In the experiment, the use of the ammonia/ammonium chloride buffer is crucial. It is important to add enough buffer to reach pH 10 because the buffer will stabilize the pH of the solution.
In this experiment, the ammonia/ammonium chloride buffer is utilized to maintain the pH level of the solution when a base, such as NaOH, is added. The buffer is able to do this because it contains both a weak acid (ammonium ion, NH4+) and its conjugate base (ammonia, NH3).
When a base is added to the solution, it will react with the ammonium ions present in the buffer to produce ammonia, which will then react with any excess base added. By doing so, the buffer can help keep the pH of the solution from becoming too basic. When the pH is too low, the solution can become too acidic, which can have a negative impact on the results of the experiment. Conversely, if the pH is too high, the solution can become too basic, which can also impact the experiment's results. Thus, it is important to add enough ammonia or ammonium chloride buffer to maintain a pH of 10 throughout the experiment.
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One example of a chemical change is
Ions bonds are strong?
True or False
Answer:
Ture
Explanation:
Answer:
true
Explanation:
ions bond are those bonds which are made with the exchange of electrons between metals and nonmetals.Thus they are very strong.
is this correct im so confused.
Answer:
the last option!!!!
Explanation:
because its right
how many molecules are contained in 0.254 moles of diarsenic trioxide
Answer:
1.53 × 10²³ molecules As₂O₃
Explanation:
Step 1: Define
Diarsenic Trioxide - As₂O₃
Avagadro's number: 6.02 × 10²³ atoms, molecules, formula units, etc.
Step 2: Use Dimensional Analysis
[tex]0.254 \hspace{3} mol \hspace{3} As_2O_3(\frac{6.02(10)^{23} \hspace{3} molecules \hspace{3} As_2O_3}{1 \hspace{3} mol \hspace{3} As_2O_3} )[/tex] = 1.52908 × 10²³ molecules As₂O₃
Step 3: Simplify
We have 3 sig figs.
1.52908 × 10²³ molecules As₂O₃ ≈ 1.53 × 10²³ molecules As₂O₃
What is measurement without a unit
Answer: Dimensionless
Explanation: A measurement without units is termed “dimensionless”
Hope this helped! :)
Answer:
A measurement without units is termed dimensionless.
Explanation:
Any units used in other system of measurement will be referred to as non-SI units.
I hope this makes sense and helps!
What tool best allows you to make observations of an objects color and texture? Balance Scale, Digital Camera, Digital Thermometer, or a Graduated Cylinder? I’ll give you 10 points!
Answer:
digital camera
Explanation:
1. The radius of a Cl nucleus is 4.0 fm, and the radius of a Cl atom is 100 pm. (1
fm = 1x 10-15 m; 1 pm = 1 x 10-12 m).How many times larger is the diameter
of the Chlorine atom than the diameter of the Chlorine nucleus?
Answer:
The diameter of the Chlorine atom is 25000 times larger than the diameter of the Chlorine nucleus.
Explanation:
From the question,
The radius of a Cl nucleus is 4.0 fm and radius of a Cl atom is 100 pm.
To determine how many times larger the diameter of the Chlorine atom is than the diameter of the Chlorine nucleus,
First, we will determine the diameter of the Chlorine atom and the diameter of the Chlorine nucleus.
(NOTE: Diameter = Radius × 2)
For the Chlorine atom
Radius of the Chlorine atom = 100 pm
∴ Diameter of the Chlorine atom = 2 × 100 pm
Diameter of the Chlorine atom = 200 pm
For the Chlorine nucleus
Radius of Chlorine nucleus = 4.0 fm
∴ Diameter of the Chlorine nucleus= 2 × 4.0 fm
Diameter of the Chlorine nucleus = 8.0 fm
Now, we will convert both diameters ( diameter of Chlorine atom and diameter of Chlorine nucleus) to the same unit
For Chlorine nucleus
Diameter of the Chlorine nucleus = 8.0 fm
If 1 fm = 1 × 10⁻¹⁵ m
Then, diameter of the Chlorine nucleus = 8.0 × 1 × 10⁻¹⁵ m
Diameter of the Chlorine nucleus = 8.0 × 10⁻¹⁵ m
For Chlorine atom
Diameter of the Chlorine atom = 200 pm
If 1 pm = 1 × 10⁻¹² m
Then, diameter of the Chlorine atom = 200 × 1 × 10⁻¹² m
Diameter of the Chlorine atom = 200 × 10⁻¹² m
Diameter of the Chlorine atom = 2 × 10⁻¹⁰ m
Now, to determine how many times larger the diameter of the Chlorine atom is than the diameter of the Chlorine nucleus, we will divide the diameter of the Chlorine atom by the diameter of Chlorine nucleus.
