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
Wewaii [24]
3 years ago
7

How many moles of sodium atoms in 255 grams of na2so4

Chemistry
1 answer:
solniwko [45]3 years ago
5 0
M_{Na_{2}SO_{4}}=142\frac{g}{mol}\\
m=255g\\\\
n=\frac{m}{M}=\frac{255g}{142\frac{g}{mol}}\approx1,8mol\\\\
1,8mol*2=3,6mol \ of \ sodium \ atoms
You might be interested in
Larger charges or shorter distances result in greater electric<br> force.<br> TRUE<br> FALSE
Nimfa-mama [501]

Answer:

The strength of electric force depends on the amount of electric charge on the particles and the distance between them. Larger charges or shorter distances result in greater force.

Explanation:

5 0
3 years ago
Fulgurites are the products of the melting that occurs when lightning strikes the earth. Microscopic examination of a sand fulgu
BlackZzzverrR [31]

Answer:

Fe₃Si₇

Explanation:

In order to determine the empirical formula, we have to follow a series of steps.

Step 1: Determine the percent composition

Fe: 46.01%

Si: 53.99%

Step 2: Divide each percentage by the atomic mass of the element

Fe: 46.01/55.85 = 0.8238

Si: 53.99/28.09 = 1.922

Step 3: Divide all the numbers by the smallest one

Fe: 0.8238/0.8238 = 1

Si: 1.922/0.8238 = 2.33

Step 4: Multiply by numbers that make the coefficients whole.

Fe: 1 × 3 = 3

Si: 2.33 × 3 = 7

The empirical formula is Fe₃Si₇.

5 0
3 years ago
Simon has collected three samples from the coral reef where he observes marine life. He must determine whether each one is a pur
zysi [14]
SAMPLE A - <span>pure substance.
</span>SAMPLE B - <span>homogeneous mixture.
</span>SAMPLE C - <span>heterogeneous mixture.
</span>Pure substance - <span>constant composition and properties.</span>
Homogeneous mixture - same uniform appearance and composition.
Heterogeneous mixture - <span>not </span>uniform<span> in composition, two phases (liquid and dust).
</span>
7 0
3 years ago
Read 2 more answers
I need help pleasee
Readme [11.4K]

Answer:

Explanation:

6. Where on the graph does adding heat energy NOT raise the temperature?

What is the heat energy DOING if it's not raising the temperature?  :its being compressed I believe its vaporizing

7. What is temperature A called?  Freezing

8. What is temperature B called? Vaporizing

4 0
3 years ago
This is a graded Quiz and I need all of the answers to be right but I am not sure so I need help this is a 3.08 science Quiz and
Setler79 [48]

Answer:

1 true

Explanation:

bcz it is true

8 0
3 years ago
Other questions:
  • What mass of nitrogen is required to react with 16 grams of oxygen?
    6·1 answer
  • Which substance can be described as cations bonded together by mobile electrons?A) Ag(s)
    8·1 answer
  • PLEASE HELP ME! What are some patterns or trends that are present in the table of elements?
    7·1 answer
  • What would the carbon dioxide part of a soft drink be classified as?
    10·2 answers
  • Which can not be decomposed by a chemical change? 1) a compound 2) a heterogeneous mixture 3) a homogeneous mixture 4) an elemen
    11·1 answer
  • Write the balanced neutralization reaction that occurs between H 2 SO 4 and KOH in aqueous solution. Phases are optional. neutra
    15·1 answer
  • A particle has 5 protons, 6 neutrons, and 5 electrons. What is its net charge.
    15·1 answer
  • What is the origin of the word hydrogen?
    15·1 answer
  • First to help me with these 4 gets brainless HURRYTTT UPPPPP
    10·2 answers
  • Ay
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!