Answer:
The strong acid provides more H+ ion whereas the weak acids produce less H+ in the aqueous solution resulting in less amount of electricity conduction in the solution.
Weak acid- lesser amount of H+ produced
Strong acid- greater amount of H+ ( proton) produced
100 POINTS!!! :0! What two things do all chemical reactions have in common (tick 2)? 1. They create new substances- the substances you end up with are different from the ones you started with. 2. They do not create new substances- the products at the end look exactly the same as the reactants at the start. 3. They are reversible- you can get back the substances that you started with at the end of the reaction 4. They are irreversible- at the end of the reaction, you can't get back the substances you started with
Answer:
1 and 4
Explanation:
Answer:
Explanation:
The answer is 1st and 4th point
hope this helps
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Which of the following is an example of matter?
A. The air around you
B. Your thoughts
C. Radio waves
D. Heat from a fire
Answer:
A. The air around you
Explanation:
The air around us is an example of matter, as it is a gas.
Air has no definite shape/volume and has no definite structure, so it is a gas.
Our thoughts aren't matter because they have no physical atoms, and radio waves and heat waves aren't matter either because they are forms of energy.
a sample of 23.2 grams of nitrogen gas is reacted with 23.2 G of hydrogen gas to produce ammonia. using the balanced equation below predict which of the reactants is the limiting reactant
Answer:
Hydrogen
Explanation:
First thing's first, we have to write out the balanced chemical equation for the reaction.
This is given as;
N2 + 3H2 --> 2NH3
From the stoichiometrey of the reaction;
Molar mass of N = 14
Molar mass of H = 1
(1 * (14 * 2)) = 28g of N2 reacts with (3 * (1 * 2)) = 6g of H2
This means that if there are equal mass of both Nitrogen and Hydrogen. We would run out of Hydrogen first. This means Hydrogen is our limiting reactant as it determines the amount of products that can be formed.
Kool-aid mixes with water is chemical or physical
Answer:
It is a physical change.
Explanation:
Answer:
its a physical change
Explanation:
physical changes no new substance is formed. so in this case it's still water just a change in color
Which sentence represents the inequality -2b + 7 > 27.5? Two times a number, plus seven, is less than twenty-seven and five tenths. Two times a number, plus seven, is greater than twenty-seven and five tenths. Negative two times a number, plus seven, is fewer than twenty-seven and five tenths. Negative two times a number, plus seven, is greater than twenty-seven and five tenths.
Answer:
Negative two times a number, plus seven, is greater than twenty-seven and five tenths.
Explanation:
The given equation is = -2b + 7 > 27.5
Here, let the number be b
2b will be written as two times a number
-2b will be Negative two times a number
+ 7 will be written as plus seven
> is the symbol of greater than
27.5 is written as twenty-seven and five tenths in words.
∴ The equation -2b + 7 > 27.5 will be written as Negative two times a number, plus seven, is greater than twenty-seven and five tenths.
Answer:
D
Explanation:
Which will a positively charged object attract? an object that has a negative charge an object that has a smaller positive charge an object that has no charge an object that has a larger positive charge
Answer:
it will attract an object that has a negative charge
Positively charged objects will attract negatively charged objects.
Law of magnetic attractionsAccording to the law "like charges repel, unlike charges attract', a positively charged substance will repel other positively charged substances.
On the other hand, a positively charged substance will attract every other substance that is negatively charged.
More on the law of magnetic attraction can be found here: https://brainly.com/question/8515415
Which two pieces of data could indicate that a volcano is about to erupt?
A. A drop in average air temperature in one region
U
B. A decrease in the ocean level near a mountain range
O C. An increase in temperature near Earth's surface
D. A change in the types of gas detected in the air
U
SUBMIT
Answer:
D. A change in the types of gas detected in the atmosphere
Answer:
D: A change in the type of gas detected in the Air
C: An increase in temperature near Earth's Surface
Explanation:
I took the quiz. I Hope this helps!!
PLEASE HELP ! ! ! Three quantum numbers are derived from Schrodinger’s equation that describe the probability of finding an electron around a nucleus: the principal quantum number, the angular momentum quantum number, and the magnetic quantum number. Define each quantum number.
Answer:
Principle Quantum Number: It describes the size of the orbital and the main energy level. It is represented by n. Where, n = 1,2,3,4....stands for K, L, M, N shell and so on..
Angular momentum Quantum Number : It describes the shape of the orbital. It is represented as 'l'. The value of l ranges from 0 to (n-1). For l = 0,1,2,3... the orbitals are s, p, d, f...
Magnetic Quantum Number : It describes the orientation of the orbitals. It is represented as . The value of this quantum number ranges from . When l = 2, the value of will be -2, -1, 0, +1, +2.
