what is the pH of the 1.0 M KOH solution?
Answer:
So... pH of the 1.0" 10-2 mol-1 KOH is.. = 12What is the pH of a solution with a hydronium concentration of 0.36 M?
Answer:
0.44Explanation:
The pH of a solution can be found by using the formula
[tex]pH = - log [ { H_3O}^{+}][/tex]
From the question we have
[tex]pH = - log(0.36) \\ = 0.4436...[/tex]
We have the final answer as
0.44Hope this helps you
Calcular la presión final de un gas que inicialmente está a 21°C y 0,98 atm. Sabiendo que su temperatura aumenta a 37°C.
Answer:
1.03 atm
Explanation:
Primero convertimos 21 °C y 37 °C a K:
21 °C + 273.16 = 294.16 K37 °C + 273.16 = 310.16 KUna vez tenemos las temperaturas absolutas, podemos resolver este problema usando la ley de Gay-Lussac:
T₁P₂ = T₂P₁En este caso:
T₁ = 294.16 KP₂ = ?T₂ = 310.16 KP₁ = 0.98 atmColocando los datos:
294.16 K * P₂ = 310.16 K * 0.98 atmY despejando P₂:
P₂ = 1.03 atmTaking medicine can cause driving problems
such as
intense or unexpected reactions
heightened mental and physical abilities
shortened reaction time
All of the above.
PLEASE I NEED TO ANSWER THIS
Answer:
shorten reaction time
...........
how did the sociaty treated edgardo gomez accomplishments?
Explanation:
He led the world's first national-scale assessment of damage to coral reefs leading to international conservation initiatives such as the replanting of corals. He also pioneered giant clam (Tridacna gigas) breeding stationed in Bolinao and other protective areas for coastal communities of the Philippines
Which of the following is NOT a function of the muscular system
Answer:
where are the answer choices
Explanation:
im I wrong on this question?
Answer:
I don't think so
Explanation:
That's what I got
What would make a conversion not possible?
if it is already as low as it can go
Answer:
you generally can't convert between units of mass and volume (e.g., grams to gallons).
Explanation: Examples of Conversion Factors Remember, the two values must represent the same quantity as each other. For example, it's possible to convert between two units of mass (e.g., grams to pounds),
what is the molar out of a solution that contains 33.5g of CaCl2 in 600.0mL of water
Answer:
Here's what I got.
Explanation:
Interestingly enough, I'm not getting
0.0341% w/v
either. Here's why.
Start by calculating the percent composition of chlorine,
Cl
, in calcium chloride, This will help you calculate the mass of chloride anions,
Cl
−
, present in your sample.
To do that, use the molar mass of calcium chloride, the molar mass of elemental chlorine, and the fact that
1
mole of calcium chloride contains
2
moles of chlorine atoms.
2
×
35.453
g mol
−
1
110.98
g mol
−
1
⋅
100
%
=
63.89% Cl
This means that for every
100 g
of calcium chloride, you get
63.89 g
of chlorine.
As you know, the mass of an ion is approximately equal to the mass of the neutral atom, so you can say that for every
100 g
of calcium chloride, you get
63.89 g
of chloride anions,
Cl
−
.
This implies that your sample contains
0.543
g CaCl
2
⋅
63.89 g Cl
−
100
g CaCl
2
=
0.3469 g Cl
−
Now, in order to find the mass by volume percent concentration of chloride anions in the resulting solution, you must determine the mass of chloride anions present in
100 mL
of this solution.
Since you know that
500 mL
of solution contain
0.3469 g
of chloride anions, you can say that
100 mL
of solution will contain
100
mL solution
⋅
0.3469 g Cl
−
500
mL solution
=
0.06938 g Cl
−
Therefore, you can say that the mass by volume percent concentration of chloride anions will be
% m/v = 0.069% Cl
−
−−−−−−−−−−−−−−−−−−−
I'll leave the answer rounded to two sig figs, but keep in mind that you have one significant figure for the volume of the solution.
.
