What is the pH of a solution with an H+ ion concentration of
2.4E-4?
**Make sure to report your answer to the appropnate number of significant figures.
Answers
Answer: 3.6
Explanation: You use the formula pH = -log([H+]) and plug in the 2.4E-4 with a negative log. After you convert H+ to the pH, you will change the final answer of 3.62 to the correct amount of significant figures which is 3.6.
Answer:
Here is the correct answer. 3.6
Related Questions
Summary
1.
Water is the most abundant substance on the surface of the earth.
About 71% of the earth's surface is covered by water.
2. Hydrogen is prepared in the laboratory by the action of zinc on
dilute hydrochloric acid or dilute sulphuric (VI) acid.
3. Hydrogen burns in oxygen to produce water. Water is an oxide
of hydrogen.
4. Active metals react with cold water to produce hydrogen gas
and the hydroxide of the metal in solution. Less active metals
react with steam to produce hydrogen and the oxide of the metal.
Copper and lead do not react with water.
5. Hydrogen is a reducing agent. It removes combined oxygen
from metal oxides of the less reactive metals.
6.
Reduction is the loss of oxygen from a compound. Oxidation is
the gain of oxygen by a substance.
7.
A reducing agent is a substance which removes oxygen from
another substance. An oxidising agent is a substance which gives
out oxygen to another substance.
when
water changes the
colour of coppe - 11
Revision Exercise sulphatorom blueto
1. (a) State the chemical tests for presence of water.
water change the color
(b) State the test, which is used to show that water is pure. Chistide paper from b
of copper anhydrous cobele
2.
Describe an experiment to show that water is an oxide of hydrogen.t non
3. State the precautions that must be taken when carrying out experiments with hydrogen.
Why is it not advisable to use iron in making steam boilers?
Write a word equation for a reaction in which hydrogen acts as a reducing agent.
Name the products formed when kerosene is burned in air.
State what is observed when a small piece of potassium is placed in water. Write a
word equation for the reaction.
Draw a labelled diagram to show how a reaction between steam and magnesium should
be carried out.
Describe how dry hydrogen is prepared in the laboratory.
Property of the Government of Kenya
Potassium
sodium
Calcim
Magne
Alun
Corbi
Zin
Answers
Explanation:
I know only one.You are in form.....
An alkene with molecular formula C4H8 reacts with bromine to form a compound with molecular formula C4H8Br2 What is the name of this type of reaction?
Answers
Brainliest plz?
It is a type of of addition combination chemical reaction where in bromine adds across the double bonds of butane whose chemical equation is C₄H₈ +Br₂[tex]\rightarrow[/tex]C₄H₈Br₂.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
Learn more about chemical equation,here:
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Substances that can carry electric current under some conditions but not under others are called semiconductors.
Answers
Which statement about light energy is incorrect?
A. Light energy travels as electromagnetic waves
B. We can only see light if the wavelengths are in a
certain part of the electromagnetic spectrum
C. Refraction is when light bends as it passes through
another medium
D. Light is absorbed at a higher rate if the color of the
object it hits is brighter
Answers
Answer:
The correct answer is C
Explanation:
light refracts whenever it travels at an angle into a substance with a different refractive index(optical density)
Which of the following is a way to decrease the pressure of a gas?
A. Increase the number of molecules
B. Increase the volume
C. Decrease the volume
Answers
Answer:
b
Explanation:
because pressure is inversely proportional to volume.
Also with a larger volume the gas particles will collide less on each other and the walls of the container
A way to decrease the pressure of a gas is to decrease the volume.
What are ways to increase the pressure of a gas?
Three Ways to Increase the Pressure of a Gas
Increase the amount of gas.Increase the temperature of the gas.Decrease the volume of the gas.What are the 3 factors that affect gas pressure?Temperature, pressure, volume, and the amount of a gas influence its pressure.
Learn more about gas laws here https://brainly.com/question/25290815
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Coral reefs are essential for the survival of other organisms. They provide::
A. Microhabitats
B. Shelter
C. Breeding grounds
D. All of the above
“Science”
Answers
When precipitation falls in summer, sometimes wind pushes it back up into freezing temperatures before falling again. What will most likely occur when this happens?
A.
hail will fall
B.
rain will fall
C.
sleet will fall
D.
snow will fall.
Answers
Answer:
A
Explanation:
hail will fall push it back up making it bigger comes back down
help me get this right no links
Answers
Answer:
The moons gravitational pull on Earth
Name two metals which will not liberate hydrogen from
dilute tetraoxosulphate(vi) acid.
Answers
To solve such this we must know the concept of double displacement reaction. Therefore, copper (Cu) and silver (Ag) would not liberate hydrogen from dilute tetraoxosulphate(vi) acid.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
Copper (Cu) and silver (Ag) would not liberate hydrogen because they are less reactive than hydrogen since their standard reduction potential is higher.
Therefore, copper (Cu) and silver (Ag) would not liberate hydrogen from
dilute tetraoxosulphate(vi) acid.
Learn more about the chemical reactions, here:
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WORTH 20 POINTS!! Need answer ASAP
Answers
Answer:
i cant see the image im good at chem if you can write it down in the comments ill answer it
Explanation:
I really need help with this chemistry assignment multiple choice
Answers
Answer:
b option to is correct and answer bro
A 2.2 M solution is made by with 0.45 moles of a solute. What is the final volume of this solution?
