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
ser-zykov [4K]
3 years ago
8

An unknown element is a mixture of

Chemistry
1 answer:
seropon [69]3 years ago
8 0

Answer:

10.13086%

Explanation:

129y + 132(1-y) = 129.91

129y + 132 - 132y = 129.91

-3y = -2.09

y = 0.69666 (5 s.f.)

% abundance of 132X = 100% - (129×0.69666)%

                                    = 100% - 89.86914%

                                    = 10.13086%

                                    = 10.1% (3 significant figures)

*y is just a variable for the equation

You might be interested in
You leave a piece of bread outside for a few days. It forms green and blue mold. It smells awful. A chemical change has occurred
NeX [460]

Answer:

False

Explanation:

It is not a chemical change, it is a physical change because the molecules of the bread didn't  change, the form of the bread did

4 0
4 years ago
Modeling Nuclear changes
alina1380 [7]
Whats the question?...
7 0
3 years ago
How many oxygen atoms in 2.28 mol HNO3 ?
krek1111 [17]
Formula is moles =massin grams of HNO3/molar mass of HNO3
5 0
3 years ago
All light is the same whether it comes from the sun a light bulb or anywhere
ziro4ka [17]

Answer:

no because the suns light is way more bright than lightbulbs.

Explanation:

6 0
3 years ago
Read 2 more answers
33. Why does Fluorine exert a stronger pull than Chlorine on the valence electrons of another
mariarad [96]

Answer:

Fluorine is much more reactive than chlorine (despite the lower electron affinity) because the energy released in other steps in its reactions more than makes up for the lower amount of energy released as electron affinity.

Explanation:

7 0
3 years ago
Other questions:
  • I give 10 points for 3 tasks + BRAINLIEST!!!!
    13·1 answer
  • Which question must be answered to complete the table below?
    7·1 answer
  • PLEASE ANSWER FAST AND YOU WILL GET 15 POINTS AND BRAINLIEST if you answer both questions
    5·1 answer
  • How many milliliters of a 3.0 M HCl solution are required to make 250.0 milliliters of 1.2 M HCl?
    9·1 answer
  • According to Boyle's law, the volume of a gas is inversely proportional to its pressure if the _____. number of particles and te
    12·1 answer
  • Many tall buildings have a
    9·1 answer
  • What is a line graph
    15·1 answer
  • Water is super soluble and this solubility is incredibly helpful for life. Tell me how this solubility helps maintain different
    11·1 answer
  • Which organism obtains energy without depending on another organism
    11·1 answer
  • When some water condensed
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!