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
Alex777 [14]
3 years ago
5

La is element 57 on the periodic table a sample contains 2.82 * 10€25 power atoms of La calculate the amount of LA

Chemistry
1 answer:
vodka [1.7K]3 years ago
5 0

Answer:

n=46.8molLa\\\\m=6.50x10^3gLa

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to calculate both moles and grams of lanthanum by using the Avogadro's number as a relationship of atoms to moles and its atomic mass as a relationship to moles to grams to obtain the following:

n=2.82x10^{25}atomsLa*\frac{1molLa}{6.022x10^{23}atomsLa}=46.8molLa\\\\m=46.8molLa*\frac{138.9gLa}{1molLa}  =6.50x10^3gLa

Regards!

You might be interested in
What is number 1 for b, c, and d?
SVETLANKA909090 [29]
B because....................
4 0
3 years ago
"which is a correct description of the organization of subatomic particles in atoms?"
Irina18 [472]
Which is a correct description of the organization of subatomic particles in atoms?

Protons and neutrons are tightly packed into a small nucleus. Electrons occupy the space
outside the nucleus

hope this helps.
5 0
3 years ago
The kinetic molecular theory describes the behavior of gases in terms of particles in?
Dominik [7]
The answer is motion, this is what I would go with because when you are dealing with gases it puts motion in the term of particles.
6 0
3 years ago
Uranium has atomic number 92. Its most common isotope is 238U, but the form used in nuclear bombs and nuclear power plants is 23
Yakvenalex [24]

Explanation:

Atomic Number = Number of protons

Mass Number = Number of protons + Number of neutrons

Isotopes are simply atoms of an element with the same number of protons and different number of neutrons.

First Isotope -- 238U

Number of neutrons = Mass Number - Atomic Number

Number of neutrons =  238 - 92 = 146

Second Isotope -- 235U

Number of neutrons = Mass Number - Atomic Number

Number of neutrons =  235 - 92 = 143

3 0
3 years ago
Where does the 'Equiv' come from?
slega [8]

Explanation:

Equiv means equivalent ...

5 0
2 years ago
Other questions:
  • What is the frequency of a wave that has 3 waves every five seconds?
    14·1 answer
  • What atomic or hybrid orbitals make up the pi bond between the C1 And C2 in tetrafluoroethylene, C2F4? How many sigma bonds does
    9·1 answer
  • When a match is lit, sulfur (S8) reacts with oxygen to release energy and form sulfur dioxide, SO2. Write the balanced equation
    12·1 answer
  • Assuming the same temperature and pressure for each gas, how many milliliters of carbon dioxide are produced from 16 0 mL of CO
    9·1 answer
  • A plate moves 200 m in 10,000 years. What is its rate in cm/year?
    15·1 answer
  • What is the δg for the following reaction at 25°c? so3(g) h2o(l) → h2so4(l) given: so3(g):δg= –368 kjper mole h2o(l):δg= –237 kj
    6·1 answer
  • The density of aluminium is 2.70 g/cm3. Find the mass in grams of a bar of aluminum measuring 2.03 cm by 3.0056 cm by 13.4 cm.
    11·1 answer
  • What is the bond formation of N and H
    10·2 answers
  • Ethanol, C2H5OH, is manufactured on a large scale for a wide range of uses such as alcoholic drinks, as an industrial solvent an
    8·1 answer
  • What was the main reason why Alfred Wegener's theory about the movement of the continents was dismissed in 1912?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!