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3 years ago

Elements with atomic numbers above 95 are called what elements

Chemistry

1 answer:

Anastasy [175]3 years ago

8 0

If you mean 92. Anything with an atomic number greater than 92 is called transuranic. <span>
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What does a velocity measurement include that a speed measurement does not?

Mars2501 [29]

Velocity is speed and Direction. It does not include direction

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3 years ago

Calculate the number-average molecular weight for a poly(vinyl chloride) for which the degree of polymerization is 21500.

bezimeni [28]

Answer:

The number-average molecular weight for a poly(vinyl chloride) is 1,343,750 g/mol.

Explanation:

Molecular weight of the poly(vinyl chloride), $CH_2=CHCl =M=62.5 g/mol$

Number average molecular weight of the polymer = M_a

Degree of polymerization = n = 21500

$\frac{M_a}{M}=n$

$M_a=n\times m=21500\times 62.5 g/mol=1,343,750 g/mol$

The number-average molecular weight for a poly(vinyl chloride) is 1,343,750 g/mol.

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4 years ago

What is the velocity of a plane traveling west if it flies 1575 km in 2.75 hours

dalvyx [7]

Answer:

572.72kmh (after decimal is repeating)

Explanation:

1575/2.75

8 0

3 years ago

A chemistry student adds a quantity of an unknown solid compound X to 750. mL of distilled water at 26.° C. After 10 minutes of

Anna11 [10]

Explanation:

The given data is as follows.

X = 12 g, Volume of water = 2 L,

Hence, solubility will be calculated as follows.

$\frac{12 g}{2 L}$

= 6 g/L

As we know that 1 L contains 1000 ml. Hence, the calculated solubility will be converted into g/ml as follows.

Solubility = $\frac{6 g}{1000 ml}$

= 0.006 g/ml

Thus, we can conclude that the solubility of compound X in $26^{o}C$ is 0.006 g/ml.

7 0

3 years ago

What is the difference between Ionization energy and Electron Affinity?

katrin2010 [14]

Ionization energy is the amount of energy required to remove the electron that is most loosely bound of an isolated gaseous atom to form a cation.

Electron affinity is the amount of energy released when an electron is added to a neutral atom or a molecule in a gaseous state to form negation ion.

The difference of ionization energy and electron affinity is ionization energy is the required energy to remove an electron from a neutral atom. Whereas, electron affinity is the energy change when a neutral atom attracts an electron to become a negative ion.

5 0

3 years ago