Mm 2mCOO 19. Calculate the hydrogen-ion concentration [H+] for the aqueous solution in which [OH-] is 1 x (3 points) 10-11 mol/L. Is this solution acididc, basic, or neutral? Show your work.
Answer: The hydrogen-ion concentration for the aqueous solution is [tex]10^{-3}mol/L[/tex] and solution is acidic.
Explanation:
pH or pOH is the measure of acidity or alkalinity of a solution.
pH is calculated by taking negative logarithm of hydrogen ion concentration and pOH is calculated by taking negative logarithm of hydroxyl ion concentration.
[tex]pOH=-\log [OH^-][/tex]
Putting in the values:
[tex]pOH=-\log[1\times 10^{-11}][/tex]
[tex]pOH=11[/tex]
[tex]pH+pOH=14[/tex]
\[tex]pH=14-11=3[/tex]
[tex]pH=-log[H^+][/tex]
[tex]3=-log[H^+][/tex]
[tex][H^+]=10^{-3}M[/tex]
As pH is less than 7, the solution is acidic.
electrons are transferred in forms of what
Answer:
ionic bonds
Explanation:
ASAP PLSSS!!!!! How many atoms of strontium are in a sample of 33.6 mol strontium?
1) 4.22 x 1023 atoms Sr
2) 4.22 x 1024 atoms Sr
3) 2.02 x 1025 atoms Sr
4) 2.02 x1023 atoms Sr
Answer:
33.6 mol of the atom strontium contains approximately
3) 2.02 × 10²⁵ atoms of strontium
Explanation:
The number of atoms in one mole of a substance is given by Avogadro's number number, [tex]N_A[/tex], which is presented as follows;
1 mole of a substance contains [tex]N_A[/tex] = 6.022 × 10²³ elementary particles
33.6 mol of a substance will contain 33.6 × 6.02214 × 10²³ elementary particles of the substance
Therefore;
33.6 mol of the atom strontium contains 33.6 × 6.02214 × 10²³ = 2.023439 × 10²⁵ atoms of strontium
33.6 mol of the atom strontium contains ≈ 2.02 × 10²⁵ atoms of Sr.
help please! asap!
Which of the following experiments could you perform to investigate the effect temperature has on the volume of a gas? ( AKS 5b DOK 2)
A.
Measure the pressure of the air in a tire on a cold day, a warm day, and a hot day.
B.
Measure the volume of a balloon filled with room temperature air. Place the balloon in a freezer for an hour and then measure its volume again.
C.
Stretch a balloon over the top of a beaker filled with baking soda and vinegar and observe how the balloon changes volume.
D.
Inflate one balloon to a large volume and another balloon to a small volume. Measure the temperature of the air released from both balloons.
Answer:A
Explanation:
Answer:
m
Explanation:
There are three factors in which natural selection occurs. Select one statement from the list below that is a true statement about natural selection.
Answer: There is no list in your question. But the three factors in which natural selection occurs are:
1. A struggle for existence,
2. Variation and
3. Inheritance
Explanation:
Darwin’s theory of natural selection is the way in which organisms change overtime.
These changes allow organisms to become better adapted to their environment and increase their chances for survival.
The three major factors through which natural selection occurs are:
1. A struggle for existence,
2. Variation and
3. Inheritance
Darwin’s theory of natural selection will occur if the three conditions above are met and unless these factors are in place, natural selection will not occur.
What are the major social and political barriers to using solar energy?
True or false: chewing your food is the first step of digestion. o True O False
Answer:
True
Explanation:
I searched it up lol
CH3OH can be synthesized by the reaction:
COg + 2 H2g– CH30Hg
What volume of CH3OH gas (in L) can be synthesized if 18.6 L of H2 gas completely reacts at STP conditions?
Answer:
55
Explanation:
Which statement is about weather and not climate?
A. The high temperature yesterday in Dallas was 24°C.
B. Dallas has hot summers and generally mild winters.
C. The coolest month of the year in Dallas is usually January.
D. In Dallas, it often reaches 40°C in the summer.
Answer:
B
Explanation:
I hope that's right I think it is though
during the ___________ (anaphase, metaphase) step of mitosis, the centromere of each pair of chromatids becomes attached to two spindle fibers
50g of potassium chloride is dissolved in 500 cm3 of water. Calculate the concentration of the solution. Give your answer in g/dm3
When converting from grams to the must be used as a conversion factor
1 pts
Which of the following gases would you predict to be least ideal?
Cu
Explanation:
The gas that would behave least ideally is CO
How many grams of AgCl are produced from 10.0 g AgNO3?
Answer:
Equation of Reaction = AgNO3 (aq) + NaCl (aq) → AgCl (s) + NaNO3 (aq)
Steps:
1. Find the moles of AgNO3 with formula n= Mass/Mr (molecular mass)
so you will get moles= 10.0/ 169.87 = 0.05886854654
2. Using stoichiometry you know the equation has 1 mole so the moles of AgCl are gonna be the same; therefore, you will use again the same formula.
3. moles= mass/molecular mass
0.05886854654 = x/ 143.32
You rearrange the formula to find the mass
so mass = moles x molecular mass
mass = 0.05886854654 x 143.32
mass= 8.44 grams
Explanation:
It is more logical to believe that the complex life sustaining processes of the sun-Earth system were created because they Choose... on one another.
A. rely
B. orbit
C. breathe
D. spin
What number is pointing to the area where magma is less dense due to
heat?
