WILL GIVE BRAINLIEST - A solution has a [H3O+] of 1 × 10−3 M. What is the [OH−] of the solution?
11 M
14 M
1 × 10−14 M
1 × 10−11 M
Answer:
The answer is 1 x 10 - 11 M. :))
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What information does the half-life of a radioisotope give?
A. It tells what kind of radiation is being given off by the radioactive material.
B. It tells what fraction of radioisotope is present after each half-life has passed.
C. It tells how much energy the radioactive material is generating at a point in time
D. It tells how long it takes for a radioactive isotope to become a daughter element.
Answer:
D. It tells how long it takes for a radioactive isotope to become a daughter element
Explanation:
The other answer was wrong
Option B. It describes what fraction of radioisotope exists present after each half-life has passed is the information does the half-life of a radioisotope give.
What is radioisotope?Radioisotopes exist as radioactive isotopes of an element. They can also be described as atoms that contain an unstable assortment of neutrons and protons, or surplus energy in their nucleus.
A radionuclide exists as a nuclide that has surplus nuclear energy, creating it unstable. This excess energy can be utilized in one of three methods: emitted from the nucleus as gamma radiation; transferred to one of its electrons to release it as a transformation electron; or used to produce and emit a new particle from the nucleus.
Radioactive half-life exists the time needed for a quantity of a radioisotope to decay by half. If the half-life of an isotope exists relatively short, e.g. a few hours, most of the radioactivity will be gone in a rare day.
Hence, Option B. It describes what fraction of radioisotope exists present after each half-life has passed is the information does the half-life of a radioisotope give.
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if you have 30 g of carbon, 300 g of chlorine and 30 g of hydrogen to form chloroform, how many grams of chlorine and hydrogen are used up in the reaction?
Explanation:
6×1.25×37.5= 281.5 g of chlorine
1×1.25×2= 2.5 g of hydrogen
PPE 15. What variables are you manipulating in this exercise? Identify a symbol to represent each variable.
The correct formula for finding the relative velocity of an object is:
Vac= vah-vыс
Valc = ab + b c
Vad = ab + b c
b c = ab + b c
Answer:
va/c = v a/b + v b/c
Explanation:
This is the correct formula for relative velocity
What did Boyle conclude about elements like gold and lead?
Answer:What did Boyle conclude about elements like gold and lead?
Explanation:
Aristotle did not believe in the atomic theory and he taught so otherwise. He thought that all materials on Earth were not made of atoms, but of the four elements, Earth, Fire, Water, and Air. He believed all substances were made of small amounts of these four elements of matter.
3. Pretend you're a farmer and you want to grow more crops. You have three different
fertilizers to choose from. Design an experiment that will help you choose which
fertilizer is best.
a. What variables would you need to control in your experiment?
b. Which variable would you change to test the fertilizers?
C. What is the measurable data point for this experiment?
d. What would the procedure be for your experiment?
Answer:
A
Explanation:
pls check for me !! thank you.
Answer:
52 mL of H₂O.
Explanation:
The balanced equation for the reaction is given below:
2H₂ + O₂ —> 2H₂O
From the balanced equation above,
2 mL of H₂ reacted with 1 mL of O₂ to produce 2 mL of H₂O.
Finally, we shall determine the volume of H₂O that will be produced by the reaction of 52 mL of H₂ at the same temperature and pressure.
This can be obtained as follow:
From the balanced equation above,
2 mL of H₂ reacted to produce 2 mL of H₂O.
Therefore, 52 mL of H₂ will also react to produce 52 mL of H₂O.
Thus, 52 mL of H₂O were obtained from the reaction.
How do hydrogels retain water?
Answer:
The combination of the polymer opening up and the water molecules sticking to it make a solution of the hydrogel get thicker and more viscous (sticky). Disposable nappies make use of the ability of hydrogels to take up and retain water, even under pressure.
Explanation:
Does a reaction involving an acid and a base have to take place in a water environment? Justify your answer.
Answer:
Yes, because the water solvent is better
Explanation:
Hope this helps
The metal aluminum coils in an air conditioner conduct thermal energy from inside the house and release it outside the house. What can be said about the coils when they are accepting the heat inside the house?
Answer:
c
Explanation:
Answer:
B: They must be cooler than the air inside the house.
Explanation:
I got it right on edge!
