# Chemistry Problem: Solving with Molar Mass & Isotope Abundance

• cpatel23
In summary, the problem involves finding the average molar mass for an element with two isotopes, X and Y, which have molar masses mx and my, and percentage abundances px and py. The equation for the average molar mass can be rearranged to solve for the relative abundance of the first isotope (x), assuming that the other isotope has a relative abundance of 1-x. By setting this equation equal to the given average molar mass, the value of x can be solved for.
cpatel23
Hello.
I am doing a chemistry problem but it is mainly mathematics

Here it is.

A little info that is useful to this problem.

Molar mass is always an average, given by

Molar Mass = (mass of isotope1 * abundance of isotope 1) + (mass of isotope2 + abundance of isotope 2)

Masses of isotopes are always constant, they do not vary from place to place.

So how do I solve this?

While the molar masses do not change, the relative abundances can and do.

An element has isotopes X and Y which have molar masses mx and my with percentage abundances px and py ... rearrange those variables to give an equation for the average molar mass for the element.

If we are to assume that the two isotopes given here are the only ones we need consider, then let "x" be the relative abundance of the first (U235) and then the relative abundance of the other (U238) is 1- x.

So we must have x(235.043924)+ (1- x)(238.050784)= 238.0375.

Solve that equation for x.

## 1. Why is it so frustrating when something seems easy but I can't solve it?

It's frustrating because we expect things that seem easy to actually be easy. When we struggle with something that seems simple, it can make us doubt our abilities and feel discouraged.

## 2. What can I do to overcome the frustration of not being able to solve something that seems easy?

First, take a break and come back to it with a fresh perspective. Sometimes our minds need time to process and work through a problem. Second, break the problem down into smaller, more manageable steps. This can help identify where the difficulty lies and make it easier to solve. Lastly, don't be afraid to ask for help or seek out different resources for assistance.

## 3. Why do some people find easy tasks difficult while others can solve them effortlessly?

Everyone has different strengths and weaknesses, and some tasks may come easier to some people based on their background, experience, and problem-solving abilities. It's important not to compare yourself to others and to focus on your own progress and growth.

## 4. How can I improve my problem-solving skills for tasks that seem easy?

Practice! The more you work on problem-solving, the better you will become at it. Also, try approaching problems from different angles and don't be afraid to experiment with different methods and strategies. Additionally, seeking out new challenges and learning opportunities can help improve problem-solving skills.

## 5. Is it normal to struggle with something that seems easy?

Yes, it is completely normal to struggle with tasks that seem easy. Remember that everyone faces challenges and difficulties, and it's important to not get discouraged and keep trying. With perseverance and practice, even the most seemingly easy tasks can be conquered.

• Biology and Chemistry Homework Help
Replies
7
Views
4K
• Biology and Chemistry Homework Help
Replies
6
Views
2K
• Biology and Chemistry Homework Help
Replies
4
Views
1K
• Biology and Chemistry Homework Help
Replies
14
Views
9K
• Biology and Chemistry Homework Help
Replies
2
Views
3K
• Biology and Chemistry Homework Help
Replies
13
Views
3K
• Biology and Chemistry Homework Help
Replies
13
Views
3K
• Biology and Chemistry Homework Help
Replies
4
Views
2K
• Biology and Chemistry Homework Help
Replies
2
Views
7K
• Biology and Chemistry Homework Help
Replies
16
Views
3K