ALTERNATIVE APPROACH
Alternatively, you can start by calculating the number of moles of calcium chloride present in your sample
0.543
g
⋅
1 mole CaCl
2
110.98
g
=
0.004893 moles CaCl
2
To find the molarity of this solution, calculate the number of moles of calcium chloride present in
1 L
=
10
3
mL
of solution by using the fact that you have
0.004893
moles present in
500 mL
of solution.
10
3
mL solution
⋅
0.004893 moles CaCl
2
500
mL solution
=
0.009786 moles CaCl
2
You can thus say your solution has
[
CaCl
2
]
=
0.009786 mol L
−
1
Since every mole of calcium chloride delivers
2
moles of chloride anions to the solution, you can say that you have
[
Cl
−
]
=
2
⋅
0.009786 mol L
−
1
[
Cl
−
]
=
0.01957 mol L
−
This implies that
100 mL
of this solution will contain
100
mL solution
⋅
0.01957 moles Cl
−
10
3
mL solution
=
0.001957 moles Cl
−
Finally, to convert this to grams, use the molar mass of elemental chlorine
0.001957
moles Cl
−
⋅
35.453 g
1
mole Cl
−
=
0.06938 g Cl
−
Once again, you have
% m/v = 0.069% Cl
−
−−−−−−−−−−−−−−−−−−−
In reference to the explanation you provided, you have
0.341 g L
−
1
=
0.0341 g/100 mL
=
0.0341% m/v
because you have
1 L
=
10
3
mL
.
However, this solution does not contain
0.341 g
of chloride anions in
1 L
. Using
[
Cl
−
]
=
0.01957 mol L
−
1
you have
n
=
c
⋅
V
so
n
=
0.01957 mol
⋅
10
−
3
mL
−
1
⋅
500
mL
n
=
0.009785 moles
This is how many moles of chloride anions you have in
500 mL
of solution. Consequently,
100 mL
of solution will contain
100
mL solution
⋅
0.009785 moles Cl
−
500
mL solution
=
0.001957 moles Cl
−
So once again, you have
0.06938 g
of chloride anions in
100 mL
of solution, the equivalent of
0.069% m/v
.
Explanation:
i think this is it
A sample of gas is held at constant temperature. The gas is in a container with a moveable piston. The gas is
compressed into a small volume. What will happen to the pressure?
Answer:
The pressure of the gas will increase.
Explanation:
This concept of change in state properties of gas, when compressed in a moveable piston-cylinder assembly, can be explained by using Boyle's law
Boyle's law states that the pressure of a given mass of gas is inversely proportional to its volume given that temperature remains constant.
Following this law, when the gas in the container is compressed to a smaller volume, the pressure will go up.
This is also because the gas is not free to move about without frequent collisions with itself and the walls of the container, due to the resulting smaller space after compression. Therefore, the force it exerts on the walls of the container and the frequency of collision are more.
PLEASE HELP DUE SOON
Describe one piece of evidence that supports the big bang theory.
Answer: Red-Shift
Explanation:
It suggests that the universe is expanding, as distant stars/galaxies must be in motion away from us to cause the light to shift towards the red end of the spectrum (or into longer wavelengths of the EM spectrum). This agrees with the Big bang theory as that suggests the universe is expanding.
1. For the reaction below, which change would cause the equilibrium
to shift to the right?
CH.(g) + 2H,S(g) + heat
CS,(g) + 4H,(g)
(a) Decrease the concentration of H,S.
(b) Increase the pressure on the system.
(c) Increase the temperature of the system.
(d) Increase the concentration of CS,
(e) Decrease the concentration of CH,
can someone also help me answer the rest of the questions so i can check my work thank you
Answer:
option A
decrease in the concentration will light up the reaction so it will shift to right side
Pressure is a direct result of collisions between gas particles and the walls of their container.
False
True
(True is correct)
Answer:
Yes, True is correct heheh :)
The given statement is true as pressure is a direct result of the collisions between gas particles and the walls of their container.
What is pressure?Pressure is defined as the force applied on an object perpendicular to it's surface per unit area over which it is distributed.Gauge pressure is a pressure which is related with the ambient pressure.
There are various units by which pressure is expressed most of which are derived units which are obtained from unit of force divided by unit of area . The SI unit of pressure is pascal .
It is a scalar quantity which is related to the vector area element with a normal force acting on it.It is distributed over solid boundaries and across arbitary sections of fluid normal to the boundaries at every point.