Fe2O3 (s) + CO (g) -> Fe(s) + CO2 (g) (unbalanced)
1.Calculate the number of grams of CO that can react with 0.150kg of Fe2O3
2. Calculate the number of grams of Fe and the number of grams of CO2 formed
when 0.150 kg of Fe2O3 reacts
Answer:
1. 78.9g of CO
2. 104.9g Fe and 124.0g CO2
Explanation:
Based on the balanced reaction:
Fe2O3 (s) + 3CO (g) -> 2Fe(s) + 3CO2 (g)
1 mole of Fe2O3 reacts with 3 moles of CO to produce 2 moles of Fe and 3 of CO2
1. The moles of 0.150kg = 150g of Fe2O3 -Molar mass: are:
150g * (1mol / 159.69g) = 0.9393 moles Fe2O3
Moles CO:
0.9393 moles Fe2O3 * (3mol CO / 1mol Fe2O3) = 2.818 moles CO
Mass CO -Molar mass: 28.01g/mol-:
2.818 moles CO * (28.01g/mol) = 78.9g of CO
2. The moles of Fe produced are:
0.9393 moles Fe2O3 * (2mol Fe / 1mol Fe2O3) = 1.8786 moles Fe
Mass Fe -Molar mass: 55.845g/mol-:
1.8786 moles Fe * (55.845g/mol) = 104.9g Fe
The moles of CO2 produced are:
0.9393 moles Fe2O3 * (3mol CO2 / 1mol Fe2O3) = 2.818moles CO2
Mass CO2 -Molar mass: 44.01g/mol-:
2.818moles CO2 * (44.01g/mol) = 124.0g CO2
Which of the following salts are soluble in water? I. ammonium carbonate II.
barium sulphate III. lead nitrate
O I, II and I
Il and Ill only
O I and III only
O I and II only
Answer:
I and III only
Explanation:
Ammonium carbonate is soluble in water
Barium sulphate is not soluble in water
Lead nitrate is soluble in water
2HCl → H2 + Cl2
Is synthesis?
Answer:
It's decomposition
explanation:
Elvis eats a peanut butter sandwich for lunch. Peanut butter contains a lot of protein, and bread is mostly starch. Elvis plans to go for a run later this afternoon. He is breathing normally. What does he need from the food he ate and the air he breathes so that he can go on his run? How do Elvis' body systems work together to get the molecules he needs into his cells? How do his cells use these molecules to release energy for his body to run?
Answer:
hi
Explanation:
An Element X has been discovered. Element X forms an Xt ion and
G9 EOT3 2020-
has an atomic number of 11. The X* ion of Element X forms a bond
with CI.
1-3
5.00
11
Na
Mg
3
22.99
19
24.10
20
21
K
Ca
Sc
19.10
400
19
Rb
Sr
Y
NOT
R$ 47
53
N7
so
CS
Ba
3.71
112.91
117 11
Ra
malleable and co
malene bi
Answer: The chemical symbol of the compound formed is [tex]XCl[/tex] or [tex]NaCl[/tex]
Explanation:
An ionic compound is formed when the complete transfer of electrons takes place from one element (usually metals) to another element (usually non-metals).
The element losing electron (metal) forms a positive ion known as a cation while the element gaining electron (non-metal) forms a negative ion known as an anion.
Element X has the atomic number 11 which is sodium. The electronic configuration of it is [tex]1s^22s^22p^63s^1[/tex]
This element will lose 1 electron to form [tex]X^+[/tex] ion of [tex]Na^+[/tex]
Chlorine has the atomic number 17. The electronic configuration of it is [tex]1s^22s^22p^63s^23p^5[/tex]
This element will gain 1 electron to form [tex]Cl^-[/tex] ion
When these two ions combine, they lead to the formation of an ionic compound having a chemical formula of [tex]XCl[/tex] or [tex]NaCl[/tex]
Hence, the chemical symbol of the compound formed is [tex]XCl[/tex] or [tex]NaCl[/tex]
1. Ecosystems are composed of biotic and abiotic factors. Which of the following
represent only an abiotic factor in an ecosystem that could have an effect on
the ecosystem?
a. rivers with more dams
b. wood being taken for manufacturing
c. waste not being used by fungi
d. decomposers only taking nutrients from plants
Answer:
wood being taken for manufacturing
Are nuclear bombs ethical? Explain please
Answer:
Yes, they are.
Explanation:
The United States is one of these nuclear superpowers, making the ethical issues associated with these weapons critical and relevant. ... Most research across disciplines unanimously agrees that it is immoral to detonate an atomic weapon due to both short and long-term catastrophic effects.
In fact, some scholars have concluded that it is therefore morally wrong to act in ways that produce these outcomes, which means it is morally wrong to engage in nuclear warfare.
Answer:
NO not at all.
Explanation:
After reading the accounts of people who survived the bomb in Hiroshima and Nagasaki in 1945 during World War II, I was horrified just reading the testimonies. Almost every single survivor described the skinless and bloated bodies they had seen everywhere. Inosuke Hayasaki, a surivor of the bombing, noticed one of his classmates, among many other citizens, pleading for water. When he tried listening for his heartbeat, his "skin slipped right off". Bombs are used in war so the other side will surrender. Bombs are aimed at "enemies" as if every being is an object to destroy. So no, bombing----let alone nuclear bombing----is ethical.
The reactant side of a balanced chemical equation is shown below.
Al2(SO4)3 + 3Cl2 →
How many chlorine atoms should there be on the product side in the equation?
2
5
6
7
Answer:
2
Explanation:
In the equation, Cl is chlorine and there is a number "2" so that the correct answer is 2.
Answer:
two
Explanation:
When a fuel is burned, any carbon that does not undergo combustion can be released as particles. What do we call this product?
