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2 years ago

What is CaF2(aq) + Rb

Chemistry

1 answer:

NNADVOKAT [17]2 years ago

7 0

Answer:

RbF2 + Ca

Explanation:

Since Rb is located in IIA as well as Ca, Rb has ion form Rb2+

Hence CaF2 + Rb → RbF2 +Ca

Please be reminded, this answer may not be 100% correct

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Which is a key element found in all carbohydrates, lipids, proteins, and nucleic acids?

klemol [59]

Carbon because they all have CHO in the chemical equations

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2 years ago

What is 2.57 g/cm = ? kg/L ?

shepuryov [24]

Answer: 2.7kg/L

Explanation:

1 gram per cubic centimeter g/cm3= 1.00 kilograms per liter kg/l

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2 years ago

Question 1(Multiple Choice Worth 4 points) (02.03 LC) A scientist studied four rock fossils that show evolution of the modern-da

ASHA 777 [7]

Answer:

The correct answer is 1 millon years.

Explanation:

Fossil rocks serve to study the evolution of species throughout history. Species usually adapt to survive the changing environment around them. Given this fact, we can deduce that the oldest species were very different from the way they are today. This means that the current species are more similar to those that preceded them more recently. The fossil of 1 million years ago is the most similar to today's horse.

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2 years ago

What happens to isotopes that are unstable?

Lesechka [4]

<u>Explanation:</u>

Isotopes are defined as the chemical species of the same element which differs in the number of neutrons. The isotopes which are unstable are known as radioactive isotope. A radioactive (unstable )isotope can undergo 3 decay process:

1. Alpha Decay: In this decay process, a larger nuclei decays into smaller nuclei by releasing alpha particle. The particle released has a charge of +2 and a mass of 4 units.

$_Z^A\textrm{X}\rightarrow _{Z-2}^{A-4}Y+_2^4\alpha$

2. Beta-minus decay: In this decay process, a neutron gets converted into a proton and an electron. the particle released during this process is a beta-particle.

$_Z^A\textrm{X}\rightarrow _{Z+1}^A\textrm{Y}+_{-1}^0\beta$

3. Beta-plus decay: In this decay process, a protons gets converted into a neutron and electron-neutrino particle. The particle released during this process is a positron particle.

$_Z^A\textrm{X}\rightarrow _{Z-1}^A\textrm{Y}+_{+1}^0\beta$

Isotopes which are unstable in nature can undergo these 3 decay processes.

5 0

2 years ago

How many electrons does the isotope helium-5 have

baherus [9]

Answer:

two electrons.

Explanation:

Helium-5, like all other helium isotopes, has two protons and two electrons. Its different from the others in the fact that it has three neutrons. It is one of the unstable isotopes, having a half-life of significantly less than a picosecond (a trillionth of a second). your welcome!!

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2 years ago