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Answer the question below. Use the rubric in the materials for help if needed.
A compound is 40.0 % C, 53.3 % 0, and 6.66 % H What is its molecular formula if its molecular mass is 60 g? Show all your work.
Answers
Answer: The molecular formula will be [tex]C_2H_4O_2[/tex]
Explanation:
If percentage are given then we are taking total mass is 100 grams.
So, the mass of each element is equal to the percentage given.
Mass of C = 40.0 g
Mass of O = 53.3 g
Mass of H = 6.66 g
Step 1 : convert given masses into moles.
Moles of C =[tex]\frac{\text{ given mass of C}}{\text{ molar mass of C}}= \frac{40.0g}{12g/mole}=3.33moles[/tex]
Moles of O =[tex]\frac{\text{ given mass of O}}{\text{ molar mass of O}}= \frac{53.3g}{16g/mole}=3.33moles[/tex]
Moles of H =[tex]\frac{\text{ given mass of H}}{\text{ molar mass of H}}= \frac{6.66g}{1g/mole}=6.66moles[/tex]
Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.
For C = [tex]\frac{3.33}{3.33}=1[/tex]
For O =[tex]\frac{3.33}{3.33}=1[/tex]
For H = [tex]\frac{6.66}{3.33}=2[/tex]
The ratio of C : O : H = 1: 1: 2
Hence the empirical formula is [tex]COH_2[/tex]
The empirical weight of [tex]COH_2[/tex] = 1(12)+1(16)+2(1)= 30g.
The molecular weight = 60 g/mole
Now we have to calculate the molecular formula.
[tex]n=\frac{\text{Molecular weight }}{\text{Equivalent weight}}=\frac{60}{30}=2[/tex]
The molecular formula will be=[tex]2\times CH_2O=C_2H_4O_2[/tex]
Related Questions
Nonliving and living things are made of matter.which of the following statements is true about matter
Answers
Answer:
list the statements so i can help
Explanation:
Answer :Nonliving and living things can be made up of combined elements
Explanation:
Which has more mass: a stick of 4 counting cubes or a pile of 4 counting cubes?
Answers
i have thids quuuuesstttttttiopn
when 48 .0g of carbon reacts with oxygen gas to form carbon dioxide, no carbon or oxygen is left over. How much oxygen is reacted if 176.0g of carbon dioxide is produced
Answers
Answer:
128g
Explanation:
Given parameters:
Mass of carbon = 48g
Mass of carbon dioxide = 176g
Unknown:
Mass of oxygen that reacted = ?
Solution:
Every chemical reaction must obey the law of conservation of mass. It states that "in a chemical reaction, matter is neither created nor destroyed" .
So;
Mass of carbon + Mass of oxygen = Mass of carbon dioxide
Mass of oxygen = Mass of carbon dioxide - Mass of carbon
Mass of oxygen = 176 - 48 = 128g
can someone help answer this? thanks!
if surface tension relies on intermolecular forces, how could you make surface tension decrease?
(think about how and where molecules bind to each other)
Answers
Answer:
We could make the surface tension to decrease by removing and causing a disruption to the intermolecular forces(hydrogen bonds).
Explanation:
To explain this answer, we will consider an experiment whereby a paper clip is made to rest at the top surface of water inside a container/beaker.
First of all, the intermolecular forces present in water are also known as hydrogen bonds.
It's relationship with surface tension is that when there is high surface tension in the water, this high tension will allow the paper clip to rest on top of the hydrogen bonds present at the top surface in between the water molecules.
However, the surface tension will decrease when we remove or cause a disruption to the intermolecular forces (hydrogen bonds).
What are the three parts of the cell theory?
Answers
Second cell theory. Cells are the basic unit of structure and function in living things.
Third cell theory. All cells are produced from other cells
Calculate the mass of a
molecule of sulfur (IV) oxide
and express it in grams,
kilograms and daltons.Please help
Answers
Answer:
10.63 × 10^(-24) g
10.62 × 10^(-27) kg
64 daltons
Explanation:
Formula for sulfur (IV) oxide is; SO2
Now,
Atomic mass of Sulphur is 32 while atomic mass of oxygen is 16.
Thus;atomic mass of SO2 is;
32 + (16 × 2) = 64 amu
Now,
1 mole of a substance has 6.02 × 10^(24) molecules
Therefore mass of 1 molecule of SO2 will yield;
Mass(g) = 64/(6.02 × 10^(24)) = 10.63 × 10^(-24) g
Converting to kg, we have;
10.63 × 10^(-24) ÷ 1000 = 10.62 × 10^(-27) kg
Now, converting to Dalton, we know that;
1kg = 6.022 × 10^(26) amu
Thus; 10.62 × 10^(-27) kg will yield;
(10.62 × 10^(-27) × 6.022 × 10^(26))/1 ≈ 64 amu
Now, from conversion;
1 amu = 1 Dalton.
