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
slega [8]
4 years ago
12

Magnesium has three naturally occurring isotopes with masses of 23.99 amuamu, 24.99 amuamu, and 25.98 amuamu and natural abundan

ces of 78.99%%, 10.00%%, and 11.01%%, respectively. Calculate the atomic mass of magnesium.
Chemistry
2 answers:
Orlov [11]4 years ago
5 0

Answer:

Relative atomic mass of magnesium is 24.3

Explanation:

The relative atomic mass (R. A. M) of an element which exhibits isotopy is the average mass of its various isotopes as they occur naturally in any quantity of the element.

To calculate the relative atomic mass, multiply the percentage value of each with its corresponding mass and add the values together.

R. A. M = ( 78.99/100 * 23.99) + (10/100 * 24.99) + (11.01/100 * 25.98)

R. A. M = 18.949701 + 2.499 + 2.860398

R. A. M = 24.30099

R. A. M = ~ 24.3

bonufazy [111]4 years ago
3 0

Answer:

24.309 g/mol

Explanation:

To get the atomic mass, all we have to do is calculate with the masses of the three isotope, the real quantity present, taking account of the percent and then, do a sum of these three values. Like a pondered media.

For the first isotope:

23.99 * (78.99/100) = 18.95 g/mol

For the second isotope:

24.99 * (10/100) = 2.499 g/mol

For the last isotope:

25.98 * (11.01/100) = 2.86 g/mol

Now, let's sum all three together

AW = 18.95 + 2.499 + 2.86

AW = 24.309 g/mol

You might be interested in
The pressure of a 1-L nitrogen gas sample at 25 ⁰C is 0.30 atm. The pressure of a 1-L oxygen gas sample at the same temperature
ki77a [65]

Answer:

Nitrogen = 0.3 atm

Oxygen = 0.25 atm

Argon  = 0.45 atm

Explanation:

According to Dalton's law of partial pressure, the total pressure in the container is equal to sum of the partial pressures of the individual gases.

Given;

Total pressure of the gases, P_total = 1 atm

Pressure of nitrogen, P_nitrogen = 0.3 atm

Pressure of oxygen, P_oxygen = 0.25 atm

Pressure of argon, P_argon = ?

P_{total} = P_{nitrogen} + P_{oxygen} + P_{argon}\\\\1 \ atm= 0.3 \ atm + 0.25 \ atm + P_{argon}\\\\1 \ atm= 0.55 \ atm +  P_{argon}\\\\ P_{argon} = 1 \ atm - 0.55 \ atm\\\\ P_{argon} = 0.45 \ atm

Therefore, the contribution of each gas to the total pressure of the gas mixture is;

Nitrogen = 0.3 atm

Oxygen = 0.25 atm

Argon  = 0.45 atm

8 0
3 years ago
Write a net ionic equation to show that hydrobromic acid, hbr, behaves as an acid in water.
Harrizon [31]
The net ionic equation of hydrobromic acid would be HBr = H+ + Br-. As we can see, the HBr compound dissociates into ions where one ion is the hydronium ion which characterizes an acid. According to Arrhenius, an acid is a compound which releases hydronium ion in solution. 
3 0
4 years ago
Scientists study different types of life on Earth and classify them into the 5 different
UNO [17]
B. Fungi are heterotrophs and plants are autotrophs
5 0
3 years ago
Read 2 more answers
Prove that PV = nRT.​
qaws [65]

Find your answer in the explanation below.

Explanation:

PV = nRT is called the ideal gas equation and its a combination of 3 laws; Charles' law, Boyle's law and Avogadro's law.

According to Boyle's law, at constant temperature, the volume of a gas is inversely proportional to the pressure. i.e V = 1/P

From, Charles' law, we have that volume is directly proportional to the absolute temperature of the gas at constant pressure. i.e V = T

Avogadro's law finally states that equal volume of all gases at the same temperature and pressure contain the same number of molecules. i.e V = n

Combining the 3 Laws together i.e equating volume in all 3 laws, we have

V = nT/P,

V = constant nT/P

(constant = general gas constant = R)

V = RnT/P

by bringing P to the LHS, we have,

PV = nRT.

Q.E.D

6 0
3 years ago
The catalysts in our bodies are called
Sloan [31]
They're called enzymes
7 0
4 years ago
Read 2 more answers
Other questions:
  • An unknown solute is dissolved in 800 grams of water. The boiling point of the solution is measured to be 101.8°C, or 1.8°C grea
    13·1 answer
  • Energy levels for an electron in a hydrogen atom are:
    12·1 answer
  • Which of the following is not true in regard to atomic radii of main group elements? A. Atomic radii generally increase as you m
    11·2 answers
  • Which of these is an example of a physical change
    15·2 answers
  • Explain how molar mass relates the mass of an atom to mass and moles of the atom
    5·1 answer
  • Which elements are found in all the stars
    6·2 answers
  • If a solution A has twice as much solute as solution B. Is it possible for the solutions to have the same concentration? explain
    11·1 answer
  • Osmium metal, the densest element, has a density of 22.6 g/mL, while hydrogen, the least dense element, has a density of 8.99 e-
    6·1 answer
  • How do you know when a saturated solution has been produced?
    10·1 answer
  • A very specific procedure scientists follow when conducting experiments is known as the
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!