Answer:
Principal Quantum Number: designates the principal electron shell. Angular Momentum Quantum Number-This quantum number determines it's shape of an orbital and thus it's angular distribution. This quantum number determines the number of orbital numbers, their orientation within the sub-shell.
Principal Quantum Number, n
It describes the size of its orbital and of the main energy level. It is represented by n. Where, n = 1,2,3,4....stands for K, L, M, N shell and so on..
ngular Momentum Quantum Number l
It describes the shape of the orbital and thus the angular distribution. It can take from 0 to (n - 1). That is l = 0,1,2,...,(n - 1)
The magnetic Quantum Number, m
It describes the orientation of the orbitals. It is represented as . The value of this quantum number ranges from . When l = 2, the value of will be -2, -1, 0, +1, +2.
Explanation:
hi :) how to test if a solution is neutral?
Explanation:
solution is neutral because it added water and water is neutral solution
1. Find the volume ( cm3) of oxygen in: a. 1000cm3 of air b. 50 cm3 of air.
Answer:
A. 210 cm³
B. 10.5 cm³
Explanation:
It is important for us to note that air contains 21% of oxygen, O2. With this idea in mind, let us answer the questions given above.
A. Volume of air = 1000 cm³
Volume of O2 in air =.?
Percentage composition of O2 in air = 21%
Volume of O2 = 21% x 1000
Volume of O2 = 21/100 x 1000
Volume of O2 = 210 cm³
Therefore, the volume of O2 in 1000 cm³ of air is 210 cm³.
B. Volume of air = 50 cm³
Volume of O2 in air =.?
Percentage composition of O2 in air = 21%
Volume of O2 = 21% x 50
Volume of O2 = 21/100 x 50
Volume of O2 = 10.5 cm³
Therefore, the volume of O2 in 50 cm³ of air is 10.5 cm³.
Which correctly lists the three gases that are part of Earth's cycles in both the atmosphere and biosphere?
O radon, carbon monoxide, oxygen
O carbon dioxide, nitrogen, oxygen
O nitrogen, carbon dioxide, carbon monoxide
O carbon dioxide, radon, oxygen
Answer:
The correct answer is actually, B) carbon dioxide, nitrogen, oxygen
Answer:
B
Explanation:
Water has a density of 1.0 g/ml and a test liquid has density of 1.1 g/ml. If you pour equal portions of the two liquids into a cup,what will happen ( assuming the two do not mix or create a chemical reaction)?
Answer:
Since the test liquid is denser than water, theoretically the test liquid would sink, but since the difference is so minor, the liquid poured after may float on top of the other liquid.
Explanation:
Answer:the test liquid will be on top.
Explanation:the test liquid has a higher density(1.1g/mol) than that of the water with density (1.0g/mol)
Iodine is used to detect and treat thyroid cancer. When iodine-131 gives off a beta particle, what is the new isotope called?
Answer:
Xenon- 131
Explanation:
Iodine- 131 ------------------> Xenon -131 + Beta particle
Which of the following chemical reactions is reversible?
A. The burning of wood.
OB. The dehydration of copper sulfate (CuSO4).
O C. The neutralization of an acid.
OD. The freezing of water into ice
Reset Selection
The distance between consecutive peaks or troughs in a wave is
A. wavelength.
B. displacement
C. amplitude.
D. frequency.
Answer:
A. Wavelength
Explanation:
Answer:
Wavelength
Explanation:
The distance between consecutive peaks or troughs in a wave is called the wavelength.
During an experiment, you weigh the mass of a piece of wood as 200 grams.
You burn it so that the smoke released can turn a small turbine above the
burning wood. Afterwards, you weigh the mass of the ashes as 90 grams.
Why has your experiment not broken the Law of Conservation of Mass?
A. The Law of Conservation of Mass does not apply to combustion reactions.
B. The missing mass was released in the smoke, which was not weighed, making it seem
like there is less mass in the products than the reactants.
C. All of the missing mass has been converted into heat energy. It doesn't affect the Law of
Conservation of Mass because it uses Einstein's law E = MC2 instead.
D. Some of the total energy of the reaction was used to turn the turbine, so there should be
less mass overall in the products of the reaction.
Reset Selection
What does the latent heat of fusion measure?
Answer:
The energy required to change the phase of a substance is known as a latent heat.
Explanation:
The energy require is Q= m L, where m is the mass of the substance and L is the specific latent heat of fusion or vaporisation which measures the heat energy to change 1 kg of a solid into a liquid. hope this helps you :)
Answer & Explanation:
The energy required to change the phase of a substance is known as a latent heat. ... The energy require is Q= m L, where m is the mass of the substance and L is the specific latent heat of fusion or vaporization which measures the heat energy to change 1 kg of a solid into a liquid.