Diameter of Cl atom / Diameter of Cl nucleus = (2 × 10⁻¹⁰ m) / (8.0 × 10⁻¹⁵ m)
(2 × 10⁻¹⁰ m) / (8.0 × 10⁻¹⁵ m) = 25000
∴ Diameter of Cl atom / Diameter of Cl nucleus = 25000
Hence, the diameter of the Chlorine atom is 25000 times larger than the diameter of the Chlorine nucleus.
The diameter of the Cl atom has been 25,000 times larger than the diameter of the Cl nucleus.
To calculate the relationship between the diameter of Cl atom and nucleus, the diameter has to be calculated.
Diameter = 2 [tex]\times[/tex] radius
Diameter of Cl atom:
Cl atom = 2 [tex]\times[/tex] 100 pm
Cl atom = 200pm
1 pm = [tex]\rm 10^-^1^2[/tex] m
200 pm = 200 [tex]\times[/tex] [tex]\rm 10^-^1^2[/tex] m
Diameter of Cl nucleus:
Cl nucleus = 2 [tex]\times[/tex] 4 fm
Cl nucleus = 8 fm
1 fm = [tex]\rm 10^-^1^5[/tex] m
8 fm = 8 [tex]\times[/tex] [tex]\rm 10^-^1^5[/tex] m.
The relationship between the Cl atom and the nucleus has been made by taking the ratio of the diameter of the Cl atom to the Cl nucleus.
[tex]\rm \dfrac{Diameter\;of\;Cl\;atom}{Diameter\;of\;Cl\;nuclues}\;=\;\dfrac{200\;\times\;10^-^1^2}{8\;\times\;10^-^1^5}[/tex]
Diameter of Cl atom = 25000 Diameter of Cl nucleus.
Thus, the diameter of Cl atom has been 25,000 times larger than the diameter of the Cl nucleus.
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Which of the following is NOT a unit energy? (select all that applies)
Kelvin
Kelvin
calories
calories
Celsius
Celsius
Fahrenheit
Fahrenheit
joules
Answer:
Kelvin, Celsius, Fahrenheit
Explanation:
See my other answer for an explanation.
Joules, Kelvin and Calories
Will give brainliest
Answer:
you said you will give brainliest sooooo hello!!!
Explanation:
you promised... UwU anyways have a great day!
Answer: Coefficient (green) = 1.586
Exponent (yellow) = -9
Explanation:
Standard form = 1.586 × 10-9
I'm only like 2 years late to this answer also the person above me is very useless and cringe
What type of reaction is this?
The sum of protons and neutrons in the nucleus of an atom is called the
Answer:
The mass number.
Explanation:
Answer:
electrons and the mass number
Explanation: Because the neutrons and protons are added together
11.Name the elements in period 4 that are no metals
Answer:
(Se) Selenium
(Se) is an element in group 16. Selenium is the first nonmetal in period 4.
You arrive at science class in 45.0 seconds after running 90 m from math what is your speed
Answer:
1/2 a second per meter
Explanation:
Hope this helps!
What do we mean when we say a chemical reaction is balanced? (Several choices can be correct.)
There is an equal number of solids, liquids, and gases on both sides of the reaction arrow.
There is an equal number of products on the right side of the equation as there are reactants on the left side of the
arrow.
The total number of each atom is the same on both sides of the reaction arrow.
The net charge on both sides of the reaction arrow is the same.
Answer:
2 and 3
Explanation:
A chemical reaction is defined as the process in which two or more reactants combined together chemically and gives a different product.
A balanced chemical equation involves an equal number of atoms on the reactant and product side. A balanced chemical reaction occurs when the atoms present on the reactant side or left side of the arrow is equal to the atoms on the product side or right side of the arrow.
The process of the balanced chemical equation is based on errors and trials in which the atoms in each element is identified, the atoms are then multiplied with required numbers, the addition of coefficient in front of molecules and check the equation at last.
Hence, the correct options are "2 and 3".
Preform the following calculations and round your answers to the correct number of
significant figures.
12.0 g / 0.0034 mL =
Answer:
3 529 411.76 kg / m3
Explanation:
The atmospheric pressure on a mountain is 500 mmHg and 1 atm is equal to 760 mmHg. What is the pressure in atm?
Answer:
≈ 0.6579 atm
Explanation:
The pressure in atmospheres is the ratio of the pressure on the mountain to one atmosphere, in corresponding units.
The pressure is ...
500 /760 atm = 25/38 atm ≈ 0.6579 atm
What's the chemical formula for disulfur decafluoride?
Answer:
I think it is this:
S₂F₁₀
Hope this helps :)
Why isn't the atomic mass of most of the elements on the Periodic Table an integer (not a decimal)?
Answer:
Atomic mass is never an integer number for several reasons
How many total atoms in the compound Al3NO2
Answer:
1 mole of aluminum must contain 6.022⋅1023 atoms of aluminium → this is known as Avogadro's constant.
