<span>Answer: option 3) magnesioum reacts with an acid.
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<span>Justification:
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<span>1) Malleability, conduction of electricity, and boiling point are physical properties.
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<span>2) Maleability is the ability to be transformed into foil. It is just a change in form. So, it is a physical property.
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<span>3) The metals conduct electricity in virtue of the array of the atoms, which permtis the flow of the electrons, but it does not involve a chemical change, so it remains being a physical proerty.
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<span>4) Boling point is the temperature at which a substance passes from liquid state to gas state, which are just different forms of the same substance. So, it is other physical property.
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<span>5) Reaction with an acid is indeed a chemical transformation: the metal (magnessium) will form a chemical bond with some spieces of the acid to form a new compound. This is a chemical reaction in virtue of the chemcial properties of the substance (its ability to react with acids)</span>
Chemical energy is converted to thermal energy.
Answer:
suddenly I have brain damage
Answer:
See the answer below
Explanation:
<em>The carbon will have to travel in the form of CO2 from the atmosphere to a primary producer (green plant), from there to a primary consumer (herbivorous animal), and finally to a secondary consumer.</em>
The primary producer (a green plant) would fix the carbon in the CO2 to carbohydrate through a process known as photosynthesis. The equation of the process is as shown below:
The carbon, now in the form of carbohydrate, would then be picked up by an animal (a primary consumer) that feeds on the green plant. The carbon would eventually get into a secondary consumer when the secondary consumer feeds on the primary consumer that fed on the green plant.
Answer:
2Al2O3 --> 4Al + 3O2
Explanation:
Ok so balancing equations means that there is an equal amount of atoms on both sides.
So let's list how much there is on each side
Reactants:
Al-2
O-3
Products:
Al-1
O-2
First of all, oxygen has 2 on the products side but 3 on the reactants side. If you add a 2 to Al2O3 and a 3 to O2, they will have the same amount.
Al-4
O-6
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Al-1
O-6
Ok now we need the Al to be balanced. This can be done by putting a 4 in front of Al.
Al-4
O-6
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Al-4
O-6
It looks like a lot of work but over time you should be able to just look at it and know what's missing!!