. What polymer is produced when Ethene is polymerised with Fluorine?

Chemistry

1 answer:

Orlov [11]3 years ago

4 0

Answer: Polytetrafluoroethylene (e.g., Teflon)

Explanation: This is a multistep process. Tetrafluoroethylene (TFE) is first produced, followed by a polymerization reaction to form the PTFE.

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If the half-life of an element is 150 years, how much of a 400 gram sample would remain in 750 years?

photoshop1234 [79]

Answer:

Explanation:

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3 years ago

Pizza is an example of a homogeneous mixture.

Kay [80]

No its a example of heterogeneous mixture

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4 years ago

Consider the balanced reaction: 4Ga(s) + 3O2(g)⟶ 2Ga2O3(s)

Paha777 [63]

First we need to find the number of moles that 43.9g of gallium metal is. We can do this by finding the molar weight of gallium and cross-multiplying to cancel out units:

$\frac{1mole}{69.723g}*\frac{43.9g}{1}=0.63mol_{Ga}$

So we are dealing with 0.63 moles of gallium metal.

We can take from the balanced equation that 4 moles of gallium metal will react completely with 3 moles of oxygen gas. We can take this ratio and make a proportion to find the amount of oxygen gas, in moles, that will react completely with 0.63 moles of gallium metal:

$\frac{4moles_{Ga}}{3moles_{O_{2}}} =\frac{0.63moles_{Ga}}{xmoles_{O_{2}}}$

Cross multiply and solve for x:

$4x=1.89$

$x=0.47moles_{O{2}}$

So now we know that 0.47 moles of oxygen gas will react with 43.9g of gallium metal.

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3 years ago

A pure substance that contains more than one atom is called a(n)...

gladu [14]

Answer:

A pure substance that contains more than one atom is called a compound.

Explanation:

Compounds are formed by combination of atoms by a fixed ratio. They have their own characteristic features.
Pure substances are further broken down into elements and compounds. A compound can be destroyed by chemical means. It might be broken down into simpler compounds, into its elements or a combination of the two.

Example