[tex] \large \text{Answer} \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ [/tex]
If you rinse the burette with the solution to be used, then any tiny amounts of liquid remaining are the same as the solution used to fill the burette, so they will not change the concentration of the solution in any way. This is to prevent contamination.
~⭐Hope it helps you ⭐~
A compound is 2. 00% H by mass, 32. 7% S by mass, and 65. 3% O by mass. What is its empirical formula? The first step is to calculate the mass of each element in a 100-g sample of the compound. We use 100 g because it makes the calculations more straightforward. What is the mass of each element in a 100. 0-g sample of the compound? mass H = g mass S = g mass O = g.
Answer:
We assume that there is 100g of the compound (because it makes it easier to calculate) and we turn the percentages into grams.
2% of Hydrogen = 2g of H
32.7% of Sulfur = 32.7g of S
65.3% of Oxygen = 65.3g of O
Now we change the mass of these elements to moles by dividing the mass by the molar mass (which is the value of atomic mass on your periodic table)
2g/1.01g = 1.98 mol
32.7g/32.06g = 1.02 mol
65.3g/16g =4.08 mol
divide all these mol values by the smallest mol value, which is 1.02. (Round the values to whole numbers)
1.98/1.02 = 2 (rounded) of Hydrogen
1.02/1.02 = 1 of Sulfur
4.08/1.02 = 4 of Oxygen
H2SO4 (also known as sulphuric acid) is your empirical formula.
A tiny crystal of a solid substance is added to an aqueous solution of the same substance. What would happen if the original solution was: 1) Super saturated 2) Unsaturated 3) Saturated.
Answer:
3.)Saturated
Explanation:
it was saturated and then turned super saturated
This element has an atomic number lower than aluminum and is in group 14
Answer:
that is impossible. the atomic number can only go up each group
why does a diprotic acid dissociate in a stepwise manner
Because they have the ability to supply exactly two protons.
Hope this helps!
A diprotic acid dissociates in a step wise manner as it has two protons and it looses one proton each in each dissociation step.
What are acids?Acids are defined as substances which on dissociation yield H+ ions , and these substances are sour in taste. Compounds HCl, H₂SO₄ and HNO₃ are acids as they yield H+ ions on dissociation.
According to the number of H+ ions which are generated on dissociation acids are classified as mono-protic , di-protic ,tri-protic and polyprotic acids depending on the number of protons which are liberated on dissociation.
Acids are widely used in industries for production of fertilizers, detergents batteries and dyes.They are used in chemical industries for production of chemical compounds like salts which are produced by neutralization reactions.
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answer this step by step pls
Answer:
neutrons = mass number - atomic number
. = 39-19 =20
The line "Come, I will make the continent indissoluble" from "For You O Democracy" implies democracy will make the nation stronger than ever before. Given this, what is most likely the meaning of indissoluble?.
Answer:
Permanent
Explanation:
I took the text
How does the microscopic arrangement of particles affect the microscopic behavior of the solution?
Answer:
In a solid, the particles pack together as tightly as possible in a neat and ordered arrangement. ... With an increase in temperature, the particles gain kinetic energy and vibrate faster and more strongly. The attractive force in solids need not be stronger than in liquids or gases
1. What are five examples of observable properties?
The equation shows a neutralization reaction. H2SO4 2NaOH Na2SO4 2H2O What is Na2SO4? an acid a base a salt an ion.
A gas held in a balloon at 5L has its temperature doubled. What will the new volume of the balloon be?
Answer:
2.5l
Explanation:
They higher the temprature the higher the volume
is a single cell the smallest structure that carries out our activities nesscesary for life
yep, the cell is the smallest unit in a living organism that is capable of carrying out all of the activities of life.
Which describes a molecule? (Select all that apply.)
It can be two or more different elements combined.
It can be two or more of the same elements combined together.
It can be one element by itself.
It can be the combination of different neutrons.
Answer:
All of them
Explanation: A molecule can be all of them
how long does it take for food poisoning to show up?
Answer:
with in one to two days of
How many elements are in the other metals group
Answer:
7 elements
Explanation:
Answer:
There are 7 elements
Explanation:
What are their name?
Answer: Ch3 is Methlene Ch2 is Methyl Ch is Benzen
Explanation:
Hope this helps
Give one example of a pure substance.
Answer:
some example includes:
gold, copper, oxygen, chlorine, diamond
Explanation:
a stone is projected horizontally with 20 metre per second from the top of a tall building calculate its position in velocity after 3 seconds neglecting the air resistance .
Answer:
105m
Explanation:
u=20m/s
g=10m/s^2
t=3s
s=ut+1/2gt^2at
s=20*3+1/2*10*3*3
s=105m
Solve the following problems to determine the empirical formula. Show the complete
factors to calculate number of moles, then the molar ration and finally the empirical formula.
