Which of the following is a mixture? – Physical Science help?!?
Which of the following is a mixture?
carbon dioxide
silicon
silicon dioxide
sand
Which of the following is a heterogeneous mixture?
water in a swimming pool
sugar water
a jar of mixed nuts
stainless steel
A material that is malleable and conducts electricity is most likely
wood.
ice.
a metal.
motor oil.
Which of the following is a physical change?
sawing a piece of wood in half
burning a piece of wood
rust forming on an iron fence
a copper roof changing color from red to green
This question was entered in error. Please choose any answer below to receive credit.
Flammability is a material’s ability to burn in the presence of
oxygen.
oxygen.
oxygen.
oxygen.
An element has a fixed composition because it contains only one type of
Measuring________________can be used to test the purity of some substances.
________________is a process that could be used to separate dissolved particles from the liquid in a solution.
Maybe you should read your textbook a little more, but:
1. Sand is a mixture of mostly quartz and many other materials
2. This question has no solution, since the water in a swimming pool contains dissolved chlorine, the suger water contains dissolved sucrose, and stainless steel has dissolved carbon and chromium.
3. A metal
4. Sawing a piece of wood in half simply changes the physical shape; the other 3 change the chemical properties of the material.
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Maybe you should read your textbook a little more, but:
1. Sand is a mixture of mostly quartz and many other materials
2. This question has no solution, since the water in a swimming pool contains dissolved chlorine, the suger water contains dissolved sucrose, and stainless steel has dissolved carbon and chromium.
3. A metal
4. Sawing a piece of wood in half simply changes the physical shape; the other 3 change the chemical properties of the material.
References :
You need to do your own homework. So, I am going to help like this:
Which of the following is a mixture? First you need to know that a mixture is a physical combination of two or more pure substances. So, if you look each of these possiblities up, you will have your answer.
Which of the following is a heterogeneous mixture? What is heterogeneous mixture? It is a mixture with different appearances in different parts. Whereas a heterogeneous mass: a dump site is a heterogeneous mass. Think about it, picture it, you will get it.
A material that is malleable and conducts electricity is most likely___? First what is malleable?
Main types of elements:
Metals – generally hard, lustrous elements that are ductile, malleable, and conduct electricity.
Nonmetals – generally gases or soft solids that do not conduct electricity.
Metalloids – have properties between metals and nonmetals
Knowing that, you have your answer.
Which of the following is a physical change? You have physical change and chemical change. If rust appears on metal, that is a chemical change because it changes it’s density. If you have a block of wood and turn it to sawdust, the sawdust is still wood. But if you burn it, it is no longer wood, it has physically changed. Get it?
An element has a fixed composition because it contains only one type of____? Check out your encyclopedia.
Measuring________________can be used to test the purity of some substances.
What is a pure substance? It is a substance that is made up of only one kind of partical and is the smae throughout. Think about that and you will have your answer.
________________is a process that could be used to separate dissolved particles from the liquid in a solution Particals are in constant motion. Heat will cause them to more faster and rise.
Good luck.
References :