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OlgaM077 [116]
4 years ago
7

Which of the following is NOT a branch of chemistry? *

Chemistry
2 answers:
ICE Princess25 [194]4 years ago
8 0

Answer:

Mechanical Chemistry isn't a branch of Chemistry.

Leokris [45]4 years ago
6 0

Mechanical because the 11 branches of chemistry are , Analytical chemistry, Biochemistry, Electrochemistry, Environmental,  Inorganic chemistry, Organic chemistry, Physical Chemistry, Polymer chemistry Thermochemistry, Theoretical chemistry, and Lastly Chemistry.

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What will happen if there is an insufficient supply of oxygen during the combustion of a hydrocarbon?
Kamila [148]
As long as there is some oxygen, the reaction will occur. If there is an insufficient amount of oxygen, then the oxygen will be the limiting reacting and there will be excess of the other reactants. 
8 0
4 years ago
What is the original mass of the iron wool?
Aliun [14]

Answer:

it is 55.84

Explanation:

it's 55.84 because that is the relative atomic mass of iron and iron is the formula for iron wool

3 0
3 years ago
Read 2 more answers
How many grams of NO are required to produce 121.0 g of N2 in the following reaction? Show all your work4NH3(8) + 6NO(g) → 5N2(g
elena-s [515]

Explanation:

First, let's rewrite the equation here:

4 NH3 + 6 NO -> 5 N2 + 6 H2O.

The equation tells us that 6 moles of NO produces 5 moles of N2.

But the question wants us to find the quantity in grams of NO required if we have 121 g of N2.

1. So first, let's transform 121 g of N2 into moles, using its molar mass (28 g/mol) and the following formula: moles = mass/molar mass

2. Then, we use the equation ratio between NO and N2: 6:5.

3. Then we transform the result into grams of NO, using its molar mass (30.01 g/mol) and the following formula: mass = moles*molar mass

1. moles = 121/28

moles = 4.3 moles of N2

2. 6 moles of NO --- 5 moles of N2

x moles of NO --- 4.3 moles of N2

5x = 4.3*6

x = 25.9/5

x = 5.2 moles of NO

3. mass = 5.2*30.01

mass = 155.6 g

Answer: It will require 155.6 g of NO.

7 0
2 years ago
What is your opinion on Mercury element
elixir [45]

Answer:

Mercury is an liquid metal

Explanation:

Mercury is a chemical element with the symbol Hg and atomic number 80. It is commonly known as quicksilver and was formerly named hydrargyrum.

Symbol: Hg

7 0
3 years ago
When 1.5 mol calcium nitrate dissolves in water, how many moles of ions should be present in solution?
____ [38]

Answer:

1.5 moles of Ca²⁺ and 3 moles of NO₃⁻

Explanation:

This is the dissociation:

Ca(NO₃)₂  →  Ca²⁺  +  2NO₃⁻

1.5 moles of salt will have the same moles of ion Ca²⁺ and the double of moles, of nitrate according to the equation.

Therefore will be 1.5 moles of Ca²⁺ and 3 moles of NO₃⁻

5 0
3 years ago
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