Answers
Answer: The final volume of this solution is 0.204 L.
Explanation:
Given: Molarity of solution = 2.2 M
Moles of solute = 0.45 mol
Molarity is the number of moles of solute present divided by volume in liters.
[tex]Molarity = \frac{no. of moles}{Volume (in L)}[/tex]
Substitute the values into above formula as follows.
[tex]Molarity = \frac{no. of moles}{Volume (in L)}\\2.2 M = \frac{0.45}{Volume}\\Volume = 0.204 L[/tex]
Thus, we can conclude that the final volume of this solution is 0.204 L.
Which of the following substances
represents a compound?
A. saline: NaCl and H,0
B. helium: H
c. carbon dioxide: CO
D. iron; Fe
Answers
PLEASE ANSWER IF YOU KNOW
Which biome has an average winter temperature of -26 degrees Celsius, gets 12-20 inches of rain per year, and has grazing caribou?
Answers
Answer:
The tundra!
Explanation:
It is the only biome that has an average winter temperature of -26 degrees Celsius, gets 12-20 inches of rain per year, and has grazing caribou!
Hope this helps!
why hydroxide an oxidation reaction??
Answers
Answer:
sorry I didn't know this one i did all the work and stuff and still couldn't get it sorry
How many molecules are there in 24 grams of HSO₃?
Answers
Answer:
1.2×1023 molecules.
hope it helps
If I dilute 213 mL of 9.22 M H2SO4 to 390 ml, what would be the concentration (molarity) of the new solution?(round your answer to the hundredths
place)
HELLOPPPPP PLEASEEE ):
Answers
Answer:
5.0 moles
Explanation:
213/390 x 9.22 = 5.04
Round to least sig fig (390 ml)
5.0
[tex] \huge\mathcal\colorbox{red}{\color{pink}{質問 ↷}}[/tex]
what are Noble Gases?
Answers
Answer:
any of the gaseous elements helium, neon, argon, krypton, xenon, and radon, occupying Group 0 (18) of the periodic table. They were long believed to be totally unreactive but compounds of xenon, krypton, and radon are now known.
Explanation:
The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).
Power gathered from the sun and wind
A
is considered a nonrenewable resource.
B
can provide humans with energy forever.
с
can only be used in the daytime.
D
is not a natural resource.
Answers
Answer: B. Can provide humans with energy forever
Explanation: The warm air rises and cooler air rushes in to take its place. The moving air is wind. As long as the sun shines, there will be winds on the Earth. We will never run out of wind energy.
Can provide humans with energy forever
this is actually science but anyways my teacher didn't explain much can someone help?
Answers
Tt hetero
tt homo
What is deforestation?
A
the process of finding medicine ingredients in the rainforest
B
the planting of new trees on empty land
с
the process by which trees soak up carbon dioxide
D
the cutting down of existing forests
Answers
Answer:
D.
Explanation:
The action of clearing a wide area of trees.
Deforestation is the action of clearing a wide area of trees.
what is
the sum total of all water on earth and its atmosphere is called
Answers
Answer:
Biosphere.
Explanation:
bgsgsgdvxvhshsmxhndgdnhdhbd
What is a group of words called that contains elther a subject or a verb, but not both?
Answers
Answer:
Phrase
Explanation:
Phrases don't have both, but clauses do.
why should the wearing of uniforms be discontinued in highscho
Answers
Al2(SO4)3 + CaCl2 → AlCl3 + CaSO4
Answers
Which of the following can be used to detect the presence of an acid?
A. All of the answers are correct
B. blue litmus paper
C, a red cabbage solution
D. an indicator
Answers
The main use of litmus is to test whether a solution is acidic or basic. Light Blue litmus paper turns red under acidic conditions and red litmus paper turns blue under basic or alkaline conditions
Below is a chemical equation. Which of the following are identified by the blue arrows?
Captionless Image
atomic numbers
coefficients
products
subscripts
Answers
help me get this right no links
Answers
I think you forgot to upload the image. Create a new question including the image so that we can see the question.
WILL GIVE BRAINLIEST ANSWER!!!
How many moles of hydrogen are required to produce 6 moles of water?
Answers
Answer: 6 moles
Explanation:
The balanced equation for this reaction is [tex]2\text{H}_{2}+\text{O}_{2} \longrightarrow 2\text{H}_{2}\text{O}[/tex].
This means that for every 2 moles of water produced, 2 moles of hydrogen are consumed.
Thus, if 6 moles of water are produced, this means 6 moles of hydrogen are consumed.
A .332 mold sample of gas at a constant pressure and temperature has a volume of 150.0mL. If the volume of the gas is decreased to 50.0mL, how many moles of the gas will remain
Answers
Answer:
0.111 mol
Explanation:
We can solve this problem by using Avogadro's law, which states that at constant pressure and temperature:
V₁n₂=V₂n₁Where in this case:
V₁ = 150.0 mLn₂ = ?V₂ = 50.0 mLn₁ = 0.332 molWe input the data given by the problem:
150.0 mL * n₂ = 50.0 mL * 0.332 molAnd solve for n₂:
n₂ = 0.111 mol