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Rufina [12.5K]
3 years ago
13

An atom of element Be has four protons, four electrons, and five neutrons. Which element below could be an isotope of this atom?

Sodium-10 beryllium-10 boron-9 carbon-9
Chemistry
2 answers:
geniusboy [140]3 years ago
7 0

Answer:

beryllium 10

took the quiz on edg2020

Explanation:

FrozenT [24]3 years ago
4 0

Answer:

beryllium-10

Explanation:

An isotope is an atom <u>of the same element</u> that has a different number of neutrons.

This means that an isotope of beryllium (Be) would have to be beryllium as well.

The number 10 references the fact that it has four protons and <u>six </u>neutrons:

4 protons + 6 neutrons = 10

While usually the element has 5 neutrons, so it is beryllium-9.

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B would be correct if it had another carbon.

A is like C but incorrect for the same reason. 1,2-dibromoethane is what A is.

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Which of the following would be classified as an acid to the Arrhenius definition
mixer [17]

Any substance that increases the concentration of H^+ in aqueous solutions is Arrhenius's acid.

<h3>What are Arrhenius acids?</h3>

Arrhenius define acids as substances with the chemical capacities to increase the concentration of hydrogen ion in aqueous solutions.

Thus, substances like HCl, HNO3, HBr, etc. would be considered an acid. This is because they ionize in aqueous solutions as follows:

HCl ---> H^+ + Cl^-

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More on Arrhenius acids can be found here: brainly.com/question/9936252

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Show your calculation by uploading a picture. Calculate the molar mass of ammonia, NH3
Cloud [144]

Answer:

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Explanation:

Molar Mass of NH₃

we know that

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And Hydrogen has 1.01 gram/mol

but we have 3 Hydrogens So we multiply

1.01 by 3 i.e., 3.03

Now, add

14.01

+<u> </u><u>3</u><u>.</u><u>0</u><u>3</u>

17.04

So, The molar mass of ammonia, NH₃ is

17.04 g/mol

<u>-TheUnknown</u><u>Scientist</u>

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