All categories

3 years ago

22486Rn → _________ + 42He

Chemistry

1 answer:

Usimov [2.4K]3 years ago

8 0

Answer:

₈₄Po²²⁰

Explanation:

₈₆Rn²²⁴ → ₈₄Po²²⁰ + ₂He⁴

In given decay reaction alpha particle is emitted from Radon.

Alpha radiations:

Alpha radiations are emitted as a result of radioactive decay. The atom emit the alpha particles consist of two proton and two neutrons. Which is also called helium nuclei. When atom undergoes the alpha emission the original atom convert into the atom having mass number 4 less than and atomic number 2 less than the starting atom.

Alpha radiations can travel in a short distance.

These radiations can not penetrate into the skin or clothes.

These radiations can be harmful for the human if these are inhaled.

These radiations can be stopped by a piece of paper.

You might be interested in

How is salt water classified?

docker41 [41]

Salt water is considered a compound since water is H20 (conpound) and Salt with is NaCl.

4 0

4 years ago

1. What does the -ite or -ate ending in a polyatomic ion mean?

den301095 [7]

Question 1 im pretty sure it is a. oxygen is in the formula.
question 2 is b. dinitrogen pentoxide

3 0

3 years ago

How the fossil evidence helped you put the landmasses together (what was your process)

Otrada [13]

Explanation:

The idea behind using fossils to correlate two land masses was first put into limelight by a British geologist, Williams Smith.

According to the principle of fossil and fauna succession "fossils and fauna succeed one another in a define order".

This implies organisms evolve in predictable manner.

Since we know that certain types of organisms live within a period in time on the earth surface, we expect that such organisms would be fossilized in the geologic record and preserved.

Identify the fossil record in one part of the land mass. Log the rock types with the corresponding fossils in them.
On the other side, repeat the same process.
Look for unconformity surfaces where some part of the stratigraphic records might have been lost.
If the fossil records on one side corresponds with that on the other other side, it suggests that the land masses must have once been joined together.
The logic is that when the organism were on the same land mass, they thrived and lived together.
They became fossilized together till the lands separated.

learn more:

fossils brainly.com/question/9415077

#learnwithBrainly

4 0

3 years ago

If 5.4 moles of Fe react with 4.7 moles of O2, what is the maximum amount of Fe2O3 (in moles) that can be produced? What is the

DIA [1.3K]

Answer:

2.7 moles of Fe₂O₃ is the maximum amount that can be produced. Iron is the limiting reactant.

Explanation:

The balanced reaction is:

4 Fe + 3 O₂ → 2 Fe₂O₃

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate in the reaction:

Fe: 4 moles
O₂: 3 moles
Fe₂O3: 2 moles

The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.

You can use a simple rule of three as follows: if by stoichiometry 4 moles of Fe reacts with 3 moles of O₂, how much moles of Fe will be needed if 4.7 moles of O₂ react?

$moles of Fe =\frac{4. moles of Fe*4.7 moles of O_{2}}{3 moles of O_{2} }$

moles of O₂= 6.27

But 6.27 moles of Fe are not available, 5.4 moles are available. Since you have less moles than you need to react with 4.7 moles of O₂, iron Fe will be the limiting reagent.

So you can use a simple rule of three as follows: if by stoichiometry 4 moles of Fe produce 2 moles of Fe₂O₃, how many moles of Fe₂O₃ will be produced if 5.4 moles of Fe react?

$moles of Fe_{2}O_{3}=\frac{5.4 moles of Fe*2 moles of Fe_{2} O_{3} }{4 moles of Fe}$

moles of Fe₂O₃= 2.7 moles

Then:

2.7 moles of Fe₂O₃ is the maximum amount that can be produced. Iron is the limiting reactant.

4 0

3 years ago

According to the periodic table, lithium and nitrogen have the same number of

Vaselesa [24]

Lithium and nitrogen have the same electron energy levels, actually 2 levels.

6 0

3 years ago

Read 2 more answers