Thus, 64 amu = 64 daltons
Describe two differences between transition elements and alkali metals?
Answers
Explanation:
On the periodic table, we can find a wide range of elements from alkali metals, to the alkali earth metals, transition metals and through to the noble gases.
The alkali metals are found on the first group in the periodic table and they are group of metals. Also, the transition elements are also a group of metals.
Transition elements are known to have variable oxidation states whereas, alkali metals have an oxidation state of +1. Transition metals belong the d-block on the periodic table whereas alkali metals are found in the first group on the periodic table.Homeostasis refers to what in regards to living organisms?
Question 4 options:
The chemical processes maintaining balance within the living organism
The way an organism makes food
The organisms Home status
The way an organism captures and uses energy
Ni
Answers
Answer:
I think that the answer is B or a
Explanation:
Which of the following is the smallest particle of matter?
A. Atom
B. Cell
C. Molecule
D. Organ
Answers
Answer:
A. Atom
Explanation:
Hope this helps !
Rust forms when the iron is exposed to water and oxygen.
True
False
Answers
explanation:
i looked it up
Answer: true
Explanation:
The statement that "Newton knew what gravity did but he could not explain why gravity did it is the basic difference between?
A. A scientific law and a scientific theory
B. A scientific theory and a societal law
C. A scientific law and societal law
D. A hypothesis and scientific law
Answers
B. A scientific theory and a societal law
Newton's law states that:
Newton's law of universal gravitation is usually stated as that every particle attracts every other particle in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.Newton could not explain:
Newton could describe gravity, but he didn't know how it worked. In Principia, Newton described gravity as an ever-present force, a tug that all objects exert on nearby objects. The more mass an object has, the stronger its tug. Increasing the distance between two objects weakens the attraction.Thus, correct option is B i.e. the difference between a scientific and societal law.
Learn more:
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Can you guys help me I have missing assignments and I need help.
Answers
PLeas hurry
Which of the following matches a human action with its impact?
Construction of dam : Scarcity of water for animals
Use of fertilizers : Increase in the population of aquatic animals
Decrease in honeybee population : Increase in plant population
Construction of roads : Improvement in quality of water in local lakes
Answers
Answer:
construction aka A
Explanation:
got 100
A 13.9 - g piece of metal ( specific heat capacity is 0.449 /g^ C)who whose temperature is 54.2 degrees * C was added to a sample of water at 13.4 degrees * C in a constant - pressure calorimeter of negligible heat capacity . If the final temperature of the water is 15.6 °C, calculate the mass of the water in the calorimeter .
Answers
Answer:
26.2g = Mass of water in the calorimeter
Explanation:
The heat absorbed for the water is equal to the heat released for the metal. Based on the equation:
Q = m*C*ΔT
Where Q is heat, m is the mass of the sample, C is specific heat of the material and ΔT is change in temperature
Replacing we can write:
[tex]m_{metal}*C_{metal}*dT_{metal}=m_{water}*C_{water}*dT_{water}[/tex]
13.9g * 0.449J/g°C * (54.2°C-15.6°C) = m(H₂O) * 4.184J/g°C * (15.6°C-13.4°C)
240.9J = m(H₂O) * 9.2J/g
26.2g = Mass of water in the calorimeterWhich statement below BEST describes the difference between mixtures and pure substances? Group of answer choices Mixtures are made of a single kind of matter but a pure substance is two or more substances that are chemically bonded. Pure substances can be physically separated but mixtures cannot be physically separated. Pure substances are not created through a chemical reaction and mixtures are the result of a chemical reaction. Mixtures can be physically separated but pure substances cannot be physically separated.
Answers
Answer: Mixtures can be physically separated but pure substances cannot be physically separated.
Explanation: Mixtures can be physically separated by using methods that use differences in physical properties to separate the components of the mixture, such as evaporation, distillation, filtration and chromatography. A pure substance, any compound or element, can't be separated into different atoms by physical methods. Pure substances are compounds and elements (made up of the same atom or same molecule respectively), while mixtures are an assortment of different substances put together. Hope this helps ^-^.
Pure substances cannot be physically separated but mixtures can be physically separated. Therefore, option (4) is correct.
What are a mixture and pure substance?Pure substances such as elements cannot be created by chemical reactions and cannot be broken down into simple substances. They have only one type of atom in the entire composition.
