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Sphinxa [80]
3 years ago
15

The particles that make up matter do not change during a ?

Chemistry
2 answers:
Bogdan [553]3 years ago
8 0
Matter can only me transformed, but not created or destroyed.
S_A_V [24]3 years ago
6 0
Matter can't be destroyed nor created but only transferred.
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Fynjy0 [20]
It is a true statement
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3 years ago
Which of the following sets of empirical formula, molar mass, and molecular formula is correct?
lutik1710 [3]

Answer:

CH4N, 90g, C3H12N3

Explanation:

3 0
3 years ago
An element has two naturally occurring isotopes, X-85 with a mass of 84.9118 amu and a natural abundance of 72.17%, and X-87 wit
QveST [7]

Answer:

This element is Rubidium (Rb) and has an average atomic mass of 85.468 u

Explanation:

The average mass of an element is calculated by taking the average of the atomic masses of its stable isotopes.

The enitre atomic mass = 100 % or 1

⇒ this consists of X-85 with 72.17 % abundance  with atomic massof  84.9118 g/mol

72.17 % = 0.7217

⇒ this consists of X-87 with  27.83 % abundance with atomic mass of 86.9092 g/mol

27.83 % = 0.2783

To calculate the mass of this isotope we use the following:

0.7271 * 84.9118 + 0.2783 * 86.9092 =85.468 g/mol

This element is Rubidium(Rb) and has an average atomic mass of 85.468 u

5 0
3 years ago
What is the molar concentration of
Leto [7]

Answer:

1.42 M

Explanation:

First calculate the amount of moles.

that's done by dividing the mass with the molecular mass so 660g / 310.18 g/mol = 2.13 mol

Then you can calculate the molarity by dividing the moles with the volume so 2.13 mol / 1.5 l = 1.42 M

(without rounding: 1.418531175 M)

3 0
2 years ago
Vamos para playa oh te rajas lol
Anuta_ua [19.1K]

Answer:

let's go to the beach or u will relax lol

6 0
3 years ago
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