Learn more about pressure,here:
https://brainly.com/question/14760196
#SPJ6
A group of 6th-grade students constructs arguments on why water conservation is important. Which student argument is correct?
A.
Student 1 argues that people need water for recreation and transportation only.
B.
Student 2 argues that as the population increases in the world, so does the need for water.
C.
Student 4 argues that we use less water for agriculture and more on personal needs.
D.
Student 3 argues that there is an unlimited supply of water for animals, ecosystems, and people to use daily.
From a chemicals standpoint, Student 2 contends that as global population grows, so does the need for water. This is the correct reasoning.
What is the purpose of chemistry?
Our basic needs of food, clothes, shelter, health, energy, and pure air, water, and soil are all met by chemistry. Chemical technologies improve our quality of life in many ways by offering fresh approaches to issues with health, resources, and energy use.
What subjects are studied in chemistry?
The study of matter, including its properties, behaviours, and structures, is known as chemistry. Chemists induce and monitor these reactions both in nature and artificially in a lab setting because they are interested in how materials behave and react in specific settings.
To know more about chemicals visit:
brainly.com/question/29240183
#SPJ1
All atoms of a given element must contain the same number of
A) protons
B) neutrons
C) electrons plus neutrons
D) protons plus neutrons
Which of the following wouldn't be a good tool to use when measuring pH values of solutions?
Question 8 options:
a)
litmus paper
b)
digital pH meter
c)
electrical conductivity meter
d)
pH paper
litmus paper
Because it will just tell if the solution is acidic or basic, it won't tell the pH
Four balls have the same temperature. Which ball has the most Thermal Energy? A.Golf ball(45g) B.Basket ball(625g) C.Bowling ball(5000g) D.Tennis ball(60g)
Answer:
b
Explanation:
b. ,u play with the ball, handle the ball grab the ball throw the ball exc.
How does La Niña affect the climate of the Pacific Ocean?
1.The warm water moves toward the east.
2.The cold water sinks deeper into the ocean.
3.The ocean becomes cooler.
4.The strength of the prevailing winds decreases
The statement in which La Niña affect the climate of the Pacific Ocean is "The cold water sinks deeper into the ocean."
What is La Niña effect?La Niña is a climate phenomenon that depicts the cooling of surface ocean waters along the coast of South America's tropical west coast.
What is climateThe average weather in a certain place over a longer length of time is referred to as climate.
The jet stream moves northward and weakens across the eastern Pacific as a result of La Niña. The South experiences warmer and drier weather than usual during La Nia winters. The North and Canada are wetter and colder than the rest of the country. The seas off the Pacific coast are cooler and contain more nutrients than typical during La Niña.
Water in the eastern Pacific is colder than typical because to La Niña. El Niño might cause the water to be warmer than usual in the same place. During La Niña years, drought-stricken areas are drenched, while El Niño years are drenched.
Hence the correct option is 2.
Learn more about climate here
https://brainly.com/question/10440860
#SPJ2
How many molecules are in 0.87 mole of carbon dioxide?
Answer:
1 moles Carbon Dioxide = 44.0095 gram using the molecular weight calculator and the molar mass of CO2
Explanation:
The molecules in 0.87 mole of carbon dioxide are 5.2 x 10²³.
What are moles?The mole is a SI unit of measurement that is used to calculate the quantity of any substance.
If there are 6.023 × 10²³ molecules present in one mole of carbon dioxide then for 0.87 moles
[tex]6.023 \times 10^2^3 \times 0.87 = 5.2 \times 10^2^3[/tex]
Thus, the molecules in 0.87 mole of carbon dioxide are 5.2 x 10²³
Learn more about moles
https://brainly.com/question/26416088
#SPJ2
Petroleum is a mixture of hydrocarbons. It is separated into useful fractions by fractional distillation.
Which property does fractional distillation rely on to separate petroleum?
Explanation:
Fractional distillation is used to separate crude oil into simpler, more useful mixtures . This method can be used because different hydrocarbons have different boiling points
Hope this help u
What is the rate law for this reaction? A + 2B → C + D
rate = k[A][B]2
rate = k[A]2 [B]2
rate = k[A]2 [B]
rate = k[A][B]
thanks!!