A pure substance consists of two or more elements that are chemically combined and has a fixed composition such kind of pure substance is called a compound. Pure substances can not be physically separated such as gold, silver, copper, etc.
A mixture is formed when two or more different substances are only physically combined or mixed together. They are not formed by the chemical reaction so that a mixture can be separated physically into its original components.
A mixture cannot be formed from a single type of matter even a homogeneous mixture has two or more types of substances but the composition of the substance in the entire mixture is always the same.
Learn more about mixture and a pure substance, here:
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Step 7: Determine the Limiting Reactant (Trial 2)
50
Analysis: The limiting reactant(s) appeared to be
because ...
Answers
Answer:
aluminum
no aluminum is left over
Explanation:
the next answers for step 7 are 0.019, 0.0093, aluminum
Answer:
Aluminum because no aluminum is left over
Explanation:
please helppp!!
How do ion charges differ
for the fourth main group
column and the transition
metals?
Answers
Answer:
How do ion charges differ for the fourth main group column and the transition metals? Do not have common charges. Transition metals tend to form positive ions, but the number of electrons that are lost varies. Describe how atoms with a large difference in electronegativity form ionic bonds.
Explanation: ?
Coffee is an example of a
Answers
Answer:
I think it is mixture and of chemical reaction
What does microbiome do to your cells?
Answers
A vernier calipers are more precise than metre rule
True
False
Answers
Answer:
true
Explanation:
Vernier caliper can give exact measurements in mm.
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A 5.0 g sample of metal was heated to a temperature of 100.0 °C then placed into a calorimeter containing 35 mL of water at 20.0°C.
The final temperature was 26.5°C What is the specific heat capacity of the metal?
Answers
The specific heat capacity of the metal : c = 2.59 J/g °C
Further explanationGiven
5 g sample
35 ml water = 35 g
Required
The specific heat capacity of the metal
Solution
Heat can be formulated :
Q = m.c.Δt
Q in = Q out
Q absorbed = Q released
Q water = Q metal
35 g x 4.184 J/g °C x (26.5-20)= 5 x c x (100-26.5)
951.86 J = 367.5 x c
c = 2.59 J/g °C
Can someone help me determine the name of the formula
Answers
SnI2 is Tin(II) Iodine
Sni4 is Tin
SnS is Tin(II) Sulfide
SnS2 is Tin Sulfide
Q1; ___________ have almost half a set of electrons in the outer most energy level.
1- metalloids
2- metals
3- nonmetals
Q2;________ are known to be gasses at room temperature.
1- nonmetals
2- metalloids
3- metals
Answers
Answer:
2 metalliods....
1 metals
Which statement describes the conditions in which diamonds form?
A.they form deep underground, in certain areas that are under a great deal of pressure.
B.they form as water evaporates on the shores of very salty bodys of water.
C.They form as water evaporates on the shore of any body of water.
D.they form deep underground, in most regions of earth.
Answers
Answer:
b for sure
Explanation:
Help due at 11:59 I really need to pass this year
Answers
Answer:
i think its eye color
hope its right and this helps
what is selection in science?
Answers
Answer:
Selection, in biology, the preferential survival and reproduction or preferential elimination of individuals with certain genotypes (genetic compositions), by means of natural or artificial controlling factors.
Explanation:
Hope it helps you
Natural selection, process that results in the adaptation of an organism to its environment by means of selectively reproducing changes in its genotype, or genetic constitution.
At what temperature will equal masses of HCl and NH4CI dissolve in 100g water?
Answers
Explanation:
NH4Cl at 90°C _.70 a ... m aximum amount of solute that will dissolve at that specific temperature (no ... A mass of 100 g of NaNO3 is dissolved in 100 g of water at 80°C. Is the ... SO2, NH3, HCl.
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what is the mass of 5.8 moles of H2S
Answers
Answer:
Mass = 197.78 g
Explanation:
Given data:
Number of moles = 5.8 mol
Mass of H₂S = ?
Solution:
Formula:
Mass = number of moles × molar mass
molar mass of H₂S = 34.1 g/mol
by putting values,
Mass = 5.8 mol × 34.1 g/mol
Mass = 197.78 g
Thus, 5.8 moles of H₂S have 197.78 g mass.
The combination of all the forces on an object is called?
Answers
Answer:
net force
Explanation:
4. List if each of the following data is qualitative or quantitative:
a. ________________ Green
b. ________________ 5.7 grams
c. ________________ Large
d. ________________ 120 lbs
Answers
Explanation:
a. qualitative
b. quantitative
c. quantitative
d. quantitative
Hope this helps you.