Which of the following properties of atoms decrease as you move down a column on the periodic table
Ionic radii
Ionization energy
Answer:
ionization energy
Explanation:
Answer:
was the other answer right?
Explanation:
Which is a cause of desertification? A.farming B.creating reservoirs C.overgrazing D.driving motor vehicles
Answer:
overgrazing
Explanation:
The main cause of desertification is Overgrazing.
What is desertification?Desertification is a type of dryland land degradation in which biological production is lost as a result of natural processes or human activity, causing productive areas to become progressively arid.
Overgrazing by the animals makes the land dry and loss in the vegetation.
Farming produces vegetation not destroy vegetation.Creating reservoirs does not make land dry.Driving motor vehicles is also not the reason of desertification.Hence Overgrazing is the cause of desertification.
To know more about desertification, visit the below link:
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What is the frequency of a wave traveling west with a velocity of 414 meters per second and a wavelength of 1.8 meters? hertz
Answer:
230hz
Explanation:
Hello,
To solve this question, we gave to use the relationship between velocity-frequency-wavelength to find the frequency in this question.
V = Fλ
V = velocity or speed of the wave
F = frequency of the wave
λ = wavelength of the wave
Data;
V = 414m/s
λ = 1.8m
f = ?
V = fλ
f = v/λ
f = 414/1.8
f = 230hz
The frequency of the wave is 230hz
Answer:
230
Explanation:
Number of
Protons
Number of
Neutrons
Atomic
Number
Mass
Number
Element
(symbol)
4.
2.
A
B
D
12
10
F
Using the periodic table, complete the table to describe each atom. Type in your answers.
A
B
C
D
E
F
Answer:1:En química, el número másico o número de masa es la suma del número de protones y el número de neutrones del núcleo de un átomo. Se simboliza con la letra A (el uso de esta letra proviene de alemán Atomgewicht, que quiere decir peso atómico, aunque sean conceptos distintos que no deben confundirse).
2:
The diagram show the electron arrangements in the atom of 4 elements.
Which element does NOT form a covalent form?
The element does NOT forms a covalent bond is A
What is covalent Bond ?A covalent bond is a chemical bond that involves the sharing of electrons to form electron pairs between atoms.
These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding.
Therefore, The element does NOT forms a covalent bond is A
Learn more about bonding here ;
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For the reaction of 2Na20, if you have 18.0 g of Na,
how many grams of O2 are needed for reaction?
Answer:
6.26 g of O2.
Explanation:
We'll begin by writing the balanced equation for the reaction of sodium, Na and oxygen, O2 to produce sodium oxide, Na2O.
This is shown below:
4Na + O2 → 2Na2O
Next, we shall determine the masses of Na and O2 that reacted from the balanced equation.
This is illustrated below:
Molar mass of Na = 23 g/mol
Mass of Na from the balanced equation = 4 x 23 = 92 g
Molar mass of O2 = 16x2 = 32 g/mol
Mass of O2 from the balanced equation = 1 x 32 = 32 g.
From the balanced equation above,
92 g of Na reacted with 32 g of O2.
Finally, we shall determine the mass of O2 needed to react with 18 g of Na.
This can be obtain as follow:
From the balanced equation above,
92 g of Na reacted with 32 g of O2.
18 g of Na will react with = (18 x32)/92 = 6.26 g of O2.
Therefore, 6.26 g of O2 is needed for the reaction.
Propane (C3H3) is used in domestic cooking and heating. A typical home in Pennsylvania burns 750 gal of propane for heating over the course of a year. How many moles of propane are burned? (the density of propane is approximately 4.2lb/gal)
Answer: There are 32400 moles of propane burned.
Explanation:
To calculate the mass of propane, we use the equation:
[tex]\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}[/tex]
Density of propane = [tex]4.2lb/gal[/tex]
Volume of propane = 750 gal
Putting values in above equation, we get:
[tex]4.2lb/gal=\frac{\text{Mass of propane}}{750gal}\\\\\text{Mass of propane}=(4.2lb/gal\times 750gal)=3150lb=1428840g[/tex] (1 lb=453.6 g[/tex]
According to avogadro's law, 1 mole of every substance weighs equal to molecular mass and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}=\frac{1428840g}{44.1g/mol}=32400moles[/tex]
Thus there are 32400 moles of propane burned.
Does sulfanamides toxic to humans ?and why
Answer:
No
Explanation:
Most sulfanamides are antibiotics, which kill the bacteria cells, but thankfully not human cells. They work by distrupting the production of dihydrofolic acid (form of folic acid that human/bacteria cells use for protein production).
How many molecules are in each sample?