Answer: A:
K(A)(B)2
Explanation: gradpoint
How does the equilibrium change to counter the removal of A in this reaction? A + B ⇌ AB The equilibrium shifts left. Simultaneously, there's an increase in the reverse reaction.
Answer:
The increase in the reverse reaction
Explanation:
Based on the LeCh's principle, a change in the concentration of a species in the equilibrium will shift the concentrations of the other species in order to counteract the effect of this change.
For example, for the reaction:
A + B ⇌ AB
Remove A in this reaction will produce the increase in the reverse reaction in order to increase the concentration of A.
What evidence is there that Potential energy is entering the system
Answer:
in particular 69-189 084 = 9283983
Fossil fuels are called nonrenewable resources because
A
they were made by dinosaurs, which are extinct.
B
it is impossible for humans to make more in our lifetimes.
с
they are easy to replace whenever they run out.
D
it is possible to use them for many different purposes
Answer:
The Answer is B
Explanation:
Fossil fuels take millions of years to be made, and every other answer doesn't make sense
i need an essay about bow water bottles are ruining the earthh please ill give u a brainly
Answer:
Explanation:
Each bottle leaks harmful chemicals into our environment along the way as it decomposes. Studies show that the toxins decomposing bottles of water leach into our environment cause a variety of health issues, including reproductive problems and cancer.
PLEASE MARK AS BRAINLIEST ANSWER
What type of reaction is
Ammonia (NH3) breaking down into nitrogen gas and hydrogen gas
Answer:
Explanation:
Look at the reaction.
2NH3 ===> N2 + 3H2
It's a molecule that is breaking down to two elements on the periodic table. We used to call such a thing as a simple decomposition.
A 2.8 g sample of pure metal requires 10.1 J of energy to change its temperature from 21°C to 36°C. What is this metal? Substance Specific Heat Gold 0.129 J/g °C Silver 0.237 J/g °C Copper 0.385 J/g °C Water 4.18 J/g °C
Answer:
Silver 0.237 J/g °C
Explanation:
We know that the heat required to raise the temperature of a given mass of a substance through a given temperature rise is given by;
H = mcθ
Where;
m = mass of the body
c = specific heat capacity of the body
θ = temperature rise
10.1 J = 2.8 g * c * (36°C - 21°C)
c = 10.1 J / 2.8 g * (36°C - 21°C)
c = 0.24 J/g °C
Which of the following molecules is polar?
Group of answer choices
CF4
CH4
CH3Cl
CO2
Answer
CH3Cl is polar amoungst the choices
Consider the balanced equation below.
PCl3 +Cl2 → PC15
What is the mole ratio of PC13 to PCIS?
1:1
2:1
3.5
5:3
A. 1:1
Explanation:
hope this helps ya :)
According to the balanced equation below.
PCl₃ +Cl₂ → PCl₅
The mole ratio of PCl₃ to PCl₅ is 1:1.
What is a balanced reaction?Balancing of a reaction is done according to the "Law of conservation of mass" and balancing helps in solving stoichiometry questions correctly as if we will not balance the reaction then the quantitative results in a particular question doesn't come correctly.
Balancing of a reaction helps in mole concept as well and it is one of the laws of chemical reactions as well.
Some examples of balanced chemical reactions are-
2Mg(s) + O₂(g) ⟶ 2MgO(g)
Given reaction is,
PCl₃ +Cl₂ → PCl₅
Therefore, The mole ratio of PCl₃ to PCl₅ is 1:1.
Learn more about balancing of reaction on:
https://brainly.com/question/12299665
#SPJ7
Which of these is an energy source for chemosythesis? Sunlight Moonlight Carnivores Sulfur molecules
Answer:
Sulfur molecules
Explanation:
Chemosynthesis can be defined as the process of producing the energy rich nutrients molecules from the chemicals. The chemosynthesis bacteria are those bacteria that are capable of absorbing chemicals from the ocean floor like hydrogen sulfide.
Thus it is a process of making energy rich molecules using the chemical energies.
In the context, sulfur molecules are the sources of energy for the process of chemosynthesis.