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
melamori03 [73]
3 years ago
5

What is the empirical formula for a molecule containing 46.8% Si and 53.2% O?

Chemistry
1 answer:
Over [174]3 years ago
4 0
Assume there are 100 g of the substance.
Masses:
Si: 46.8 g
O: 53.2 g
Moles:
Si: 46.8 / 28 = 1.67
O: 53.2 / 16 = 3.32
Dividing by the smaller number:
Si: 1.6 7/ 1.67 = 1
O: 3.32 / 1.67 = 2
Thus, the formula:
SiO2
You might be interested in
Aq. sodium oxalate reacts with aq calcium chioride to form sd nd soum ce
STatiana [176]
Na2C2O4(aq) + CaCl2(aq) -----> 2NaCl(aq) + CaC2O4(s)

Here, CaC2O4(s) is a precipitate in the reaction as a result of precipitation reaction or double displacement reaction.

As we know that double displacement reaction two metal ions displaces each other from their salt solutions.

As we know that precipitation reaction is a reaction in which precipitate is formed.
4 0
3 years ago
Which best describes the effect of J. J. Thomson’s discovery?
vlabodo [156]
The correct answer for the question that is being presented above is this one: "A. The accepted model of the atom was changed.<span>" </span>J J Thomson discovered the electrons and performed experiment using the cathode ray tube
Here are the following choices:
<span>A. The accepted model of the atom was changed.
B. The accepted model of the atom was supported.
C. Cathode ray tubes were no longer used in experiments due to poor results.
D. Cathode ray tubes became the only instrument of use in the study of atoms</span>
8 0
2 years ago
Why do you think it is important to use the same blanace throughout the entire experiment?
Zepler [3.9K]

It is important to use the same balance throughout the entire experiment since the calibration of each balance is not the same and changing balances could result in a systematic error.

There are three types of errors that could affect the results of the experiment. The effect of random or indeterminate errors is hard to predict, its effect on the results of the experiment could be different every time. The second type of error is the systematic or determinate error, which causes a shift in results in a specific direction. The last type of error in an experiment is human error.

The type of error that could be related to the use of different balances throughout the experiment is the systematic error. Instruments could be a source of error especially if they are poorly calibrated. Also, analytical balances are calibrated differently which may result in inaccuracy in the weighing of chemicals.

To learn more, please refer to brainly.com/question/11541675.

#SPJ4

6 0
2 years ago
Why is it important to have the correct bond angles of the different atoms and the shape of the molecule? (20 points NEED ANSWER
hjlf

It is important to have the correct bond angles of the different atoms and the shape of the molecule due to following reasons;

                  Among other properties the polarity of compounds mainly depend upon the shape and bond angles of that particular compound. For example, considering the molecule of water, we already know that it is a polar molecule with partially positive hydrogen atoms and partially negative oxygen atoms and acts as universal solvent. The bond angle in water is about 104.5° with a Bent geometry. Unlike carbon dioxide (CO₂) which has Linear structure with bond angle 180° and is non-polar in nature therefore, the bent geometry in water is responsible for the polarity.

                  Other properties which can also be predicted by predicting the bond angles along with molecular geometries are;

                                      i) Magnetism

                                      ii) Phase of matter

                                       iii) Color

                                      iv) Reactivity

                                       v) Biological activities <em>e.t.c</em>

                     

5 0
3 years ago
How many moles of water are produced from 40.0 g of C2H6?
inn [45]

Answer:

4 moles of water

Explanation:

this is a combustion reaction, so the balanced equation is: 2C2H6 + 7O2 → 4CO2 + 6H2O.

the molar mass of C2H6 is 30.07g, so 40.0 g of C2H6 is 1.33 moles of C2H6.

mole ratio of H2O to C2H6 is 6/2, or 3.

1.33 moles C2H6 * 3 moles H2O/1 mole C2H6 = 4 moles H2O

4 0
2 years ago
Other questions:
  • An unknown quantity of sugar was completely dissolved in water at 75 degrees Celsius to form a clear and colorless solution. The
    13·1 answer
  • What is the formula for CaCO3
    14·1 answer
  • The number of unique open-chain structures corresponding to the molecular formula c3h5cl is:
    12·1 answer
  • If you have 100.0ml of a 30.0% aqueous solution of ethanol, what volume of water is in the solution?
    5·1 answer
  • 3. Which of these statements is an accurate description of the ionization energies of elements in the periodic table?
    15·1 answer
  • A 1.2-L container of liquid nitrogen is kept in a closet measuring 1.0m by 1.3m by 2.0m . Assume that the container is completel
    12·1 answer
  • .
    5·1 answer
  • Which of the following elements have the stronger attraction in a covalent bond with hydrogen, c, Na, O or S?
    5·1 answer
  • for each compound write a complete reaction equation showing the removal of the atoms that become the water molecule
    13·1 answer
  • This question is about salts.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!