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
RoseWind [281]
3 years ago
10

When a 14.2-g sample of mercury (II) oxide is decomposed into its elements by heating, 13.2 g Hg is obtained. What is the percen

t composition of the compound?
Chemistry
1 answer:
nevsk [136]3 years ago
4 0
Mercury (ii) oxide is made up of mercury and oxygen. The total mass of mercury (ii) oxide is 14.2 g, after decomposition 13.2 g of mercury were formed, therefore the mass of oxygen 1 g (14.2 g -13.2 g).
Percentage of oxygen = (1/14.2)×100 = 7.04%
Percentage of mercury = (13.2/14.2) × 100 = 92.96%
Therefore, percentage composition of the compound, oxygen is 7.04% and mercury is 92.96%.
You might be interested in
How much heat, in kJ, will be absorbed by a 25.0 g piece of aluminum (specific heat = 0.930 J/g・°C) as it changes temperature fr
faust18 [17]

Answer:

quantity of heat=mc*theta

=25*0.930(76-25)

=25*0.930*51

=1185.75J

=11.9kJ

4 0
3 years ago
Show all calulations
Black_prince [1.1K]
Im confused here. Add the rest of the question for me to help you
5 0
2 years ago
Students are investigating the relationship between pressure and temperature in gases. They have blown up a balloon with carbon
Ierofanga [76]

Answer:

b

Explanation:

8 0
3 years ago
Read 2 more answers
Use the periodic table to choose the element that matches each description.
nika2105 [10]

Using the periodic table to choose the element that matches each description include the following below:

  • Halogen: iodine
  • Group IIA: magnesium
  • Nonreactive: argon
  • Alkali metal: potassium.

<h3>What is a Periodic table?</h3>

This contains elements which are arranged according to the order of their atomic number in a tabular form. There are 18 groups which are the vertical columns present while there are 8 periods which are the horizontal rows present in the periodic table.

Example of an alkali metal is potassium while the non reactive ones include argon, neon etc. Examples of halogens include chlorine, iodine etc. are the ones which have seven electrons in their outer electron shells thereby just requiring one electron to achieve to obtain a stable octet configuration.

These are therefore the elements which match the descriptions provided in this case and is the most appropriate choice.

Read more about Periodic table here brainly.com/question/15987580

#SPJ1

8 0
1 year ago
Is condensation an exothermic or endothermic process? Based on Le Cha^telier’s principle, would you predict the vapor pressure o
Irina18 [472]

Explanation:

A process in which water vapor changes into liquid state is known as condensation. As we know that when energy is released in a reaction then it is known as exothermic reaction and when energy is absorbed in a reaction then it is known as endothermic reaction.

As vapors have high energy so, when they change into liquid state then heat energy is released by them. Therefore, condensation is an exothermic reaction.

As per Le Chatelier's principle, any disturbance caused in an equilibrium reaction will tend to shift the equilibrium in a direction away from the disturbance.

So, when there will occur a decrease in temperature then molecules of a gas will come closer to each other. Hence, there will also occur a decrease in vapor pressure of the gas.

7 0
3 years ago
Other questions:
  • A certain block is floating in water with 77% of itself submerged. It has a length of 4.3 cm, a width of 5.9 cm, and a height of
    11·1 answer
  • In ancient times, what would the Moon have looked like from the Earth?
    14·2 answers
  • A government laboratory wants to determine whether water in a certain city has any traces of fluoride and whether the concentrat
    5·2 answers
  • What type of isotope undergoes radioactive decay?
    11·1 answer
  • Which of these metals is least likely to be involved in chemical reactions?
    10·1 answer
  • Electrons _______ around the nucleus of an atom.
    15·1 answer
  • Convert 3.4 kg to grams
    6·1 answer
  • Balance the foll. equations
    12·2 answers
  • Diabetes occurs when there is a large amount of sugar in the blood. Which gland is most likely not functioning well enough in a
    15·1 answer
  • Which explanation describes why seafloor spreading occurs?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!