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Juliette [100K]
2 years ago
6

Help please with this tough question

Chemistry
1 answer:
Alla [95]2 years ago
5 0

Answer:

  1. option B
  2. option A

Explanation:

please mark me as brainliest ❤️

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How is water important to many branches of science?
riadik2000 [5.3K]

Answer:

Water is capable of dissolving a variety of different substances, which is why it is such a good solvent. And, water is called the "universal solvent" because it dissolves more substances than any other liquid. This is important to every living thing on earth.

4 0
2 years ago
Which products are formed when aluminum is added to a silver chloride solution? none only AlCl3 AlCl3 and Ag AlAg3 and Cl2
anyanavicka [17]
The answer is "<span>AlCl3 and Ag".
 </span>
The reaction of aluminum and silver chloride is a single substitution type of reaction that is expressed as follows: Al (s) + 3AgCl (aq) = AlCl3 (aq) + 3Ag (s)When aluminium is added to silver chloride solution, the cations are exchanged in the process forming AlCl3 and Ag. 
4 0
2 years ago
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The empirical formula of pyrogallol is C2H2O. Its molar mass is 126 g mol-1. What is the molecular formula?C4H4O2C2H6O3C6H6O3C2H
VARVARA [1.3K]

Answer:

The molecular formula of pyrogallol is: C6H6O3

Explanation:

<u>Step 1:</u> Data given

Empirical formula of pyrogallol is C2H2O

Molar mass of pyrogallol = 126 g/mol

Molar mass of Carbon (C) = 12 g/mol

Molar mass of hydrogen (H) = 1.01 g/mol

Molar mass of oxygen (O) = 16 g/mol

<u>Step 2:</u> Calculate molar mass of the empirical formula

2*12 + 2*1+ 16 = 42 g/mol

<u>Step 3: </u>Calculate the molecular formula

To find the molecular formule , we should multiply the empirical formula by n

n can be found by dividing molar mass of pyrogallol by the molar mass of the empirical formula

n = 126 g/mol / 42 g/mol ≈ 3

We should mulitply the empirica lformula by 3

3*(C2H2O) gives C6H6O3

if we calculate the molar mass now:

6*12 +6*1 + 3*16 = 126 g/mol

The molecular formula of pyrogallol is: C6H6O3

6 0
2 years ago
A pond has the dimensions of 25 meters long by 20 meters wide. If there are 100 frogs living in the pond, what is the "populatio
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D. 5 frogs/sq meter

Explanation:

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2 years ago
6. A sheet of metal is 2 cm wide, 10 cm tall, and 15 cm long. It was 4 grams. What is the
Flauer [41]

Answer:

0.013g/cm^3

Explanation:

density= mass÷volume

8 0
3 years ago
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