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Goryan [66]
3 years ago
13

Why is rust forming on a car a chemical change?

Chemistry
1 answer:
aleksklad [387]3 years ago
5 0
By placing the steel wool in a jar with plenty of oxygen and water, you start a chemical reaction. The iron and the oxygen react to form a new reddish-brown substance, called iron oxide or rust.
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The combustion of propane may be described by the chemical equation, 
olasank [31]
\nu_{C_3H_8}=\frac{40.4}{\mu_{C_3H_8}}=
=\frac{40.4}{3A_C+8A_H}=\frac{40.4}{44}=
=\frac{9}{10}=0.9mol
1mol\ C_3H_8...5\ mol\ O_2 \\ 0.9mol\ C_3H_8...x\ mol\ O_2
x=\frac{0.9*5}{1}=4.5mol\ O_2
m=\mu_{O_2}*x=2*A_O*4.5=9*8=72g\ O_2
6 0
4 years ago
Select the correct answer.
Stels [109]
I would definitely say that the answer is

C. drought

because if they are getting 43.76 inches of rain on average, and then one year they decrease 10.31 inches of rain to 33.45 inches of rain, its a drought for sure.
7 0
3 years ago
Read 2 more answers
Đơn chất nào sau đây tác dụng với dung dịch axit sunfuric loãng sinh ra khí ?
viva [34]

Answer:

C. Al

Explanation:

2Al+ 3H2SO4(l)------> Al2(SO4)3+ 3H2

6 0
3 years ago
one beaker contains nacl and another sugar, describe an experiment you could conduct to find the contents
Morgarella [4.7K]

Explanation:

Hi! I don't know why I am not getting any brainliest answer and if you are kind enough could you please mark me as the brainliest answer and please follow me also.

4 0
3 years ago
Solutions with low pH values have which of these properties?
telo118 [61]

Answer:

The correct option is C.

Solutions with low pH values have sour taste.

Explanation:

Low pH value show acidic property which can be define as , -log of conc. of hydrogen ion.

Acid has following properties

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  • Turn blue litmus into red
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-OH group: Base have OH groups. So it is not correct option so it not correct for low pH i.e. acid

turns litmus paper blue: Base turn red litmus into blue, so it not correct for low pH i.e. acid

feels slippery: Bases are mostly slippery like soap

tastes sour: Sour taste is for acid and bitter taste is for base. So it is correct option for acid

8 0
4 years ago
Read 2 more answers
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