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
lesantik [10]
3 years ago
12

Find the natural abundance of Si-30.

Chemistry
1 answer:
nataly862011 [7]3 years ago
5 0
<span> First you need to know how many isotopes there are of silicon, and its average atomic units (look at periodic table). Then make up a system of equations to solve for it. Theres 3 stable silicon isotopes (28, 29, 30) so you will need to have 3 equations. You must be given the percent abundance of at least one of the isotopes to solve because here I can only see 2 equations (numbered down below) set x = percent abundance of si-28 y = percent abundance of si-29 z = percent abundance of si-30 since all of silicon atoms account for 100% of all silicon: x + y + z = 100% = 1 therefore: 1) x = 1 - y - z You also have 2) 28x + 29y + 30z = average atomic mass you can substitute x so that equation becomes: 28 (1 - y - z) + 29y + 30z = average atomic mass See how you have 2 variables here? You cant go on until you know the value of one isotope already or you have given a clue which you can derive the third equation</span>
You might be interested in
It 32g of potassium nitrate can be dissolved in 1cm3 of water at 20oC before a saturated solution is obtained, how much potassiu
Dmitry_Shevchenko [17]

Answer:

160 gm

Explanation:

Five times as much water means you can dissolve 5 times as much potassium nitrate    5 x 32 = 160 gm  <u> <===== this seems unlikely though as I doubt 32 g  of  potassium nitrate will dissolve in only  1 cm^3 of water 1 cm^3 of water is only 1 gm of water </u>

7 0
1 year ago
Different between organic fertilizer and inorganic fertilizer ​
Svetradugi [14.3K]

Organic fertilizers are made from mined rock minerals, and natural plant and animal materials. They include ingredients like manure, guano, dried and powdered blood, ground bone, crushed shells, finely pulverized fish, phosphate rock, and wood.

Inorganic fertilizer is synthetic, comprised of minerals and synthetic chemicals. Most of the minerals in inorganic fertilizer are mined from the earth, and balanced inorganic fertilizers are high in all three macronutrients and can contain ammonium sulfate, magnesium sulfate, and potassium chloride.

mark me brainliesttt :))

5 0
2 years ago
Read 2 more answers
Which is an example of a mixture made of parts that can easily be separated?
RideAnS [48]
D Snack Mix because they are individual parts that can easily be seperated
3 0
2 years ago
Read 2 more answers
How many mg of metallic ions are in 1.0 mL of 0.10 M LINO3
Anton [14]

Answer:

0.6941 mg

Explanation:

First we <u>calculate how many LiNO₃ moles there are</u>, using the <em>given concentration and volume</em>:

  • 1.0 mL * 0.10 M = 0.10 mmol LiNO₃

As 1 mol of LiNO₃ contains 1 mol of Li,<em> in the problem solution there are 0.10 mmol of Li</em> (the only metallic ion present).

Now we<u> convert Li milimoles into miligrams</u>, using its <em>atomic mass</em>:

  • 0.10 mmol Li * 6.941 mg/mmol = 0.6941 mg

8 0
3 years ago
What are the 4 major macromolecules
ANEK [815]
Carbohydrates
Lipids
Protein
Nucleic acids
8 0
3 years ago
Other questions:
  • One consequence of the third law of thermodynamics is that A. heat engines have efficiencies less than 100 percent. B. in some e
    5·2 answers
  • The sum of potential and kinetic energies in the particles of a substance is called _______ energy.
    13·2 answers
  • Reactions eventually stop. What is generally the reason for this?
    12·1 answer
  • Is Fe + S a mixture, compound, or element?
    5·1 answer
  • Use the periodic table to determine the electron configuration for aluminum (AI) and arsenic (As) in
    13·1 answer
  • Which species do you think is best adapted to a diet of large, tough-to-crack<br> seeds? Explain.
    14·2 answers
  • after a certain pesticide compound is applied to crops its decomposition is a first order reaction with a half life of 56 days.
    14·1 answer
  • A trapezoid is broken into 2 triangles and 1 rectangle. The rectangle has a base of 1 meter and height of 4 meters. Both triangl
    15·2 answers
  • Mohamedaidh00 r u there <br>pls reply​
    12·1 answer
  • 9
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!