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
maks197457 [2]
3 years ago
6

Calculate the atomic mass of silicon. The three silicon isotopes have atomic masses and relative abundances of 27.9769 amu (92.2

297%), 28.9765 amu (4.6832%) and 29.9738 amu (3.0872%). Show your work.
Chemistry
1 answer:
Kamila [148]3 years ago
6 0
The atomic mass would be 28.08535 amu. Multiply 27.9769 by .92297 = 25.803. Multiply 28.9765 by .046832 to get 1.357. Multiply 29.9738 by .03872 to get .925351136. Add 25.803 + 1.357 + .03872 to get 28.08535 amu
You might be interested in
How do we seperate a mixture of water and sugar
Firlakuza [10]

Answer:

The easiest way to separate a mixture of sugar and water is to use <em><u>distillation</u></em>, a process that separates substances based on their different boiling points. 《☆☆☆☆☆》

Explanation:

Hope it helps JOIN 《Æ §QŮÅĐ》

3 0
2 years ago
Suppose you need to prepare 136.9 mL of a 0.315 M aqueous solution of NaCl.
Varvara68 [4.7K]

Answer:

2.52 g NaCl

Explanation:

(Step 1)

To find the mass, you first need to find the moles NaCl. This value can be found using the molarity ratio:

Molarity = moles / volume (L)

After you convert mL to L, you can plug the given values into the equation and simplify to find moles.

136.9 mL / 1,000 = 0.1369 L

Molarity = moles / volume

0.315 M = moles / 0.1369 L

0.0431 = moles

(Step 2)

Now, you can use the molar mass to convert moles to grams.

Molar Mass (NaCl): 22.990 g/mol + 35.453 g/mol

Molar Mass (NaCl): 58.443 g/mol

0.0431 moles NaCl           58.443 g
------------------------------  x  -------------------  =  2.52 g NaCl
                                            1 mole

4 0
2 years ago
Dry air (0% humidity) is approximately 78% N2, 21% O2, and 1% Ar by moles. Calculate the molar mass and density of dry air at 0
ser-zykov [4K]
Shdhdhdhdhdhshshhzshshshdhdhshd
7 0
2 years ago
497.680 to the nearest gram (1 g)
Lelu [443]
14109 is the nearest gram
6 0
3 years ago
Read 2 more answers
What is 1s2, 2s2s, 2p6, 3s2, 3p5
Sedaia [141]
<span>1s2 2s2 2p6 3s2 3p2, P (Phosphorous)1s2 2s2 2p6 3s2 3p3,S (Sulfur)1s2 2s2 2p6 3s2 3p4,Cl (Chlorine)1s2 2s2 2p6 3s2 3p5, Ar ( Argon)1s2 2s2 2p6 3s2.</span>
3 0
2 years ago
Other questions:
  • 1) How many grams of CO are needed to react with an excess of Fe2O3 to produce 225.5 gFe? Numbers after symbols are subscripts u
    10·1 answer
  • When fe(no3)2(aq) and na2s(aq) are mixed, what is the black coloured precipitate that forms?
    10·1 answer
  • What is the molarity of a solution in which 0.732 moles of hcl are dissolved in 0.975 liters of solution?
    14·1 answer
  • I don't understand what makes a covalent bond "polar." What exactly is polarity?
    14·1 answer
  • Identifying characteristics of atoms, using the periodic table, complete the table to describe each atom.
    5·2 answers
  • The symbol Na represents a sodium atom that has lost an electron. True False
    5·1 answer
  • Ed records the temperature of two pots of water. Pot X has a temperature of 56 degrees Fahrenheit, and pot Y has a temperature o
    8·2 answers
  • A helium balloon has a volume of 25 L when the pressure is 1.551 ATM and the temperature is 20°C. The balloon is cooled at a con
    8·1 answer
  • I HAVE 6 MORE PAGES ON THIS HUUUUUUGE ASSIGNMENT!! WHO WANTS TO HELP?????????? i have alr done 22 pages!!
    5·2 answers
  • The gravitational strength on Earth is greater than the gravitational strength on Mars. Which statement is correct?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!