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Leokris [45]
3 years ago
12

WORTH 20 POINTS HELP PLEASE

Chemistry
1 answer:
Damm [24]3 years ago
5 0

Answer:

The answers to your questions are below

Explanation:

Physical change is when matter changes its form but is still the same substance.

Chemical change is when matter changes its composition.

iron and oxygen from rust  It's a chemical change because iron and oxygen form a new compound different from the reactants.

iron is denser brightly when ignited . This is a chemical property because iron reacts with oxygen.

oil and water do not mix it's a physical change, oil and water are in touch but they do not react.

mercury melts at -39°C it's a physical property because mercury changes from solid to liquid but it still is mercury.

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My high school chemistry is learning this and I don't understand it. "Heat is measured by the following equation:
tangare [24]

Answer:

you didn't ask a question so here is your explanation.

Explanation:

Q = mc∆T. Q = heat energy (Joules, J) m = mass of a substance (kg) c = specific heat (units J/kg∙K) ∆ is a symbol meaning "the change in"

5 0
3 years ago
Read the following chemical equation.
Anton [14]

Answer:

Bromine gains an electron

Explanation:

According to oxidation and reduction

8 0
3 years ago
Read 2 more answers
(Q014) Silicates a. are classified on the basis of what kind of metals they contain. b. form through the evaporation of water. c
Leni [432]

Answer: d. have the silicon-oxygen tetrahedron as their structural unit.

Explanation:

Silicates are anions that have both Oxygen and Silicon as the basis of their structure. These two form a tetrahedron type structure that enable them to be useful for a whole lot of things.

Silicates are very abundant on Earth as they comprise around 95% of the Earth's crust as well as the upper mantle which explains why they are mostly found in igneous rocks.

3 0
3 years ago
When molten rock undergoes crystallization above ground, what type of rock results?
vodka [1.7K]
I am pretty sure that the answer is B. extrusive rock. I hope that this helps you!! Good Luck!!
5 0
3 years ago
Read 2 more answers
HELP PLSSSSSSSSSS
Nat2105 [25]

Answer:

ask your mom

Explanation:

copy this \pink{ \rule{999pt}{999999pt}}

and the result is here

btw if you want to change color change the \pink (if you want?)

\red{ \rule{999pt}{999999pt}}

8 0
2 years ago
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