Answers
So, what's shown here is the ion product of pure water: that is, the product of the concentrations of hydronium and hydroxide ions in pure water at 25 °C. By this relation, if you know the [H₃O⁺], you can calculate the [OH⁻], and vice-versa.
Since [H₃O⁺] × [OH⁻] = 1.0 × 10⁻¹⁴, [OH⁻] = (1.0 × 10⁻¹⁴)/[H₃O⁺].
Substituting the given [H₃O⁺] as 1.25 × 10⁻² M:
[OH⁻] = (1.0 × 10⁻¹⁴)/(1.25 × 10⁻² M) = 8.0 × 10⁻¹³ M.
Related Questions
What does the arrow in chemical equations mean? (PLEASE HELP)
A- Cancels
B- Subtracts
C- Prevents
D- Yields
Answers
Answer:
yields
Explanation:
I just did that quiz on k12 8th grade
Answer:
D
Explanation:
TOOK TEST ON K12
Letter C shows that some of the heat rising from the earth's surface is trapped by gases in the atmosphere and reflected back to earth. This is known as what?
Question 3 options:
Coriolis Effect
Solar Flares
Green House Effect
Windshield Effect
Answers
Answer:
green house effect
Explanation:
it works like a green house
when particles of unreactive .... collide, they bounce off each other at high speed without any loss of energy. What word is supposed to be filled in on the dots?
Answers
Answer:
Groups
Explanation:
The groups determine if the atom is reactive or not, take the Noble Gases for example, they are very very very unreactive.
Nadine was cooking a pot of potatoes on the stove. When the potatoes were don’t she needed to remove the potatoes for the water. Which separation technique would be most efficient and effective method for Nadine to use to achieve this
Answers
Answer:
boiling
Explanation:
Gaseous butano (CH,(CH),CH) will react with gaseous oxygen (0) to produce gaseous carbon dioxide (CO2) and goseous woter (11,0). suppose
20.9 g of butane is mixed with 54, 9 of oxypen. Calculate the minimum mass of butone that could be left over by the chemical reaction. Be sure your answer
has the correct number of significant digits.
Answers
Answer:
Firstly, We have to convert it in the Miles formula...
No. of moles = Mass given/Molar Mass
So, the final answer be come
Ans - 50.8 gm and there same % is 50.8% butane in reactionWhich best describes the type of Bond shown?
A. It is an ionic bond because electrons are being shared
B. It is a covalent bond because electrons are being shared
C. It is an ionic bond because electrons are being transferred
D. It is a covalent bond because electrons are being transferred.
please answer this no links please!!
Answers
Based on the nature of the types of chemical bonding, the example illustrates covalent bonding because electrons are shared between the carbon and hydrogen atoms.
Chemical bondingChemical bonding or combination occurs when atoms of elements combine to form products.
Chemical bonding can either be;
ionic bonding orcovalent bondingCovalent bondingCovalent bonding involves a sharing of electrons by the atoms of elements involved.
Since the example shows electrons being shared between carbon and hydrogen atoms, the example illustrates a covalent bonding because electrons are shared between the atoms.
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Which best describes a meniscus?
Answers
2567 milliliters to liters
Answers
Answer:
2.567 litres
Explanation:
I dont have a proper explanation sorry
How many Joules are there in 3301 calories? (1 cal = 4.18 J)
Answers
Answer:
13798.18 J
Explanation:
3301 cal * 4.18 J/1 cal = 13798.18
Recall that (1 cal = 4.18 J)
Speed can be though of as ____ the at which an object covers a _____.
A) speed,kilometer
B) Rate,distance
C) Forces, distance
D) Distance, rate
Pls help me with this question like now thank
Answers
Answer:
Speed can be thought of as the rate at which an object coverse distance
B) Reate distance
2 H2O(l) → 2 H2 (g) + O2 (g) ΔH°rxn = +572 kJ Determine the heat associated with the reaction (qrxn, in kJ) when 4.85 grams of H2(g) is produced.
Answers
The heat associated with the reaction (qrxn, in KJ) when 4.85 grams of H₂ is produced is +693.55 KJ
Balanced equation2H₂O → 2H₂ + O₂ ΔH°rxn = +572 KJ
Molar mass of H₂ = 2 × 1 = 2 g/mol
Mass of H₂ from the balanced equation = 2 × 2 = 4 g
SUMMARY
From the balanced equation above,
When 4 g of H₂ is produced, 572 KJ of heat where needed.
How to determine the heat requiredFrom the balanced equation above,
When 4 g of H₂ is produced, 572 KJ of heat where needed.
Therefore,
When 4.85 g of H₂ is produced = (4.85 × 572) / 4 = +693.55 KJ of heat will be required.
Thus, +693.55 KJ of heat is required for the reaction.
