The percentage composition of acetic acid is found to be 39.9% C, 6.7% H, and 53.4% O. What is the empirical formula of acetic acid?
Answer:
CH₂O
Explanation:
From the question given above, the following data were obtained:
Carbon (C) = 39.9%
Hydrogen (H) = 6.7%
Oxygen (O) = 53.4%
Empirical formula =?
The empirical formula of acetic acid can be obtained as follow:
C = 39.9%
H = 6.7%
O = 53.4%
Divide by their molar mass
C = 39.9 / 12 = 3.3
H = 6.7 / 1 = 6.7
O = 53.4 / 16 = 3.3
Divide by the smallest
C = 3.3 / 3.3 = 1
H = 6.7 / 3.3 = 2
O = 3.3 / 3.3 = 1
The empirical formula => CH₂O
Cu2(s)+O2(g)=Cu2O(g)+SO2(g)
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Answer:
2 Cu2S + 3 O2 = 2 Cu2O + 2 SO2
Explanation:
2 Cu2S + 3 O2 = 2 Cu2O + 2 SO2
What type of chemical reaction is
2Al(s) + + 3Cl2(g) – 2AlCl3(s)
Answer:
It's a redox reaction.
Bright red color (R) is dominant over grey color (r) in a type of fish , what color is the fish
The image shows sedimentary rock layers with index fossils and a fault.
Which statement accurately describes the rock layers?
Layer 8 is older than layer 1.
Layer 3 is younger than layer 6.
Layer 4 and layer 10 are the same relative age.
Layer 2 and layer 9 are the same relative age.
Answer:
Layer 2 and layer 9 is the same relative age since it is the same type of rock and has the same fossils.
Hope this helped!
6. Which of the following is not a characteristic of electromagnetic light waves?
O A. They can be reflected and refracted.
O B. They travel at the same speed through any one material.
O C. They can't travel through a vacuum.
O D. They obey the formula velocity = wavelength x frequency
Answer:
B. They travel at the same speed through any one material.
Explanation:
4. How many liters of solution would be needed in a 4.5M solution that contains
101.1g of KNO3?
If the substance in the diagram was heated to T2, what is happening if the substance is allowed to approach T1?
1.The average kinetic energy is decreasing
2. The average kinetic energy has increased
3. The highest energy level has decreased
4. Fewer molecules would have a lower energy level
5. More molecules have a higher energy level
Answer:
b
Explanation:
The following symbol (<-->) means
Answer:
Greater than or less than
Put each equation under the correct heading.
Why are fossils not found in igneous or metamorphic rocks?
Answer:
Because the rock underwent lava and heat/pressure transformation. They are cooled and heated by magma, and then under go pressure. No fossils would be found in those.
Explanation:
Hope this helps! :)
Answer:
Because...
Explanation:
Igneous rock is cooked in extreme hot temperatures.
Metamorphoc is lava cooled downed.
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22 How does Earth's tilt affect climate?
OA. smaller the tilt, the warmer the summer.
OB. The smaller the tilt, the smaller the temperature difference is between summer and winter.
OC. The larger the tilt, the warmer the summer.
OD. The larger the tilt, the smaller the temperature difference is between summer and winter.
4 L of He gas is mixed with 2 L of Ne gas. What is the mole fraction of each component?
moles of He=4 L/22.4 L=0.1786 mol
moles of Ne=2 L/22.4 L=0.0893 mol
total moles of the gas mixture
=0.1786+0.0893
=0.2679 mol
mole fraction of He=0.1786 mol/0.2679 mol=0.6667
mole fraction of Ne=0.0893 mol/0.2679 mol=0.3333
If E is the symbol for an element, which two of the following symbols represent isotopes of the same element?
Answer:
1 and 4
Explanation:
How many cubic centimeters are in the block? if the length is 1, the width is 1 and the height is 1?
Answer:
Volume = [tex]1cm^3[/tex]
Explanation:
Volume of cube = [tex]s^{3}[/tex]
Wherein,
s = length of side
Hence,
If the length of each side is 1cm,
Volume = [tex]1^3[/tex]
= 1[tex]cm^3[/tex]
will gravitational force change based on a change of mass or a change of distance between objects
Answer:
The size of the gravitational force is proportional to the masses of the objects and weakens as the distance between them increases.
1. List 3 physical and chemical phenomena
Answer:
Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding. Often, physical changes can be undone, if energy is input.