Answer:
I think it's 2
Explanation:
The magma gets so hot, it floats up before cooling and sinking again
2) Why do some earthquakes cause more damage than others?
Answer:
Earthquakes are more intense the faster the planet's crust slams together, which explains why the shaking causes so much damage in some of the most populated areas around mountain chains. ... One reason for this connection is that when two plates come together quickly, the area over which an earthquake occurs is larger.Explanation:
Eye Color
Genetic
O Environmental
O Both
Answer:
the first cause eye color is genetic
Which of the following represents the molecules of one compound and
atoms of one element?
Answer:
i think its b.c but I'm not sure
Answer:
A
Explanation:
A is element as all of them look the same
b is mixture of atoms
C is mixture of atoms and compounds
D is just atoms
E is mixture of element and compound
give an example of how an organism can use surface tension?
Answer: Examples of surface tension
Explanation:
Water striders use the high surface tension of water and long, hydrophobic legs to help them stay above water. Water striders use this surface tension to their advantage through their highly adapted legs and distributed weight.
Which of the following is most likely a chemical reaction?
Group of answer choices
Two solid powders are combined and shaken. The substances form a mixture.
A solid is stirred into a liquid solution. The temperature of the solution decreases.
Three liquids are poured into a beaker and swirled. One of the liquids settles at the bottom.
A liquid is heated until it reaches its boiling point. Vapor is created.
Answer:
Two solid powders are combined and shaken. The substances form a mixture.
Which of the following setups will correctly convert 36.45 grams of sodium to moles of sodium?
Answer:
D.
Explanation:
To convert from grams of a substance to moles of a substance, you use molar mass as a conversion factor. Sodium's molar mass is 22.99 grams per mole. To cancel out grams, you need to place grams on the bottom and moles on the top.
Can you build a fire on the moon? Why or why not?
Answer:
No.
Explanation:
We can't build a fire on the moon, because moon's atmosphere lacks oxygen.
[tex] \huge \pink{answer}[/tex]
No lightning of a fire on the surface of the moon is impossible..
[tex] \huge \green {reasons - }[/tex]
surface of the moon lacks oxygen which is important for the formation of fire.Surface of the moon doesn't have wind which disables the fire to burn rapidly.how many valence electrons does C6H14O6 have?
chhfjhfhou huohfpgvvocoj ognf
I need help ASAP please
Calculating pH
See chart below
Answer:
12, basic, 9, basic
Explanation:
pH = -log[H+]
Using the data in the table, you can calculate the pH:
-log[1e-12] = 12
-log[1e-9] = 9
To find out whether it is acidic, basic, or neutral, use a pH scale. Anything less than 7 is acidic, anything over is basic. Knowing this, both will be basic.
Sodium bicarbonate (NaHCO3), also known as baking soda, is used to relieve heartburn, sour stomach, or acid indigestion by neutralizing excess stomach acid. When used for this purpose, it is said to belong to the group of medicines called antacids.
How many atoms are found in two molecules of sodium bicarbonate?
Answer:
NaHCO3 = No. of atoms in one molecule is 1 sodium + 1 Hydrogen + 1 carbon + 3 oxygens = 6 atoms per molecule.
We double it for two molecules, so 12 Molecules!
Explanation:
Hope i helped, Brainliest would be appreciated!
Have a nice day!
-Aadi x
Which best describes a heterogeneous mixture? 0 A table salt and water O B. alcohol and water O C. oil and vinegar O D. hot tea and sugar
Answer:
oil and vinegar
the rest would mix well so you can't determine the individual components
Explanation:
How many milliliters of 0.100 M HClO4 solution are needed to neutralize 50.00 mL of 0.0832 M NaOH?
The milliliters of 0.100 M HClO4 solution are needed to neutralize 50.00 mL of 0.0832 M NaOH is 24.9 ml.
What is neutralization?Neutralization is defined as a chemical reaction in which an acid and a base quantitatively react with one another. Because it determines how acidic or basic a solution is, a solution's pH is crucial. The interaction of H+ ions and OH- ions produces water in a neutralization reaction, which occurs when an acid and a base react to form water and a salt.
Since the mole ratio of HClO4 to NaOH is 1:1, the moles of HClO4 are equal to 4.16 x 10-3 moles.
The moles of NaOH are equal to (0.0832 x 50) /1000.
Therefore, the volume of HClO4 is equal to the moles/molarity, which is 4.16 x 10-3mol/ 0.167 mol/L= 0.0249L.
This amount is then multiplied by 1000 to get ml: 0.0249 x 1000 = 24.9 ml.
Thus, the milliliters of 0.100 M HClO4 solution are needed to neutralize 50.00 mL of 0.0832 M NaOH is 24.9 ml.
To learn more about neutralization, refer to the link below:
https://brainly.com/question/27891712
#SPJ2
The majority of Earth's energy comes from.
1) Deep ocean vents
2) Zone
3) Volcanoes
4) The sun
If the sun output of solar radiation increased by 20% how would this impact the temperature of earth's mantle
Answer:
The temperature will not be affected directly
Explanation:
The solar radiation has a direct effect on the outer surface and inner part of the earth but an increase by 20% of the solar radiation will not cause the temperature of the Earth's mantle to increase because the factors that heat up the Earth's mantle are : Friction between core materials that sink into the center of the planet and Heat from decay of radioactive materials