To obtain monochloroethane from ethylene, chlorine gas (Cl2) must be added. The reaction between ethylene and chlorine gas results in the substitution of one hydrogen atom in ethylene with a chlorine atom, forming monochloroethane. This reaction is known as chlorination and is commonly used in the production of various chloroalkanes. **

Monochloroethane cannot be formed in any of the reactions because it requires the substitution of two hydrogen atoms in ethane with chlorine atoms. The reactions provided only involve the addition of one chlorine atom to the ethane molecule, resulting in the formation of chloroethane. To form monochloroethane, a different reaction mechanism, such as free radical chlorination, would be needed to replace both hydrogen atoms with chlorine atoms. **

Yes, there are coin-operated vending machines in Flensburg. These machines can be found in various locations such as train stations, shopping centers, and public buildings. They offer a variety of products including snacks, drinks, and even everyday essentials like toiletries and phone chargers. Customers can use coins to make purchases from these vending machines. **

Monochloroethane cannot be formed in any of the reactions because it is a primary halogenoalkane, meaning that the carbon atom bonded to the halogen is only attached to one other carbon atom. In the reactions provided, the starting materials are either ethene or ethanol, both of which do not have a primary carbon atom bonded to the halogen. Therefore, monochloroethane cannot be formed as a product in these reactions. **

At the first coin-operated vending machine, which was created in the early 1880s by Percival Everett, customers could purchase postcards for their money. The machine was installed in the railway stations and post offices in London, and for a penny, customers could receive a postcard featuring a picture of the surrounding area. This early vending machine was a novelty at the time and provided customers with a convenient way to purchase postcards without the need for human interaction. **

The answer to this question depends on individual preferences and needs. A cashier-operated checkout provides the opportunity for human interaction and personalized service, which some people may prefer. On the other hand, a self-service store offers convenience and efficiency, allowing customers to complete their purchases quickly and without waiting in line. Ultimately, the better option is subjective and varies from person to person. **

Yes, there are coin-operated machines in Flensburg. These machines can be found in various locations such as laundromats, parking lots, and some public transportation stations. They are commonly used for services like laundry, parking, and vending machines. **

A coin-operated electricity meter works by allowing the user to insert coins into the meter in exchange for a certain amount of electricity. The meter measures the amount of electricity consumed and deducts the corresponding value from the coins inserted. Once the coins run out, the electricity supply is cut off until more coins are inserted. This type of meter is commonly used in situations where prepayment for electricity is required, such as in rental properties or temporary accommodations. **