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
dedylja [7]
3 years ago
10

How many moles are there in 7.50 x 10^23 atoms of iron?

Chemistry
1 answer:
AnnyKZ [126]3 years ago
8 0

Answer:

1.25 mol

Explanation:

1 mol ---- 6.02*`0^23 atoms

7.50*10^23 atoms * 1 mol/6.02*10^23 atoms = 1.25 mol

You might be interested in
At what temperature does ice start to melt
Delicious77 [7]

Answer:

Explanation:

The answer is 32°F or 0° Celsius.

Hope it helped you.

5 0
2 years ago
An unknown aqueous metal analysis yielded a detector response of 0.255. When 1.00 mL of a solution containing 100.0 ppm of the m
AVprozaik [17]

Answer:

1.022ppm is the unknown concentration of the metal

Explanation:

Based on Lambert-Beer law, the increasing in signal of a detector is directly proportional to its concentration.

The unknown concentration (X) produces a signal of 0.255

99mL * X + 1mL * 100ppm / 100mL produces a signal of 0.502

0.99X + 1ppm produce 0.502, thus, X is:

0.255 * (0.99X + 1 / 0.502) =

X = 0.503X + 0.508

0.497X = 0.508

X =

1.022ppm is the unknown concentration of the metal

3 0
2 years ago
Science there’s a picture
melomori [17]

Answer:

D)

Explanation:

seems like the most logical option out of all listed.

4 0
2 years ago
It is found that, when a dilute gas expands quasistatically from 0.40 to 5.0 L, it does 210 J of work. Assuming that the gas tem
fenix001 [56]

Answer:

n=0.033mole

Explanation:

From the question we are told that:

Initial volume V_1=0.40L

Final VolumeV_2=5.0L

Work W=210J

Temperature T=300k

Generally the equation for Ideal gas is mathematically given by

W=nRTIn\frac{V_2}{V_1}

n=\frac{W}{RTIn\frac{V_2}{V_1}}

n=\frac{210}{8.32*300In\frac{5.0}{0.4}}

n=0.033mole

6 0
3 years ago
High-pressure liquid chromatography (HPLC) is a method used in chemistry and biochemistry to purify chemical substances. The pre
Viktor [21]
Its running pressure in torr would be :

5.10 x 10^8 pa  x 1kPa/1000 Pa x 760 / 101.325 kPa

= 5.10 x 10 ^5  x   76 x 10^-1  x 1.01325 x 10 ^-2

= 392.7375 x 10^2

= 3.927275 x 10^4

ope this helps
5 0
3 years ago
Read 2 more answers
Other questions:
  • How do you write a message?
    8·2 answers
  • In a chemical reaction, one or more substances called __________ are combined or broken down to form ___________. products; reac
    5·1 answer
  • What does the zeroth law of thermodynamics allow us to define?
    7·2 answers
  • A chemical reaction produces 11.8 moles of tin atoms how many grams of tin are made
    12·1 answer
  • 2. What is an example of a molecule<br> with different types of atoms?
    7·1 answer
  • Using standard heats of formation, calculate the standard enthalpy change for the following reaction. 2H2S(g) 3O2(g)2H2O(l) 2SO2
    9·1 answer
  • A sample of gas occupies 3.00 L with 5.00 moles present. What would
    11·1 answer
  • Burning something is always a chemical change that requires a fuel and
    14·2 answers
  • 20.8 grams of ethanol (CH3CH2OH) was burned in a calorimeter containing 200.0 grams of water. If the
    9·1 answer
  • The number of cobalt atoms in 0.00103 mole of cobalt​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!