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3 years ago

A three-carbon alkene contains two double bonds. Predict its molecular formula? A) C3H4 B) C3H5 C) C3H6

Chemistry

2 answers:

Vilka [71]3 years ago

6 0

Answer:

A) C3H4

Explanation:

We have to remember that for each carbon we must have 4 bonds. In a three-carbon alkene we will have 2 bonds for the left carbon, 4 bonds for the central carbon and 2 bonds for the right carbon (Figure 1). Therefore we have to add 2 hydrogens in the left carbon and 2 hydrogens for the right carbon. Finally, if we count the number of carbons and hydrogens we will get C3H4.

anyanavicka [17]3 years ago

5 0

A three-carbon alkene contains two double bonds. My prediction of its molecular formula is A. C3H4.

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3 years ago

How many moles of O₂ are needed to react completely with 35.0 mol of FeCl₃? *

densk [106]

Answer:

26.3 moles of O₂ are needed to react completely with 35.0 mol of FeCl₃

Explanation:

To determine the number of moles of O₂ that are needed to react completely with 35.0 mol of FeCl₃, it is possible to use the reaction stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), and rule of three as follows: if 4 moles of FeCl₃ react with 3 moles of O₂, 35 moles of FeCl₃ with how many moles of O₂ will it react?

$molesofO_{2} =\frac{35 moles of FeCl_{3}*3 moles of O_{2} }{4 moles of FeCl_{3}}$

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2 years ago

Gravitational Potential Energy is created when an object’s what changes

alisha [4.7K]

Answer:

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2 years ago

The mass percent of solute in a solution containing 3.73 g KBr dissolved in 131 g of H2O is:

Elina [12.6K]

$\huge \underbrace \mathfrak \red{Answer}$

28%

Explanation:

mass of solute(KBr) = 3.73g

mass of solvent(H2O) = 131g

mass of solution = mass of solute + mass of solvent

= 3.73 + 131

= 134.73g

$\sf \large {mass \: percentage = \frac{mass \: of \: solute}{mass \: of \: solvent} \times 100} \\ \\ \sf mass \: percentage = \frac{3.73}{134.73} \times 100 \\ \\ \sf mass \: percentage = 0.028 \times 100 \\ \\ \sf mass \: percentage = 28\%$

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2 years ago

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8_murik_8 [283]

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2 years ago