A. 4.9 g H2O
B. 54.4 g N^2
C. 89 g CCI4
D. 11 g C6H12O6
Answer:
To find the number of molecules first find the number of moles.
number of moles (n) = mass / molar mass (M)
then use the formula
N = n × L
where n = number of moles
N = number of entities
L = Avogadro's constant = 6.02 × 10^23entities to find the number of molecules
A. 4.9 g H2O
m = 4.9g
M = (2*1)+(16×1) = 2 + 16 = 18g/mol
n = 4.9/18 = 0.272mol
N = 0.272 × 6.02 × 10^23
= 1.6374*10^23 molecules of H2O
B. 54.4g of N2
m = 54.4g
M(N2) = 14×2 = 28g/mol
n = 54.4/28 = 1.942mol
N = 1.942 * 6.02*10^23
= 1.1690*10^24 molecules of N2
C. 89 g CCI4
m = 89g
M(CCl4) = 12 + (35.5 × 4) = 154g/mol
n = 89/154 = 0.577mol
N = 0.577 × 6.02 × 10^23
= 3.473*10^23 molecules of CCl4
D. 11 g C6H12O6
m = 11g
M(C6H12O6) = (12×6)+(12×1)+(16×6) =
180g/mol
n = 11/180 = 0.0611mol
N = 0.0611 × 6.02×10^23
= 3.678*10^22 molecules of C6H12O6
Hope this helps
Acids & bases/concentrationA mixture is made by mixing 425 mL of 0.94 M H2SO4 with 750. mL of 0.83 M NaOH. (a) What is the limiting reactant? (b) How much excess reactant will be left over? (c) Is this mixture acidic or basic? Why?(d) What is the concentration of the [H+] or [OH-] ions that remain in this solution?(e) Calculate the pH of this solution.
Answer:
a. NaOH is limiting reactant
b. 0.0882 moles H₂SO₄
c. Acidic
d. 0.15M [H⁺]
e. pH = 0.82
Explanation:
The reaction of NaOH with H₂SO₄ is:
2NaOH + H₂SO₄ → 2H₂O + Na₂SO₄
a. To calculate limiting reactant:
Moles NaOH:
750mL = 0.750L ₓ (0.83mol / L) = 0.6225moles NaOH
Moles H₂SO₄:
425mL = 0.425L ₓ (0.94mol / L) = 0.3995moles H₂SO₄
As 1 mole of H₂SO₄ reacts with 2 moles of NaOH, moles of NaOH that must react with 0.3995moles H₂SO₄ are:
0.3995moles H₂SO₄ ₓ (2moles NaOH / 1 mole H₂SO₄) = 0.799 moles of NaOH.
As you have just 0.6225 moles of NaOH
NaOH is limiting reactantb. 0.6225 moles of NaOH will react with:
0.6225 moles NaOH ₓ (1 mole H₂SO₄ / 2 mole NaOH) = 0.3113 moles H₂SO₄
That means will remain:
0.3995moles H₂SO₄ - 0.3113 moles H₂SO₄ =
0.0882 moles H₂SO₄c. As you have an excees of sulfuric ACID, the mixture will be acidic
d. From 1 mole of H₂SO₄ you will have in solution 2 moles of H⁺, thus, from 0.0880 moles of H₂SO₄you will obtain 0.0882*2 = 0.1764 moles of H⁺
In 425 + 750mL = 1175mL = 1.175L
[H⁺] = 0.1764 moles of H⁺ / 1.175L =
0.15M [H⁺]e. As pH is -log [H⁺]
pH = 0.82give three example of mixture that can be separated by filtration process
Answer:
Mixture of sand and water.Mixture of chalk particles in water.Mixture of pebbles and water.Explanation:
Hope it helps.
In the reaction Cal2 (s) + Cl2 (g) CaCl2 (s) + I2 (s), what phases are the products in after the reaction?
A. CaCl2 is a liquid, and l2 is a gas.
B. Cal2 is a solid, and CaCl2 is in aqueous solution.
C. Both products are liquids.
D. Both products are solids.
Answer:
D. Both products are solids.
Explanation:
The equation for the reaction is given below:
Cal2(s) + Cl2(g) —> CaCl2(s) + I2(s)
A careful observation of the equation, shows that the products are in the following phase:
CaCl2 is in solid state.
I2 is in solid state.
From the above we can see clearly that both products are in solid state.
Which is a use for clay? ceramics batteries plaster chalk ED2020
Answer:
Answer is A.
Explanation:
I litterally just took the quiz in Edge and I got 100%.
Answer:
The answer is A.) Ceramics because clay can't make chalk, plaster, or batteries but ceramics is the form of art you use clay in. I also took the test on edge 2021.
Explanation: