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AnnyKZ [126]
3 years ago
8

Question 4 of 10

Chemistry
1 answer:
SashulF [63]3 years ago
6 0
The answer is:

C) CuSO4.5H2O
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Write a balanced chemical equation for the reaction that occurs when silver (I) oxide decomposes into silver metal and oxygen ga
PolarNik [594]

Explanation:

The grey powder of silver ( I ) oxide i.e.  Ag₂O  breaks down to give a metal called the silver metal and an odorless , colorless gas , which is the oxygen gas .

The balanced chemical reaction is as follows -

Silver oxide ----->  Silver + oxygen

Ag₂O   ------>   Ag  (s)  +  O₂  (g)

The balanced reaction is -

2 Ag₂O (s)  ------>  4 Ag  (s)  +  O₂  (g)

8 0
3 years ago
Help please <br> Cu + S CuS
SCORPION-xisa [38]

Answer:

Hi.. U should do like this

Cu + S - - - >Cu2S

6 0
3 years ago
Boron has an atomic mass of 10.8 amu. It is known that naturally occurring boron is composed of two isotopes, boron-10 and boron
ANEK [815]
B-10 = 19.9%
B-11 = 80.1%

Abundance of B10 = x
Abundance of B11= y
You know x+y = 1 because there are only the 2 isotopes.
Y= 1-x

10.01294x + 11.00931 (1-x) = 10.811
10.01294x + 11.00931 - 11.00931x = 10.811 - 0.99016x = -0.198
X = 0.200

Check:
10.01294(0.2) + 11.00931 (0.8) = 10.81

20% B10. 80% B11
8 0
3 years ago
Read 2 more answers
Which one is one pkease?
matrenka [14]

\qquad\qquad\huge\underline{{\sf Answer}}

The Correct choice is D. Fe + S = FeS

because, in nature Iron (Fe) and Sulphur (S) are found in mono - Atomic form. so, There will be 1 Fe atom reacting with 1 S atom to form FeS (Iron sulphide)

8 0
2 years ago
What is the recommended way of preparing 100ml of 0.02 from 2M NaOH in the laboratory?
Hitman42 [59]

Answer:

Dilute 1 ml of 2M solution to 100 ml

Explanation:

C₁V₁=C₂V₂

V₁=C₂V₂/C₁=

=100×0.02/2=1ml

7 0
3 years ago
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