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
Amiraneli [1.4K]
3 years ago
11

The element copper exists in nature as two isotopes: has a mass of 62.9296 u and has a mass of 64.9278 u.The average atomic mass

of copper is 63.55 u. Calculate the relative abundance of the two copper isotopes.
Chemistry
1 answer:
Reil [10]3 years ago
5 0

Answer:

%isotope 1 = 68.92%

%isotope 2 = 31.08 %

Explanation:

we have the following data:

misotope 1 = 62.9296 u

misotope 2 = 64.9278 u

maverage = 63.55 u

%isotope 1 = X

%isotope 2 = 100-X

the average atomic mass is equal to:

maverage = [(misotope 1x%isotope 1)+(misotope 2x%isotope 2)/100]

substituting values:

63.55 = [(62.9296 x X)+(64.9272 x (100-X))]/100

clearing the X:

X = 68.92

therefore we have to:

%isotope 1 = 68.92%

%isotope 2 = 100-68.92 = 31.08 %

You might be interested in
The chemical formula for artificial sweetener is C7H5NO3S. How many carbon atoms will be found in 5 molecules of the artificial
irga5000 [103]
35

Because there’s 7 carbon atoms in every molecule of artificial sweetener

And if you have 5 molecules of that

7x5 =35
4 0
3 years ago
What type of physical weathering is caused by the expansion of water?
skelet666 [1.2K]

Answer:

wedging

Explanation:

ice or frost wedging

6 0
2 years ago
Determine the acid dissociation constant for a 0.0250 M weak acid solution that has a pH of 2.37 . The equilibrium equation of i
Oksanka [162]

Answer:

For part (a): pHsol=2.22

Explanation:

I will show you how to solve part (a), so that you can use this example to solve part (b) on your own.

So, you're dealing with formic acid, HCOOH, a weak acid that does not dissociate completely in aqueous solution. This means that an equilibrium will be established between the unionized and ionized forms of the acid.

You can use an ICE table and the initial concentration ofthe acid to determine the concentrations of the conjugate base and of the hydronium ions tha are produced when the acid ionizes

HCOOH(aq]+H2O(l]⇌ HCOO−(aq] + H3O+(aq]

I 0.20 0 0

C (−x) (+x) (+x)

E (0.20−x) x x

You need to use the acid's pKa to determine its acid dissociation constant, Ka, which is equal to

3 0
2 years ago
A detailed explanation, one paragraph of the colligative property being discussed and why that property changes the way that it
levacccp [35]
<span>
You can do it on the icing of roads, reverse osmosis for desalination of water, dissolved CO2 in soda cans, osmotic pressure involving blood vessels and IV solutions, etc.</span>
6 0
3 years ago
The number of significant figures in 0.000820 g is?
lubasha [3.4K]
There are 3 sig figs.  8 and 2 are obvious.  The ending 0 is significant because it is at the end of a decimal number, and doesn't have to be measured.
7 0
3 years ago
Other questions:
  • Calculate the percent ionization of nitrous acid in a solution that is 0.222 M in nitrous acid (HNO3) and 0.278 M in potassium n
    8·1 answer
  • What kind of chemical reaction does the chemical equation sodium + chlorine → sodium chloride represent?
    10·2 answers
  • The system responsible for getting oxygen into your blood is known as the __________ .
    6·2 answers
  • How many valence electrons do alkali metals have?
    15·1 answer
  • Suppose the reaction system below has already reached equilibrium. Predict the effect that each of the following changes will ha
    10·1 answer
  • When the liquid is poured through a filter...?
    5·1 answer
  • What does Gibbs free energy predict?
    7·1 answer
  • Please help!!!!! i dont really know what the subject is so-
    5·1 answer
  • A sample of a gas is in a sealed container. The pressure of the gas is 565 torr , and the temperature is 27 ∘C . If the temperat
    12·1 answer
  • What is a diffusion, suspension, and colloid?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!