mercury
I, IL, and III
I and III
1, II, III, and V
I, III, and V
OI, V, and VI
Question 2
A sample of heptane always contains 84% carbon and 16% hydrogen. Which of these best explains this phenomena?
o Law of Constant Composition
o Law of Conservation of Mass
o Dalton's Atomic Theory
o Law of Mass Action
o Lavoisier's Law
Question 3
Which of these statements is not consistent with Dalton's atomic theory?
O All atoms of gold have the same chemical properties.
OElectrons are equally distributed throughout an atom.
OThe properties of sodium are different from the properties of chlorine.
o Compounds are formed when atoms combine in simple whole number ratios.
O Atoms are rearranged in normal chemical reactions but are neither created nor destroyed.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F80366bbd-a758-40e7-b9ec-8d2e3445db54%2F7a97de1d-385a-4928-83e0-0d016f65605a%2Fi1v4k9x_processed.png&w=3840&q=75)
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