Explanation:
Answer:
[tex]6.02 \times {10}^{23} \: atoms[/tex]
Explanation:
since every compound is equivalent to one mole of particles. This number is represented by avagadros constant which represents the atomic proportion from molar to physical mass on a human scale. This equates to the amount of particles per mole of substance(amount of substance).
[tex]6.02 \times {10}^{23} \: {mol}^{ - 1} [/tex]
this can be denoted in symbol form by
[tex]N_A[/tex]
avagadros constant is defined as rational so the exact value is 6.02214076×10^23.
avagadros number : 1 mole
radio stations broadcast signals on two different frequency bands these are called _____ and ____
Answer: AM and FM frequency
Explanation:
Which element has 4 energy levels and 2 valence electrons?
Answer:
Beryllium
Explanation:
The element that has 4 energy levels and 2 valence electrons is Beryllium.
What is a Beryllium?Beryllium is a chemical element that comes in the second row and is an alkaline earth metal.
It is silvery-white, and very brittle at room temperature.
Its properties are similar to aluminum.
It has two valence electrons in the k shell and two in L shell.
Thus, the correct element is Beryllium.
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Which of these most directly affects what happens to white light when it hits an object?
the properties of the object
the source of the light
the speed at which the light travels
the distance of the object from the light
Answer:
the answer is a is got it right on engdenuity
Explanation:
The fact that most directly affects what happens to white light when it hits an object is the properties of the object.
What is white light?White lighte is that light which conatins all the colors of the vissible spectrum in it.
As a result, the behavior of white light is determined by the qualities of the thing it strikes. When white light strikes an item and all of the light wavelengths are reflected, we see a white color. And if we are able to see any color of an object then because of the fact that given object will reflect only that color and absorb other all.
Hence the properties of the object directly affects the effect of white light.
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what is the metal that is grouped with metalloids
Answer:
The post-transition metals cluster to the lower left of this line. Metalloids: The metalloids are boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po). They form the staircase that represents the gradual transition from metals to nonmetals.
Explanation: i googled it
The metal that is grouped with metalloids are
boron, silicon, germanium,arsenic, antimony, and tellurium.A metalloid is a type of element which possesses the characteristics of both the metals and the non-metals.
Metals are those elements that are good conductors of heat and electricity while non-metals are those elements that neither conducts heat nor electricity.
The characteristics of the metalloids listed above are:
They conduct heat only at higher temperatures. The metalloids that can conduct electricity are called semi-conductors.They are shiny like metals but brittle like non-metals.Therefore, since these elements share both the properties of metals and non-metals, they are called the metalloids.
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Based on the tiles shown, how many meters per second is equivalent to 72 kilometers per hour?
Answer:
10 kilometers per hour
Explanation:
Determine the number of atoms in the following chemical formula: Ba(OH)2
Answer:
5
Explanation:
Ba,1 O,2 H,2
the somes are 5
Which one of these is not one of the 7 characteristics of all organisms?
•able to reproduce
•able to maintain homeostasis
•able to produce its own food
•able to respond to stimulus
Answer its most likely going to be b. but it could also be d.
Explanation:
What is the balanced equation that represents the reaction between hydrogen and nitrogen to make ammonia (NH3)?
Answer:
Balanced chemical equation:
N₂ + 3H₂ → 2NH₃
Explanation:
Chemical equation:
N₂ + H₂ → NH₃
Balanced chemical equation:
N₂ + 3H₂ → 2NH₃
Step1:
Left side of equation Right side of equation
N = 2 N = 1
H = 2 H = 3
Step 2:
N₂ + H₂ → 2NH₃
Left side of equation Right side of equation
N = 2 N = 2
H = 2 H = 6
Step 3:
N₂ + 3H₂ → 2NH₃
Left side of equation Right side of equation
N = 2 N = 2
H = 6 H = 6
The balanced equation of the reaction between hydrogen and nitrogen to produce ammonia would be: [tex]N_2 + 3H_2 --->2 NH_3[/tex]
Ammonia is produced when nitrogen reacts with hydrogen.
Stoichiometrically, 1 mole of nitrogen is required to react with 3 moles of hydrogen with 2 moles of ammonia being the product.
Thus, the balanced chemical equation for the reaction would become:
[tex]N_2 + 3H_2 --->2 NH_3[/tex]
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What volume would a 200-gram sample of gold have if its density is known to be 19.3 g/mL?
Answer:
The answer is 10.36 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\[/tex]
From the question
mass of metal = 200 g
density = 19.3 g/mL
So we have
[tex]volume = \frac{200}{19.3} \\ = 10.3626943...[/tex]
We have the final answer as
10.36 mLHope this helps you
Colin is visiting his grandparents at the beach. While walking on the beach, 17
he notices the tide pools that are left behind when the ocean recedes.
Which of the following explains the cause of tides?
How many milligrams are equal to 0.0265 pounds?
(Dimensional Analysis)
Please show how you got that answer.
Answer:
37.73 pounds
Explanation:
just trust me.