1. Calcium bromide is a compound used in photography and the manufactur of fire extinguishing
materials. Analysis of a 20.00 gram sample of calcium bromide yields 4,02 grams of calcium and
15.95 grams of bromine. Calculate the number of moles of both calcium and bromide, then
determine the mole ratio to write an empirical formula for calcium bromide,
The empirical formula of the compound (calcium bromide) is CaBr₂
From the question given above, the following data were obtained:
Ca = 4.02 g
Br = 15.95 g
Empirical formula =?Divide by their molar mass to obtain their mole
Ca = 4.02 / 40 = 0.1005 mole
Br = 15.95 / 80 = 0.199 mole
Divide by the smallest to obtain the mole ratio
Ca = 0.1005 / 0.1005 = 1
Br = 0.199 / 0.1005 = 2
Therefore, the empirical formula of calcium bromide is CaBr₂
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What is the density of a bowling ball with a mass of 3.0 kg and a volume of 0.0050 m 3 ?
0.002 kg/m 3
0.015 kg/m 3
500 kg/m 3
600 kg/m 3
Answer:
600 kg/m³
Explanation:Formula to used = m/v
[] d is the density
[] m is the mass
[] v is the volume
Solving[Formula] d = m/v
[Plug-in] d = 3/0.0050
[Divide] d = 600 kg/m³
Answer0.002 kg/m³
0.015 kg/m³
500 kg/m³
600 kg/m³
Have a nice day!
I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)
- Heather
Answer:
[tex]\boxed {\boxed {\sf 600 \ kg/m^3}}[/tex]
Explanation:
We are asked to find the density of a bowling ball. The density of an object is its mass per unit volume. It is calculated by dividing the mass by the volume.
[tex]\rho= \frac{m}{v}[/tex]
The mass of the bowling ball is 3.0 kilograms and the volume is 0.0050 cubic meters.
m= 3.0 kg v= 0.0050 m³Substitute the values into the formula.
[tex]\rho= \frac{3.0 \ kg}{0.0050 \ m^3}[/tex]
Divide.
[tex]\rho= 600 \ kg/m^3[/tex]
The density of the bowling ball is 600 kilograms per cubic meter.
why would someone need to find the relative density of an object?
Answer:
The relative densities of an object and the liquid it is placed in determine whether that object will sink or float. An object that has a higher density than the liquid it's in will sink. An object that has a lower density than the liquid it's in will float.
Explanation:
Hope it helps!
The relative densities of an object and the liquid it is placed in determine whether that object will sink or float. An object that has a higher density than the liquid it's in will sink. An object that has a lower density than the liquid it's in will float.
This principle is fundamental to understanding why objects float or sink in fluids and are commonly observed in everyday situations. For example, ships and boats float on water due to their design and the distribution of weight, while heavy materials like metal sink in water because their density is greater than that of water.
Therefore, The concept of relative densities and buoyancy has significant applications in various fields, including shipbuilding, architecture, swimming, and understanding the behavior of objects in liquids.
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I had graduated cylinder with 50 mL of water. I added a rock to the graduated cylinder and the water level rose to 56 mL. What is the VOLUME of the rock?
how spectral lines are formed
=Spectral lines are produced by transitions of electrons within atoms or ions. As the electrons move closer to or farther from the nucleus of an atom (or of an ion), energy in the form of light (or other radiation) is emitted or absorbed.…
Answer:
Spectral lines are produced by transitions of electrons within atoms or ions
how is the mode of data set defined
it is the middle value of the set
Answer:
No, mode isnt the middle value of a set that is median.
Explanation:
Mode (also known as modal class) is the value that appears most frequently in a data set.
how many of the following elements have 2 unpaired electrons in the ground state?
Answer:
I'll h he d Glendale https hehe
Explanation:
grendel v BB hehe iron v
A solution of the ionic salt
Lihco3 would have ____ pH.
ANSWER : BASIC
A solution of the ionic salt Lihco3 would have 11.3 pH.
What is ionic salt ?In chemistry, salt exists as a chemical compound consisting of an ionic group of positively charged cations and negatively charged anions, which results in a combination with no net electric charge. A common example stands table salt, with positively charged sodium ions and negatively charged chloride ions.
The fragment ions in a salt compound can be either inorganic, such as chloride (Cl−), or organic, such as acetate (CH3CO−2). Each ion can be either monatomic, such as fluoride (F−), or polyatomic, such as sulfate (SO2−4).
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Write the balanced COMPLETE ionic equation for the reaction when Na₂CO₃ and AgNO₃ are mixed in aqueous solution. If no reaction occurs, simply write only NR.
Answer:
see explanation
Explanation:
Write the balanced COMPLETE ionic equation for the reaction when Na₂CO₃ and AgNO₃ are mixed in aqueous solution. If no reaction occurs, simply write only NR.
Ag (+1) + NO3(-1) + 2 Na(+1) + Co3 (-2)--> Ag2CO3 (s) + 2 Na (+1) + 2NO3(-1)
An ion of iron has an 26 protons, 30 neutrons, and 23 electrons. What are its atomic number, atomic mass, and net charge?
Answer:
Atomic number: 26
Atomic mass: 56
Net charge: +3
Explanation:
What is the difference between Eukaryote and Prokaryote cells?
why do atmospheric carbon dioxide levels fluctuate during the year?
Answer: The amount of CO2 found in the atmosphere varies over the course of a year. Much of this variation happens because of the role of plants in the carbon cycle
why does C10H22 not conduct electricity
Answer:
Decane doesn't have any free electrons because all the electrons of carbon is used for bonding.