The empirical formula of the carboxylic acid is C₃H₆O₂.
For determination of the empirical formula of the carboxylic acid.
As you know, one mole of water, contains 2 moles of hydrogen. This means that the percent composition of hydrogen in water will be
2× 1.00794 g/mol / 18.015 g/mol × 100 = 11.19% H
What this means is that every 100 g of water will contain 11.19 g of hydrogen. In your case, the 0.2349-g sample of water will contain
0.2349 g water⋅ 11.19 g H / 100 g water = 0.026285 g H
Similarly, one mole of carbon dioxide, CO₂, contains one mole of carbon. The percent composition of carbon in carbon dioxide will be
1 ×12.011 g/mol / 44.01 g/mol × 100 = 27.29% C
Once again, this tells you that every 100 g of carbon dioxide will contain
27.29 g of carbon. In your case, you will have
0.5706g H₂O ⋅ 27.29 g C /100g H₂O = 0.15572 g C
The mass of carbon + hydrogen originally present in the carboxylic acid sample will be
m C + H = 0.026285 g + 0.15572 g =0.18201 g
The initial mass of the sample was equal to 0.3200 g. This tells you that the sample also contains oxygen
m oxygen = 0.3200 g −0.18201 g = 0.13799 g O
So, now that you know how many grams of each element were present in the initial sample, use their molar masses to convert these to moles
For C: 0.15572g /12.011g/mol = 0.012965 moles C
For H: 0.026285 g/1.00794g/mol = 0.026078 moles H
For O: 0.13799g/15.9994g/ mol = 0.0086247 moles O
Now, to get the compound's empirical formula, you need to find the smallest whole number ratio that exists between the number of moles of each element in the compound.
To do that, divide these values by the smallest one to get
For C: 0.012965 moles / 0.0086247 moles = 1.5032 ≈ 1.5
For H: 0.026078moles /0.0086247 moles =3.0236≈ 3
For O: 0.0086247moles /0.0086247 moles = 1
This means that you have
C₁.₅H₃O₁
Since you're looking for the smallest whole number ratio that exists between the elements, multiply each subscript by 2 to get
C₁.₅H₃O₁ * 2 = C₃H₆O₂
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A liquid solvent is added to a flask containing an insoluble solid. The total volume of the solid and liquid together is 90.0 mL. The liquid solvent has a mass of 47.3 g and a density of 0.865 g/mL. Determine the mass of the solid given its density is 3.25 g/mL.
The mass of the solid will be 114.7 g.
Density problemThe density of a substance is given as the ratio of its mass and its volume.
Also, a solid will always displace its own volume in a liquid.
Mass of liquid solvent = 47.3 g
Density of liquid solvent = 0.865 g/mL
Recall that: density = mass/volume
Volume of liquid solvent = mass/density
= 47.3/0.865
= 54.7 mL
Volume of solid + liquid solvent = 90.0 mL
Volume of solid = 90.0 - volume of liquid solvent
= 90.0 - 54.7
= 35.3 mL
Density of solid = 3.25 g/mL
Mass of solid = density x volume
= 3.25 x 35.3
= 114.7 g
The mass of the solid is 114.7 g.
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A student is given a metal block and told to calculate the density of the object. The student measures the block on each side (LxWxH) 4 times each.
He then calculates the average measurement for each side. Those average values are:
Average Length = 6.51 cm
Average Width = 4.34 cm
Average Height = 7.17 cm
Calculate the volume of the block
to be rounded to the nearest supported value)
cm^3 (Select the answer closest to what you calculated. Significant Figures requires all answer
The volume of the metal block is 201 [tex]cm^3[/tex]
What is average volume?The volume of an object is the multiplication of all the sides of the object.
The average volume, on the other hand, is the multiplication of the average sides of objects.
In this case, the object has length, width, and height.
Average length = 6.51 cm
Average width = 4.34 cm
Average height = 7.17 cm
Volume of the metal block = 6.51 x 4.34 x 7.13
= 201 [tex]cm^3[/tex]
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calculate denisty in grans per milliliter 25.0 mL having a mass of 19.7 g
Maalox is the trade name for an antacid and antigas medication used for relief of heartburn, bloating, and acid indigestion. Each 4−mL portion of Maalox contains 320 mg of aluminum hydroxide, 320 mg of magnesium hydroxide, and 32 mg of simethicone. If the recommended dose is two teaspoons four times a day, how many grams of each substance would an individual take in a 12−hour period. (1 teaspoon = 5 mL.)
Maalox is the trade name for an antacid and antigas medication used for relief of heartburn, bloating, and acid indigestion in which
4 ml contains
= 320mg of aluminum hydroxide
= 320mg of magnesium hydroxide
= 32mg of simethicone
recommended doses = 4 times * 2 tea spoon = 8 tea spoon/ day
given = 1 tea spoon = 5 ml
8 tea spoon = 40 ml
hence,
amount of aluminum hydroxide = 320/4 * 40 = 3200mg = 3.2 g
amount of magnesium hydroxide = 320/4 * 40 = 3.2 g
amount of simethicone = 32/4 * 40 = 320 mg = 0.32g
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This is science not Chemistry
In the following illustration what do you call location (a) and location (b)?
Answer:
you can do it shshbssjjsjsnsjssbsjsb
who said electrons move around the nucleus billions of times in one second
Answer:
it's Heisenberg Einstein
Explanation:
Heisenberg Einstein & other scientists
Electrons move around the nucleus billions of times in one second. There are small, negatively charged particles inside an atom called electrons. “Atomos” means “not to be cut,” which refers to the smallest piece of matter.
Answer:
Heisenberg Einstein
Explanation:
they where the main one but there where a few others who agreed
D) Chemical, Reactivity
Physical or Chemical Change? Why? Iron reacts with Sulphur to give heat and a flame.
(A) Chemical, Smell/Taste
B) Chemical, Color/Sight
c) Chemical, Combustibility/Reaction
D) Physical, Color
c) Chemical, Combustibility/Reaction Iron reacts with Sulphur to give heat and a flame.
What happens when you heat iron and sulphur together?Iron sulphide, a chemical, is created when you burn iron and sulphur together. A series of chemical compounds comprised of iron and sulphur is referred to as iron sulphide, or simply iron sulphide. The chemical molecule and mineral known as iron sulphide, sometimes known as iron(II) sulphide, has the formula FeS.
Incandescence is the process of a solid emitting light after being heated till it glows or emits light. The colour of an iron bar when warmed to a very great temperature changes from red to white as the temperature increases.
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what distance in miles can you drive in your new Prius hybrid, if your car gets 56 miles per gallon and you have 15.5 gallons of gas?
Taking into account the rule of three, you can drive your new Prius hybrid a distance of 868 miles.
Rule of threeRule of three is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them.
If the relationship between the magnitudes is direct, the direct rule of three must be applied as follow, being a, b and c known data and x the variable to be calculated:
a ⇒ b
c ⇒ x
So: x= (c×b) ÷a
Distance in miles in this caseIn this case, you can apply the following rule of three: If the car for 1 gallon of gasoline gets 56 miles, for 15.5 gallons of gasoline it gets how many miles?
1 gallon ⇒ 56 miles
15.5 gallons ⇒ x
So: x= (15.5 gallons ×56 miles) ÷1 gallon
Solving:
x= 868 miles
In summary, you can drive your new Prius hybrid a distance of 868 miles.
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