3 years ago

What are cathode rays

Chemistry

1 answer:

Llana [10]3 years ago

4 0

Answer:

a beam of electrons emitted from the cathode of a high-vacuum tube.

Explanation:

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melting, boiling, and bending are considered physical changes, but burning is a chemical change. explain why this is so.

Naya [18.7K]

<span>So, when you make something boiling or melting, its still the same substance. Water doesn't change into something else, just change its state of matter. When you burn something, one substance reacts with another. For example, when you burn carbon in oxygen, you get carbon dioxide. That's the difference.</span>

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3 years ago

As a technician in a large pharmaceutical research firm, you need to produce 300. mL of 1.00 M a phosphate buffer solution of pH

tamaranim1 [39]

Answer: pH = 7.36. The pKa of H2PO4− is 7.21.

Explanation:

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3 years ago

In a short paragraph, describe how I fuel cell works.

nirvana33 [79]

Explanation:

passing hydrogen through the anode of a fuel cell and oxygen through the cathode.

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2 years ago

Predict the initial and isolated products for the reaction. The starting material is a 6 carbon chain where there is a triple bo

satela [25.4K]

Answer:

See explanation and image attached

Explanation:

This reaction is known as mercuric ion catalyzed hydration of alkynes.

The first step in the reaction is attack of the mercuric ion on the carbon-carbon triple bond, a bridged intermediate is formed. This bridged intermediate is attacked by water molecule to give an organomercury enol. This undergoes keto-enol tautomerism, proton transfer to the keto group yields an oxonium ion, loss of the mercuric ion now gives equilibrium keto and enol forms of the compound. The keto form is favoured over the enol form.

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3 years ago

Which of the following statements about tolerance range is true?

vovikov84 [41]

A. Tolerance range is different for different organisms.

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3 years ago