Hope this helped.
explain why the constellations in the night sky change with the seasons
Answer:
Explanation:
If observed through the year, the constellations shift gradually to the west. This is caused by Earth's orbit around our Sun. In the summer, viewers are looking in a different direction in space at night than they are during the winter.
why do atoms combine to form compund?
Answer:
See below
Explanation:
The following reasons tell why atom combine to form compounds:
1) They want to follow octet or duplet rule and attain the noble gas configuration.
2) They combine to form compounds because of the electrostatic attraction between them.
3) They form compounds to lower their energy and to become stable.
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH1807a nonliving substance found in earth crust
Answer:
Dirt
mud
rocks
ect.
Explanation:
why is cardboard, paper, or ceramic a better choice for coffee mugs?
Step 4: Model the energy change in the reaction.
a) Create an energy graph that illustrates the energy change in the reaction.
b) Construct your graph on a blank sheet of paper. Be sure to label the axes, provide a title, and
identify the reactants and products on the graph.
Answer:
Sorry if this is hard to see, this was the best I could do, but the top line says C3H8 + O2, and the bottom line says CO2 + H20, with the heat input being -2043.96 kJ/mol
Explanation:
This is correct for me
Which of the following is an oxidation-reduction reaction?
ZnS(s) + 2O2(g) Right arrow. ZnSO4(s)
CaO(s) + H2O(l) Right arrow. Ca(OH)2(s)
6Li2O(s) + P4O10(g) Right arrow. 4Li3PO4(s)
SO2(g) + H2O(l) Right arrow. H2SO3(aq)
Answer:
A: ZnS(s) + 2O2(g) --> ZnSO4(s)
Explanation:
;) good luck
Answer:
The answer is A or the first choice
Explanation:
ZnS(s) + 2O2(g) Right arrow. ZnSO4(s)
HAVE A GREAT DAY STAY SAFE
Light-colored moths blend with light-colored tree bark in their environment. A moth with a dark- colored variation blends with dark-colored tree bark but stands out against light-colored bark. What environmental change would give the dark-colored moth in the picture an adaptive advanage and enhance its survival?
A. The dark-colored moth will have an advantage if it begins to feed at night.
B. If the climate warms, dark-colored moths will absorb more heat.
C. Light-colored moths will be killed more readily if the climate cools.
D. If a change in the environment causes most of the trees to darken, the dark-colored moth will have an advantage.
Emma wrote, 'My investigation was good' , as her conclusion.
Philip said this was not a scientific conclusion.
Explain why Emma's conclusion is not scientific
Answer:
Emma's conclusion is not scientific. She is stating an opinion because she thinks her investigation was good which is not necessarily scientific.
If one mole of nitrogen is used how many liters of hydrogen are needed
Answer:
300
Explanation:
How many liters would 18.0 grams of water vapor occupy at 273 K and 1.00 atm?
Answer:
22.41 Liters
Explanation:
Using the general law equation;
PV= nRT
Where;
P = pressure (atm)
V = volume (L)
n = number of moles (mol)
R = gas law constant (0.0821 Latm/molK)
T = temperature (K)
According to the information provided in this question,
mass of water vapor = 18g
Molar mass of water (H2O) = 1(2) + 16 = 18g.
mole = mass/molar mass
- mole (n) = 18/18 = 1mol
V = ?
T = 273K
p = 1 atm
Using PV = nRT
V = nRT/P
V = 1 × 0.0821 × 273/1
V = 22.41 Liters
Order the items below from largest to smallest size.
ITEM BANK
1 atom of oxygen
1 mole of oxygen
1 molecule of oxygen
3.01 X 1023 atoms of oxygen
4 grams of oxygen
1_
2_
3_
4_
5_
Answer:
1- gram of oxygen, 2- 3.01x1023 atoms of oxygen, 3- 1 molecule of oxygen, 4- 1mole of oxygen, 5- 1atom of oxygen.
calculate the mass of 0.5mols of CH3COOH
Answer:
30 g
Explanation:
In order to convert from moles of CH₃COOH to grams, we need to use its molar mass:
Molar mass of CH₃COOH= (Molar Mass of C)*2 + (Molar Mass of H)*4 + (Molar Mass of O)*2 = 60 g/molNow we convert moles into grams:
0.5 mol * 60 g/mol = 30 gSo 0.5 moles of CH₃COOH have a mass of 30 grams.
How many hours are in 188 years
Answer: about 1,705,536 hrs
24 hrs = 1 day
189 hrs = 1 week
756 = 1 month
9072 = 1 yr
1,705,536 = 188 yrs
Explanation:
Trust Milky. Milky smart