Answer:
"soot" or "smoke" or "particulates" or "ash" or "carbon particulates"
Explanation:
The carbon that does not undergo combustion is released as particles. This particles are called soot or dust. Incomplete combustion also leads to the production carbon monoxide.
What is combustion ?Combustion is an exothermic process in which a gas reacts with the atmospheric oxygen producing carbon dioxide and water. This reaction involves heat to the surroundings.
Sometimes the combustion does not occurs completely. When there is insufficient oxygen for the fuel to completely react with the air to form carbon dioxide and water leads to incomplete combustion. It also occurs when a heat sink, such a solid surface or flame trap, extinguishes the combustion.
One of the byproducts of incomplete combustion is carbon monoxide. The typical incomplete combustion process releases carbon, which results in the formation of soot and dust.
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If element A is in Group 13 and element B is in Group 17, which ions will be formed when A and B react together?
A3+ and B2-
A3+ and B-
A+ and B-
A2+ and B-
Answer:
A3+ and B-
Explanation:
Elements in group 13 have outermost electron configuration, ns2np1 hence they form trivalent positive ions.
Elements in group 17 have outermost electron configuration ns2np5 hence they form univalent negative ions.
This implies that, if element A is in Group 13 and element B is in Group 17, the ions formed are A3+ and B-.
indicate the order in which orbitals 4f, 5p, 5d, and 6s are filled
Answer:
the order in which orbitals 4f,5p,5d,and 6s are filled is clacium.
what is the mass percentage for hydrogen
Answer:
The mass percent of hydrogen in hydrogen peroxide is 5.88
The mass percentage of hydrogen in water is 11.19 percent.
A cup of coffee has 71 mL of coffee and 127 mL of water. What is the percent volume of the coffee solution?
Answer:
35.9%
Explanation:
The percent volume of the coffee solution can be calculated as follows:
% volume of coffee solution = volume of coffee/total volume of coffee solution × 100
According to this question, a cup of coffee has 71 mL of coffee and 127 mL of water. This means that, the total volume of coffee solution is;
71mL + 127mL = 198mL
% volume = 71/198 × 100
= 0.359 × 100
Percent volume of coffee solution = 35.9%
If [H3O^ + ]=1.7*10^ -3 M what is the pOH of the solution?
Answer:
The pOH of the solution is 11.23.
Explanation:
To solve this problem, we must remember the following formula for pH: pH = -log[H+].
If we plug in the value we are given, we can find the pH.
pH = -log[H+]
pH = -log(1.7*10^-3)
pH = 2.77
To find the pOH, we use the following formula:
pH + pOH = 14
To solve, we should plug in the value we found above for pH and solve for the pOH.
2.77 + pOH = 14
pOH = 11.23
Therefore, the correct answer is 11.23.
Hope this helps!
Which index fossil in sedimentary surface bedrock most likely indicates that a marine
environment once existed in the region where the sediments were deposited?
Answer:
Which index fossil in sedimentary surface bedrock most likely indicates that a marine environment once existed in the region where the sediments were deposited? The timeline below represents the entire geologic history of Earth. The lettered dots on the timeline represent events in Earth's history.
Explanation:
Plz mark me as a brainlist
A student tests a solid sample of a compound and determines that it does not conduct electric
current. When the
compound is dissolved in water, the solution does conduct electric current
What type of bonding does the compound have?
a.non polar covalent
b.ionic
c.polar covalent
d.metallic
Answer:
A
Explanation:
because they are non polar so would not conduct electricity :)
The type of bonding does the compound have non polar covalent.
What is non polar covalent?A non-polar covalent bond is just a sort of chemical bond that occurs when two atoms share electrons evenly. As a result, the count of electrons shared by neighboring atoms in an atom would be identical.
What is compound?A compound would be a material made up of two or maybe more chemical elements that have been chemically bonded together.
They still wouldn't conduct electricity even though they can non-polar.
Therefore, the correct answer will be option (A).
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Write a balanced equation state the reaction type, and perform the requested stoichiometry: Carbon and hydrogen combine to form
methane. How many grams of carbon would be needed to react with 30.2 grams of hydrogen?
Answer:
C + 2H2 = CH4
Given 30.2g of H2
Find the Moles
Mole =Mass/Molar Mass
Molar Mass of H2 = 1x2 = 2g/mol
Mole = 30.2/2
= 15.1moles of Hydrogen gas.
Now from the balanced equation of Reaction above...
1mole of Carbon reacts completely with 2moles of Hydrogen gas.
"x" moles of carbon with react with 15.1moles of Hydrogen
x = 15.1/2
=7.55moles of carbon.
We now have moles of carbon.
To find mass
Mole =Mass/Molar Mass
Mass = Mole x Molar Mass
Molar mass of carbon = 12g/mol
Mass = 7.55 x 12
Mass = 90.6g of carbon is needed.
please help bbg'sssss
Answer:
Explanation:
from the way the trees look, i would say A: Wind from the sky, it seems B: Clouds and in the distance C:Precipitation(rain)
What is the number of Co2 in a 220 gram
