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2 years ago

98 POINTS!!! WILL AWARD BRAINLIST!! EXTRA POINTS!! PLS HELP!!

Chemistry

2 answers:

BabaBlast [244]2 years ago

4 0

Answers are at the pdf.

Since there are 16 questions, all answers cannot be uploaded because number of characters is beyond the limit.

Download pdf

DanielleElmas [232]2 years ago

4 0

I'm pretty sure the answer to the first question is B, i think

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La valencia que utiliza el hidrógeno al formar un hidruro metálico es

Serjik [45]

Answer: Esta tendencia es tan regular que el poder de combinación, o valencia, de un elemento se definió una vez como el número de átomos de hidrógeno unidos al elemento en su hidruro. El hidrógeno es el único elemento que forma compuestos en los que los electrones de valencia están en la capa n = 1.

Explanation:

¡Espero que esto ayude!

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2 years ago

What type of cryptography uses two keys instead of just one, generating both a private and a public key?

Alexxx [7]

Answer:

It is known as asymmetric key cryptography it is also called public key cryptography.

Explanation:

Asymmetric key cryptography method makes use of two keys.One is used for encryption and the second one for decryption. The public key serves to encrypt plain text or verify a digital signature, while the private key is used to decrypt or decipher the encrypted text or to create a digital signature.

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2 years ago

Write the atomic symbol for the isotope of bismuth with 125 neutrons.

vlada-n [284]

First, isotopes are the atoms of a single element whose nuclei have a different number of neutrons, and therefore, differ in mass numbers. You should know that atoms are formed by a nucleus that has a small size and is made up of protons and neutrons. The nucleus is surrounded by a cloud of electrons, which are found in a region of the atom called the cortex.

The mass number, represented as A, is the sum of the number of protons and neutrons in the nucleus. On the other hand, the atomic number (Z) is the number of protons that exist in the nucleus.

The isotopes of an element X are represented as follows,

(see first attached picture)

It should be noted that the number of neutrons of a chemical element can be calculated as the difference A-Z.

The atomic and mass numbers of bismuth with 125 neutrons are:

Z = 83

A = 83 + 125 = 208

Thus, the atomic symbol of the bismuth isotope with 125 neutrons is:

(see second attached picture)

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2 years ago

Using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective sub

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Sodium chloride because it contains the most reactive metal(sodium) and most reactive non-metal(chlorine).

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2 years ago

Find the molar mass of s6

Mrrafil [7]

Moles: 1

Weight, g : 192.3900

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2 years ago

Read 2 more answers