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
just olya [345]
3 years ago
7

1. Naturally occurring europium (Eu) consists of two isotopes was a mass of 151 and 153. Europium- 151 has an abundance of 48.03

% and Europium-153 has an abundance of 51.97%. What is the atomic mass of europium?​
Chemistry
2 answers:
sergejj [24]3 years ago
3 0
The atomic mass of Europium is 152 amu

Work:
151(0.4803) = 72.52 amu
153(0.5197) = 79.5 amu
72.5 + 79.5 = 152 amu
Mazyrski [523]3 years ago
3 0
34 percent would mean sudden and careful passing
You might be interested in
Which of the following is consistent with a reaction that proceeds spontaneously in the reverse direction (assume all variables
elena-s [515]

Answer:

B. ΔG > 0, Q > K

Explanation:

For reverse reaction to take place Q should be greater than K

Since reverse reaction should be spontaneous, forward reaction should be non spontaneous.

So, for forward reaction, ΔG > 0

Hence, the correct answer is B

8 0
3 years ago
Quarks are thought to be the building blocks of protons. Which was most affected by the discovery of the quark?
Bogdan [553]
<span>C. the view that the atom cannot be broken down further than protons</span>
7 0
4 years ago
Read 2 more answers
When a drawing made with a black marker gets wet, the marker bleeds and more separates into several colors. What method of separ
Mnenie [13.5K]
This example is describing the Chromatography method. 
8 0
3 years ago
Read 2 more answers
Eye and hair color are examples of what?
NemiM [27]
 the anwser is genotypes which is a personal characsteristic such as skin color eye or hair color or height
3 0
3 years ago
Which element can expand its valence shell to accommodate more than eight electrons? which element can expand its valence shell
Anvisha [2.4K]
<span>According to octet rule,  atoms with an atomic number less than 20 tend to combine  with other atom such that both of these atoms have eight electrons in their valence shells, which gives them the same electronic configuration as that of noble gas.

However, there are few compound that donot obey octel rule. Among the elements mentioned above i.e. oxygen and helium obeys octet rule.

In case of nitrogen, oxide of nitrogen (like NO and NO2) have incomplete octet. 

While there are few compounds of Br wherein Br has expanded octet. For example, in BrF5, Br has 12 electrons in valence shell. </span>
3 0
3 years ago
Read 2 more answers
Other questions:
  • What three obstacles did dmitri mendeleev face in his life
    9·2 answers
  • Your mom is playing the drums in the basement. Whenever she hits the drum with all her force, the box next to the drums shakes,
    11·1 answer
  • What is the maximum mass of aluminum chloride that can be formed when reacting 18.0 g of aluminum with 23.0 g of chlorine?
    7·2 answers
  • Class science A revolution occurs:
    15·2 answers
  • How concentrated can lye solution be before its ph rises above calcium hydroxide saturated water?
    9·1 answer
  • ¿Cuál(es) de las siguientes propiedades aumentan a más Z en un grupo?
    5·1 answer
  • How can you tell a meteor from a comet in the night sky
    15·1 answer
  • At a certain temperature, the vapor pressure of pure benzene (C6H6) is 0.930 atm. A solution was prepared by dissolving 10.0 g o
    11·1 answer
  • Which of the following choices is not evidence supporting the theory of plate tectonics?
    5·1 answer
  • Based on details from "Thomas Edison: The Master of Improvement,” how did Joseph Swan and Thomas Edison differ?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!