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Usimov [2.4K]
4 years ago
14

Provide an appropriate alkyne starting material A and intermediate product B. Omit byproducts. The number of carbon atoms in the

starting material should be the same as in the final product.
Chemistry
1 answer:
nadezda [96]4 years ago
6 0

Answer:

C4H6 + 2HBr = C4H8Br2

Explanation:

Alkynes are organic molecules made of the functional group carbon-carbon triple bonds and are written in the empirical formula of CnH2n−2. They are unsaturated hydrocarbons.

Furthermore, Halogenation reaction of any alkyne such as but-2-yne with any of the hydro halogenated compounds such as HBr, HCl, HF or HI will give an alkane that will have the same number of carbon atoms in the starting material and in the final product.

Halogenation reaction is a reaction that occurs when one or more halogens are added to a substance. Halogens is the seventh column in the periodic table and it include fluorine, chlorine, bromine, iodine, and astatine.

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Research the future of energy production. What improvements to (or new methods of) electrical energy production are scientists c
Artyom0805 [142]

Answer:

Explanation:

There are many avenues of "current" research, so to spark.

  • Improved efficiency and lower-cost photovoltaic cells,
  • Improved, and lower cost, battery technology,
  • Systems for harnessing tidal and wave power from the oceans,
  • Molten salt energy storage for solar reflector arrays,
  • Hydrogen-powered motors for vehicles,
  • Gas storage (hydrogen) for transportation.
  • Energy storage systems such as flywheels, molten salts, hydro power, etc., and
  • Higher efficiency motors and electromagnetic devices
  • Replacement of fuel-powered motors with electrical motors in transportation, including vehicles, ships, and planes.

Finding less expensive, and non-toxic materials is important.  Less-enpense, and safer, alternatives to rare earth metals is sought.

7 0
2 years ago
The mole fraction of a non electrolyte (MM 101.1 g/mol) in an aqueous solution is 0.0194. The solution's density is 1.0627 g/mL.
yanalaym [24]

Answer:

Molarity for the solution is 1.05 mol/L

Explanation:

Mole fraction of solute = 0.0194

Solution's density = 1.0627 g/mL

We must know that sum of mole fraction = 1

Mole fraction of solute + Mole fraction of solvent = 1

0.0194 + Mole fraction of solvent = 1

Mole fraction of solvent = 1 - 0.0194 → 0.9806

Molarity is mol of solute in 1L of solution, so we have to determine solution's volume in L

With molar mass we can determine the mass of solute and solvent and then, the solution's mass

0.0194 mol . 101.1 g/ mol = 1.96 g of non electrolyte solute

0.9806 mol . 18 g/mol = 17.65 g of water

Mass of solution = mass of solute + mass of solvent

1.96 g + 17.65 g = 19.6 g (mass of solution)

Solution's density = Solution's mass / Solution's volume

1.0627 g/mL = 19.6 g / Solution's volume

Solution's volume = 19.6 g / 1.0627 g/mol →18.4 mL

Let's convert the mass from mL to L

18.4mL . 1L / 1000 mL = 0.0184 L

We have the moles of solute, so let's determine molarity

mol/L → 0.0194 mol / 0.0184 L =  1.05 M

8 0
3 years ago
An insoluble solid that forms from a chemical reaction is called a(n) _____.
serious [3.7K]
I believe that an insoluble solid that forms a chemical reaction is called a precipitate. 
Precipitate is an insoluble solid that forms when two ionic compounds in solution are combined. Which means precipitation reaction is the creation of a solid from a solution, and when the reaction occurs in a liquid solution, the solid formed is called the precipitate. In fact the only method of forming insoluble salts is called precipitation or double decomposition of salts.
4 0
3 years ago
What is conserved in physical changes
nataly862011 [7]

Answer:

energy or density

Explanation:

8 0
4 years ago
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Which of the following statements apply to an ionic bond?
PSYCHO15rus [73]

Answer:

the result is C and D. those are the ansers

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