Chemistry, 18.11.2020 22:20, ruchierosanp1n3qw
True or False. For any statements you believe are false, change the words in the statement that would make it true and highlight them in yellow.
Oxygen (O2) is a mixture.
Air is a molecule.
An element is made out of only one kind of atom.
The atoms in a pure element are not bonded together.
The atoms in a molecule are not bonded together.
When looking at drawings of a molecule, the âspheresâ often represent molecules and lines or sticks represent the bonds connecting them.
A molecule could be made of the same atoms or different atoms that are bonded together.
Ozone (O3) is made of three oxygen atoms and is a compound.
Water, salt and carbon dioxide are molecules.
Water, salt, and carbon dioxide are all compounds.
NaCl is made out of four different kinds of atoms.
H2O2 is made up of 2 hydrogen atoms and 2 oxygen atoms.
Ammonia (NH3) is a compound.
A water molecule is in the shape of a triangle.
A carbon dioxide molecule is made up of single bonds.
Bonds are formed when the electrons in the outer shell are shared or transferred.
Atoms are the building blocks of elements, molecules, compounds, and mixtures.
Sodium Chloride, or table salt, is a compound.
Air is a mixture of many different gas molecules.
Pizza is a heterogeneous mixture.
Salt water is a heterogeneous mixture.
A solution is when one substance dissolves in another.
In Kool Aid, water is the solute.
In Kool Aid, the sugar is the solute.
Another word for air is oxygen.
Often when you look at the drawing of a compound, you will notice that there are different colored âspheresâ bonded together.
Tap water has many things dissolved in water. This means that tap water is a homogeneous mixture.
Solutions are homogeneous mixtures.
Pure water (H2O) is a compound and a molecule.
Answers: 1
Chemistry, 22.06.2019 01:00, mutoni55
Consider three unlabeled bottles, each contain small pieces of one of the following metals. - magnesium - sodium - silver the following reagents are used for identifying the metals. - pure water - a solution of 1.0 molar hcl - a solution of concentrated hno3 (a) which metal can be easily identified because it is much softer than the other two? describe a chemical test that distinguishes this metal from the other two, using only one of the reagents above. write a balanced chemical equation for the reaction that occurs. (b) one of the other two metals reacts readily with the hcl solution. identify the metal and write the balanced chemical equation for the reaction that occurs when this metal is added to the hcl solution. use the table of standard reduction potentials (attached) to account for the fact that this metal reacts with hcl while the other does not. (c) the one remaining metal reacts with the concentrated hno3 solution. write a balanced chemical equation for the reaction that occurs. (d) the solution obtained in (c) is diluted and a few drops of 1 m hcl is added. describe what would be observed. write a balanced chemical equation for the reaction that occurs.
Answers: 2
Chemistry, 22.06.2019 02:30, carsonjohnsonn
If a 12-v battery is connected to a circuit that has a current of 3.0 a, what is the total resistance in the circuit? 36 ohms 4 ohms 0.25 ohms
Answers: 1
Chemistry, 22.06.2019 10:30, freddhendrickss
When the speed of the bottle is 2 m/s, the average maximum height of the beanbag is m.
Answers: 2
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