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tester [92]
3 years ago
13

How do chemical reactions, such as burning, differ from physical changes, such as melting and other phase changes?

Chemistry
1 answer:
IrinaVladis [17]3 years ago
5 0

Answer:

How to differentiate between physical and chemical change?

Physical and Chemical Changes to Matter

Physical changes only change the appearance of a substance, not its chemical composition.

Chemical changes cause a substance to change into an entire substance with a new chemical formula.

Chemical changes are also known as chemical reactions.

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What superhero gained his powers by becoming a transgenic organism?
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Answer:

B.spiderman

Explanation:

DNA has been transferred to another species. Spiderman became Spiderman when DNA from a spider combined with a human.

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2 years ago
Friction is generated when _____ interfere with each other on sliding surfaces. solids molecules forces fluids
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Friction is generated when sliding
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3 years ago
What are the periodic trends of ionic radii? Check all that apply.
Troyanec [42]
Atomic radii increase when going down a group and decreases when going towards the anion periods. So A and D.
6 0
3 years ago
Read 2 more answers
The rotational period of the moon is_____
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6 0
3 years ago
A 8.65-L container holds a mixture of two gases at 11 °C. The partial pressures of gas A and gas B, respectively, are 0.205 atm
Vsevolod [243]

 The  total pressure  = 1.402 atm


<u><em>calculation</em></u>

Total  pressure = partial  pressure  of gas A + partial pressure of gas B +  partial pressure  of third gas

partial  pressure  of gas A= 0.205 atm

Partial pressure of gas B =0.658 atm


partial pressure for third gas is calculated using ideal  gas equation

that is PV=nRT   where,

p(pressure)=? atm

V(volume) = 8.65 L

n(moles)= 0.200 moles

R(gas constant)=0.0821 L.atm/mol.k

T(temperature) = 11°c into kelvin =11+273 =284 k

make  p the subject of the formula by  diving both side by V

p =nRT/v


p = [(0.200 moles x 0.0821 L.atm/mol.K x 284 K)/8.65L)] =0.539 atm



Total  pressure  is therefore = 0.205 atm +0.658 atm +0.539 atm

=1.402 atm

6 0
3 years ago
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