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when an ion has a positive charged what has the highest value of this ion ?
is it
proton
neutron
electron
nucleon
and why did you choose tte answer ?
Answers
Answer:
Highest charge +4ProtonExplanation:
Why +4?
Elements have valency starting from -4 to +4Point to be noted that only Carbon family elements can show +4 or -4 valencyWhich unit represents speed?
Joules
kilometers per second
miles per hour
newtons
(Pick ONE)
Answers
Answer:
1
Explanation:
Answer:
can be SI or also know miles per second.
Use the periodic table to answer the question.
A chemical reaction produces a molecule in which all of the atoms have a stable configuration. Which molecule could be the product of the reaction?
(1 point)
SiO
PH3
MgBr
KCl2
Answers
The product of this reaction is PH3. All of the atoms in PH3 have a stable configuration.
According to the octet rule, atoms are stable when they have two or eight electrons around their outermost shell. A stable configuration is one in which the outermost shell is fully filled with eight electrons.
The reason behind chemical combination is to enable atoms attain this stable configuration. If we look at the compound, PH3, we will notice that phosphorus has eight electrons around its outermost shell while each hydrogen atom has two electrons around its outermost shell hence all of the atoms have a stable configuration.
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Answer:ph3
Explanation:yeah
Plot the rate curved for the
Information Provided below and
Identity where the reaction is
Complete and peak of the reaction
Time in minutes 12345678
o
Volume of gas 0 5 10 15 20 25 30 30 35
Answers
Answer:
he combustion of ethane (C2H6) is represented by the equation: 2C2H6(g) + 7O2(g) 4CO2(g) + 6H2O(l). In this reaction: (a) the rate of consumption of ethane ...
Explanation:
he combustion of ethane (C2H6) is represented by the equation: 2C2H6(g) + 7O2(g) 4CO2(g) + 6H2O(l). In this reaction: (a) the rate of consumption of ethane ...
➪What Is an Acid?❦⭐⭐❦
Answers
Answer:
a chemical that burns stuff
Explanation:
acid is something that burns it like that it goes thru it
Answer:
Acid is a sour material which have pH value less than. 7
Suppose a scientist wants to test a new drug to fight the flu. The scientist injects the drug into 3 people with the flu. The scientist injects a harmless solution into three other people with the flu. In this experiment, what is the variable group and what is the control group?
Answers
Answer:
the people injected with the drug are the variable group while the people injected with the harmless solution are the control group
How deep is the real pond?
A. 24 cm
B. 63 cm
C. 18 cm
D. 7 cm
Answers
Answer:
24
Explanation:
The average size of most ponds is 10′ x 15′ (roughly 150 square feet) with the deepest point being 24″. If you have underwater shelves for plants they usually go 12″ down.
- BRAINLIEST answerer ❤️✌
At what temperature will water begin to boil
Answers
Answer:
water will boil at 100 celcius or 212 farenheit
please give brainliest
Answer:
At 100° C or 373.15K
Explanation:
A student is studying Earth's Layers. She is trying to determine how temperature and density change from one layer to another. Which relationship that exists between Earth's
Sversed the student mostly find
The temperature of Earth's layers decreases with depth while density increases with depth
The temperature of Earth's layers increases with depth while density decreases with depth
The temperature and density of Earth's layers decrease with depth
The temperature and density of Earth's layers increase with depth
Answers
Answer:
I believe it is D sorry if I am wrong
Explanation:
Answer:
D.
Explanation:
Convection currents in the atmosphere influence many weather patterns. What property of the air has the most influence on convection currents?
1. The direction of the wind
2. The velocity of the wind
3. The temperature of the air
4. The mass of the air
Answers
Convection currents are largely influenced by air temperature. A low-pressure area is produced when air is heated because it becomes less dense and rises.
What effect on the climate does convection have?For instance, the air above the Earth heats and rises as its surface warms from the sun. This air may continue to rise while cooling and producing cumulus clouds if the conditions allow.
How do air masses respond to convection currents?Climate-affecting wind patterns are driven by convection currents. Convection currents are used to shift air masses. There are two different kinds of air masses: warm and cold. From higher latitudes to lower latitudes, cold air masses travel.
To know more about temperature visit:-
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giuioiijihovicutxcvyg
Answers
Answer:
ajajbshdbrbxjdnd djxbxbx
Explanation:
hdjdndjsosnbdjdkx dkdmdbdjd
Nitroglycerine, used to treat patients with angina, is prescribed for a patient by IV at a rate of 2.10 x 102 ug/min. The IV bag
contains 50. mg nitroglycerine/250 mL D5W. How many milliliters per hour should the patient receive?
Answers
Answer:
thrieidjnfkoeow wlfofj3v3koeud3838rbcjr9r8enebbfjfddndndnd
type this code in command prompt and your computer will get crashed
What is the relationship between number of electrons on the outer energy levels and
groups?
