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makkiz [27]
3 years ago
6

An atom of element X has an atomic number of 11 and a mass number of 23. .

Chemistry
2 answers:
Alex17521 [72]3 years ago
8 0

Answer:

ssaasasasassdsdsdafdftrga*b*y/a la 3

Explanation:

grin007 [14]3 years ago
3 0

Answer:

a) the number of protons in an atom

b) 11 protons, 11 electrons and 12 neutrons.

c) Isotope

d) yes, they still have the same number of protons and electrons.

Explanation:

b) Number of neutrons = mass number - atomic number

Atoms have the same number of electrons and protons

c) isotopes are atoms with the same number of  protons but a different number of neutrons.

Hope this helped !

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morpeh [17]

Answer:

Mass of liquid: 20.421g

Density= 1.0109405940594 g/mL

Explanation:

Mass of liquid

To find mass of liquid you take the mass of beaker + liquid (171.223g) and subtract it from the Mass of beaker (beaker without the water). The difference is the answer.

171.223g - 150.802g = 20.421g

Density

To find density you use the formula Mass/Volume. Take the Volume given, and the mass of the liquid you just found.

20.421mL/20.421g = 1.0109405940594 g/mL

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givi [52]

Answer:

a. CH3COO⁻.

Explanation:

Hello there!

In this case, according to the given ionization reaction of acetic acid:

CH₃COOH + H₂O --> H₃O⁺ + CH₃COO⁻

Whereas we can evidence how the CH₃COOH is the acid whereas H₂O the base, as the former donates H ions to the latter, which accepts them; we can infer that H₃O⁺ is the conjugate acid, resulting from the base and the a. CH3COO⁻ is the conjugate base, resulting from the acid.

Best regards!

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