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
anastassius [24]
3 years ago
11

Binary compound of oxygen and an unknown element,X, has the formula XO2 and is 69.55 mass % oxygen, what is the weight of elemen

t X?
Chemistry
1 answer:
marissa [1.9K]3 years ago
6 0

Answer:

Weight of element X = 14.01 gram

Explanation:

Mass percentage is calculated by using :

Percent =\frac{Mass\ of\ element}{Total\ mass}\times 100

O\ Percent=\frac{Mass\ of\ O}{Total\ mass\ of\ XO2}\times 100

Mass of O = 16.0 gram

let mass of X = X grams = ?

Mass of XO2 = mass of X + 2(mass of O)

Mass of XO2 = X + 2(16)

Mass of XO2 = X + 32

Total mass of O in the compound = 2(16) = 32 grams

Percent O = 69.55 %

Percent\ O =\frac{Mass\ of\ O}{Total\ mass\ of\ XO2}\times 100

69.55=\frac{32}{X+32}\times 100

\frac{69.55}{100}=\frac{32}{X+32}

0.6955=\frac{32}{X+32}

0.6955\times (X+32)=32

0.6955X+ 22.256=32

0.6955X=9.744

X=\frac{9.744}{0.6955}

X =14.01

weight of element X = 14.01 gram

14.01 is mass of nitrogen N

The correct formula of this element is NO2

You might be interested in
Scientists are studying cold and dry environments on earth that are like the environment on Mars. What kind of prokaryotes do yo
FinnZ [79.3K]

The answer is; extremophiles

These organisms are found in places on earth that would be damaging to most life on earth. There are different categories of extremophiles depending on their environment. For example, those that live in the extreme cold (even below  150C ) are called Psychrophiles while Xerophiles live extreme desiccation.


7 0
3 years ago
Read 2 more answers
A 24% acid solution is mixed with a 14% acid solution to form a 19% acid solution. How many liters of the 24% acid solution are
Kay [80]

Answer: 5 Liters

Explanation:

According to the dilution law,

M_1V_1+M_2V_2=M_3V_3

where,

M_1 = concentration of first solution = 24%

V_1 = volume of first solution = x L

M_2 = concentration of second solution = 14%

V_2 = volume of second solution = (10-x) L

M_3 = concentration of final solution = 19%

V_2 = volume of final solution = 10 L

Putting i the values, we get:

24\times x+14\times (10-x)=19\times 10

x=5L

Therefore, 5 Liters of the 24% acid solution are used to make 10 liters of the 19% acid solution.

4 0
4 years ago
State 3 evidences that the particles of substances are in continuous motion
lisabon 2012 [21]
The answer is gas and it involves the Kinetic molecular theory which is a model used to predict gas behavior. Molecules or atoms
4 0
4 years ago
Glycogen is _____.
IgorC [24]

Answer:

A polysaccharide found in animals.

Explanation:

Biomolecules are the important chemical compounds present in the living organisms and responsible for all the functional activities of the body. Four important biomolecules are carbohydrates, proteins, fats and lipids.

Glycogen is a carbhydrate made of the polymer of the glucose linked through the glycosidic bonds. The glycogen acts as the energy source and present in animals mainly. Glycogen is mainly stored in the liver and the skeletal muscles of the animals.

Thus, the correct answer is option (a).

4 0
3 years ago
Read 2 more answers
in a titration 5.0 mL of a 2.0 M NaOH(aq) solution exactly neutralizes 10.0 mL of an HCI(aq) solution. What is the concentration
Hitman42 [59]
Volume of base(NaOH)= Vb =5 mL
Concentration of base(NaOH)= Mb =2 M
Volume of acid(HCl)= Va =10 mL
Concentration of acid(HCl)= Ma = ?
Now,
                                    Ma*Va = Mb*Vb
                                   Ma*(10) = (2)*(5)

                                   Ma= 1M
7 0
4 years ago
Other questions:
  • When the reaction
    5·1 answer
  • Which of the following do not form by deposition? beaches, deltas, moraines, mountains
    5·2 answers
  • When aluminum is combined with oxygen, aluminum oxide is formed. The rearrangement of the atoms involved is an example of what?
    6·2 answers
  • The phase that is most likely to occur at high temperatures and high pressures is: gas solid liquid all of the above
    5·2 answers
  • How much heat is given off when 869 g iron bar cools from 94 degrees celsius to 5
    11·1 answer
  • What is the new solution concentration when 150. mL of water is added to 200. mL of a 3.55 M HBr solutions.
    6·1 answer
  • Are elements always transparent
    14·1 answer
  • What process takes place when hydrogen-3 and hydrogen-2 combine to form
    8·1 answer
  • Would someone mind helping me? I really need this answer but I'm so confused. I would appreciate any help :) and if you get the
    10·2 answers
  • Hi there, I need help producing the aim and hypothesis for the question
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!