ehsaangaminglegend
28.10.2020 •
Chemistry
Fill in the blanks: a substance that undergoes a change will always result in something new that has properties than what it started out as. A- physical and different. b- physical and same. C-chemical and different. D chemical and same
Solved
Show answers
More tips
- S Sport How to Get Rid of Belly Fat: Easy Way to Achieve the Perfect Figure...
- F Family and Home When and how to start introducing solid foods to your baby?...
- B Business and Finance Moneybookers – What it is and How it Works...
- C Computers and Internet How to Format Your C Drive: Detailed Guide and Tips...
- F Food and Cooking What can and cannot be eaten during Lent?...
- H Health and Medicine What to Do When Your Jaw Locks Up?...
- F Family and Home Why Having Pets at Home is Good for Your Health...
- D Dating, Love, Relationships Is it a Compliment or Flattery: What s the Difference?...
- S Science and Technology The Metric System in Our Daily Life: Understanding Its Importance...
- C Computers and Internet What to Do If Your ICQ Gets Hacked?...
Answers on questions: Chemistry
- C Chemistry Dr. garcia is conducting an experiment to see how caffeine affects a person s brain activity. she asks ten test subjects to drink a cup of tea and tells them that there...
- C Chemistry What are physical properties of cobalt silicate ?...
- C Chemistry 10 If velocity is positive, which would most likely yield a negative acceleration? O O OO A final velocity that is faster than an initial velocity. A time that is less...
- C Chemistry Consider the double replacement reaction given below: HgNO3(aq) + KBr(aq) → HgBr (??) + KNO3(??)The state of matter for HgBr would be...
- M Mathematics two ships are sailing parallel to each other. THe path of one ship is represented on a coordinate plain as the line y=-1/3x +4. the second ship ships passes through the...
- H History What is the best explanation for how modern technology can cause culture to lose its uniqueness? A. culture can become dilutedB. culture can become genericC. culture can...
- P Physics Which of the following procedures demonstrates repetition? A. Marco places a toy car at the top of a ramp. He releases the car and measures how long it takes for the car...
- H Health Select the correct answer. In order to improve your cardiorespiratory endurance, you must participate in strenuous exercise. Ο Α. True OB. False Reset Next...
- B Biology The monomer of a carbohydrate is called: Question 3 options: lipid monosaccharide fatty acid...
- E English How do the quotes provided by students contribute to the authors discussion of making college experiences meaningful ?...
Ответ:
Ответ:
25.4 amu
Explanation:
Step 1: Given data
Mass of the isotope ²⁵X (m²⁵X): 25 amuAbundance of the isotope ²⁵X (ab²⁵X): 80.5 % = 0.805Mass of the isotope ²⁷X (m²⁷X): 27 amuAbundance of the isotope ²⁷X (ab²⁷X): 19.5% = 0.195Step 2: Calculate the average atomic mass of X
We will use the following expression.
m = m²⁵X × ab²⁵X + m²⁷X × ab²⁷X
m = 25 amu × 0.805 + 27 amu × 0.195
m = 25.4 amu