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schepotkina [342]
3 years ago
8

The formula C2H4 can be classified as

Chemistry
2 answers:
blsea [12.9K]3 years ago
7 0

The formula C2H4 can be classified as both a molecular formula and an empirical formula. The answer is number 4.

kicyunya [14]3 years ago
4 0
It is a molecular formula for ethene and an empirical formula for an organic compound higher than it by -CH2.
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A chemist prepares hydrogen fluoride by means of the following reaction:
natita [175]

Answer:

39.3%

Explanation:

CaF2 + H2SO4 --> CaSO4 + 2HF

We must first determine the limiting reactant, the limiting reactant is the reactant that yields the least number of moles of products. The question explicitly says that H2SO4 is in excess so CaF2 is the limiting reactant hence:

For CaF2;

Number of moles reacted= mass/molar mass

Molar mass of CaF2= 78.07 g/mol

Number of moles reacted= 11g/78.07 g/mol = 0.14 moles of Calcium flouride

Since 1 mole of calcium fluoride yields two moles of 2 moles hydrogen fluoride

0.14 moles of calcium fluoride will yield 0.14×2= 0.28 moles of hydrogen fluoride

Mass of hydrogen fluoride formed (theoretical yield) = number of moles× molar mass

Molar mass of hydrogen fluoride= 20.01 g/mol

Mass of HF= 0.28 moles × 20.01 g/mol= 5.6 g ( theoretical yield of HF)

Actual yield of HF was given in the question as 2.2g

% yield of HF= actual yield/ theoretical yield ×100

%yield of HF= 2.2/5.6 ×100

% yield of HF= 39.3%

4 0
3 years ago
Which of the following are interactions between particles in a liquid?
Artemon [7]
Can you pick more than one?
8 0
3 years ago
Balance the equation below<br> Fe,<br> Fe+<br> 02
Katena32 [7]
2 Fe2O5-> 4 Fe+ 5 O2
5 0
2 years ago
What is an element?
s2008m [1.1K]
D -a substance made of more than one type of atom
5 0
3 years ago
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Which of the following is a chemical property of a base?
juin [17]

Answer:

D) forms hydronium ions in water

Explanation:

Texture and conductivity are physical properties which makes answer A and B wrong. Answer C does not refer to a chemical reaction.

4 0
3 years ago
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