Answers
Answer:
Every element in a given group has the same number of valence electrons. For elements in the main groups (1-2, and 13-18), the number of valence electrons increases when moving from left to right along any period (row). The noble gases contain a full valence electron shell, which consists of eight electrons.
Explanation:
Hope this helps.
Answer:
Valence Electrons
Explanation:
Say you are looking at a neutrally charged carbon atom, it has 6 electrons. The first electron shell can hold 2 electrons. The next can hold 8, the next can hold 8 and the next can hold ten and so on... Well in the Carbon atom case, it has 6 electrons, 6-2 is 4, so the carbon atom at 4 valence electrons, which actually helps it in making organic molecules, which in turn also helps make something you might have heard of before, organisms, the best example being, humans
which phrase is the best description of osmosis
Answers
movement of water from high potential to low potential
Which are examples of a phase change? (Select all that apply.)
melting chocolate
frying bacon
baking bread
freezing water
Answers
Answer:
It is melting chocolate and freezing water.
Explanation:
If your melting melting chocolate it would turn into a liquid and if you freeze
water then you are turning liquid to a solid.
Melting chocolate and freezing water are the examples of phase change.
What do you mean by phase change?A phase change is a change in the states of matter. For example, a solid may become a liquid. This phase change is called melting. When a solid changes into a gas, it is called sublimation.
A phase transition is the physical process of transition between one state of a medium and another. Commonly the term is used to refer to changes among the basic states of matter: solid, liquid, and gas.
There are eight thermal processes through which matter can attain phase change. They are melting, freezing, evaporation, condensation, sublimation, deposition, ionization, and recombination.
Learn more about phase change:
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What are three ways that the climatic factors of temperature and
sture affect rate of weathering?
Answers
Answer:
Generally, interactions with air, water and living organisms cause the weathering of rocks. Although there are two major types of weathering processes, physical weathering and chemical weathering cannot be separated, and they often work together at different rates to break large rocks into smaller pieces over time.
Explanation:
hope this helps if not sorry :)
Each atom consists of a central nucleus and several shells that contain electrons. The outermost electrons are called valence electrons. Most atoms are stable with a configuration of eight valence electrons. This is known as the octet rule. How many valence electrons does each atom have? * 1 point
Answers
Explanation:
Not only did outermost electron determine the valence electron, but also periodic table. whatever group they fall into in periodic table each valence electrons present in a particular atom e.g K and Ca belong to group 1 and 2 respectively and k has 1 and Ca have 2 in each outermost electron
Based on your observations, which equation best models the reaction of vinegar (C2H4O2) and baking soda (NaHCO3)? Explain.
"C" _"2" "H" _"4" "O" _"2" +"NaHC" "O" _"3" →"Na" "C" _2 H_3 "O" _"2" + "H" _2 "O"+"C" "O" _2
"C" _"2" "H" _"4" "O" _"2" +"NaHC" "O" _"3" →"Na" "C" _2 H_3 "O" _"2" + "H" _2 "O"+"O" _2
"C" _"2" "H" _"4" "O" _"2" +"NaHC" "O" _"3" →"Na" "C" _2 H_3 "O" _"2" + "H" _2 "O"+"H" _2
"C" _"2" "H" _"4" "O" _"2" +2"NaHC" "O" _"3" →"Na" "C" _2 H_3 "O" _"2" + "H" _2 "O"+"C" "O" _2
Answers
Answer:
A
Explanation:
Its a becuse vinegar and baking soda make carbon dioxide
The equation best models the reaction of vinegar (C2H4O2) and baking soda (NaHCO3) -
NaHCO3 + HC2H3O2 → NaC2H3O2 + H2O + CO2
The overall process can be summarized by the following word equation:
baking soda (sodium bicarbonate) reacts with vinegar (acetic acid) that yields carbon dioxide and water with sodium acetateThe chemical equation for the overall reaction is:NaHCO3 (s) + CH3COOH (l) → CO2(g) + H2O (l) + NaC2H3O2
The chemical reaction actually occurs in two steps. there is a double displacement reaction in which acetic acid in the vinegar reacts with sodium bicarbonate to form sodium acetate and carbonic acid: NaHCO3 + HC2H3O2 → NaC2H3O2 + H2CO3 Carbonic acid is unstable and undergoes a decomposition reaction to produce the carbon dioxide gas:H2CO3 → H2O + CO2
Thus, the equation best models the reaction of vinegar (C2H4O2) and baking soda (NaHCO3) -
NaHCO3 + HC2H3O2 → NaC2H3O2 + H2O + CO2
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ASAP PLEASE!
The speed of light is 2.998 m/s. What is the speed of light in km/hr.
Answers
Answer:
10.793 kilometres per hour