1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nezavi [6.7K]
3 years ago
13

Nuclear decay27Al + He 》 39P​

Chemistry
1 answer:
dybincka [34]3 years ago
6 0

Answer:

_{13}^{27}\text{Al} + \rm _{2}^{4}\text{He} \longrightarrow \, _{15}^{31}\text{P}

Explanation:

The unbalanced nuclear equation is

^{27}\text{Al} + \rm \text{He} \longrightarrow \, ^{31}\text{P}

We can insert the subscripts, because these are the atomic numbers of the elements

_{13}^{27}\text{Al} + \, \rm _{2}\text{He} \longrightarrow \, _{15}^{31}\text{P}

That leaves only the superscript of He to be determined,

The main point to remember in balancing nuclear equations is that the sums of the superscripts must be the same on each side of the equation.  

Then

27 + x = 31, so x = 31 - 27 = 4

Then, your nuclear equation becomes

_{13}^{27}\text{Al} + \, \rm _{2}^{4}\text{He} \longrightarrow \, _{15}^{31}\text{P}

You might be interested in
#1: Jim, Jane, Ann, and Bill measure an object’s length, density, mass, and volume, respectively. Which student’s measurement mi
STatiana [176]
1. The <span>student with a measurement that might be in centimeters is A. Bill.
2. C</span><span>entimeters  in 0.05 kilometers is </span>C. 5,000
solution:
0.05 km x (1000 meters/ 1 km)
= 50 meters x (100 cm/ 1 meter) 
=5000 cm
7 0
3 years ago
Read 2 more answers
(12) Magnesium metal burns very brightly to produce heat and a white solid.
hjlf

Answer:

exothermic

Explanation:

heat/energy is released when it burns.

5 0
3 years ago
Complete and balance the following double replacement reaction: CdCl2 + H2S --&gt;
Vanyuwa [196]
CdCl2+H2S--> CdS+HCl 



6 0
3 years ago
Whats the answer to #11
morpeh [17]

Well, one mole would be considered as 6.02 x 1023 (atoms). Which in the copper form, this would be considered to be as 63.66 grams of copper. Know, by knowing this information, we're now able to figured out the question.

53.3 ÷ (atoms) 6.02 x 1023 ...

Which as a result, we then have 2665 over.

8 0
3 years ago
What is the coldest element
ser-zykov [4K]

Answer:

Liquid helium

Explanation:

Liquid helium is known to be the coldest element in the world.

It has a ridiculous boiling point of -452 degrees

It is considered the only element on earth that does not freeze to become solid. normally, it is usually in a form of cryogenic fluid or superfluid.

Hence, the coldest element is known as LIQUID HELIUM

6 0
3 years ago
Other questions:
  • Which sample contains the largest number of molecules?
    6·1 answer
  • When placed in a 100 mL cube-shaped box, a substance fills the cube and has a volume of 100 mL. When placed in a 50 mL tube, tha
    10·1 answer
  • When a 13.0g sample of NaOH(s) dissolves in 400.0 mL water in a coffee cup calorimeter, the temperature of the water changes fro
    11·1 answer
  • A student did an experiment on the cycling of environmental gases. She placed water and bromthymol blue in each of four test tub
    15·1 answer
  • 12. A heterogeneous mixture is a
    10·1 answer
  • ASAP
    9·1 answer
  • Why do non-metals and metals do not conduct electricity
    8·1 answer
  • All of the following are cofactors used in the reaction catalyzed by pyruvate dehydrogenase EXCEPT ________.A. NAD+B. Thiamine p
    7·1 answer
  • How many Calcium (CA) atoms are in carbon tetrachloride​
    9·2 answers
  • Why do men<br> thats it that’s the question
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!