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Jlenok [28]
3 years ago
7

2 main reasons why we have seasons.

Chemistry
1 answer:
Ket [755]3 years ago
3 0

Answer:

Tilt of a planet's axis and its orbit around the sun.

Explanation:

hope this helps! :)

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Displacement reaction between copper and silver nitrate solution produces silver and copper (II) nitrate solution. Write the che
xxMikexx [17]

Answer:

Cu   +   2AgNO₃    →   2Ag   +  Cu(NO₃)₂

Explanation:

We are to give the reaction expression for this displacement reaction.

 Reactants  = copper and silver nitrate solution

 Products  = silver and copper (II) nitrate

Copper  = Cu

 Silver nitrate solution  = AgNO₃  

Silver  = Ag

copper (II) nitrate  = Cu(NO₃) ₂

So:

         Cu   +   2AgNO₃    →   2Ag   +  Cu(NO₃)₂

3 0
3 years ago
What is another name for a condensation reaction? what is another name for a condensation reaction? water formation catabolism d
gregori [183]
Condensation is a chemical reaction in which two molecules are combined together and as a product formed a large molecule. There is also loss of small molecules in the condensation reaction. And mostly the functional groups combined in the reaction.
The other name for a condensation reaction is dehydration. As there is loss of molecule in condensation reaction, when that molecule is water it is said to be dehydration.
3 0
4 years ago
Read 2 more answers
Which of the following statements about non-metal elements is true?
Troyanec [42]

Answer:Put pic

Explanation:we cant answer if theres no details(pictures)

3 0
3 years ago
on the periodic table, elements are arranged by which of the following. A. mass numbers. B. increasing atomic number. C. alphabe
Sever21 [200]

Its B. Increasing Atomic Number.


3 0
3 years ago
A 0.020 M solution of niacin has a pH of 3.26. (a) What percentage of the acid is ionized in this solution
mariarad [96]

Answer: 2.75%

Explanation:

pH=-log [H+]

3.26 = -log [H+]

[H+] = 5.495\times 10^{-4} M

HA\rightleftharpoons H^++A^-

initial      0.020     0           0

eqm        0.020 -x    x      x

K_a=\frac{[H+][A-]}{[HA]}

K_a=\frac{[x][x]}{[0.020-x]}

x=5.495\times 10^{-4}

K_a=\frac{[5.495\times 10^{-4}]^2}{[0.020-5.495\times 10^{-4}]}

K_a =1.553\times 10^{-5}

percent dissociation = \frac{[H^+_eqm]}{[Acid_{initial}]}\times 100

percent dissociation=\frac{5.495\times 10^{-4}}{0.020}\times 100

Thus percent dissociation= 2.75 %

5 0
3 years ago
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