fill in the missing information in the following table. phpohacidic, basic or neutral? solution a9.66 4.34 m m phpohacidic, basic or neutral? solution b m m phpohacidic, basic or neutral? solution c 0.023 m m phpohacidic, basic or neutral? solution d 12.77 1.23 m
Answers
Given that p h is equal to 9.61 in the first half ,We are aware that 14 points equals p + h + p + o. Therefore, p o h will now equal 14 – 9.61, or 4.31 – 4.39.
we may calculate the concentration of h, which would be 10 power plus that and p h, which is 10 power, 9 less 9.61. We will receive 2.5 power 10 multiplied by negative 10 m n. This is a concentration of h plus, and now a concentration of o h minus, which is 10 power minus p, o h, or 10 power minus 4.39. This is fundamental and equals 4 points, 1 to the tenth power minus 5 m. And those are the get 5.54. Now that we know the answers, we may get ph by dividing 14 by p, o h, or 5.54, to get 8.46. These thus are the responses for the b section. Moving on to the c component, it is assumed that h plus equals 2.4 times 10 power divided by 2 m. Therefore, we are aware of the equation h + o h. Minus is a power of ten. Negative 14 points, so we'll get o h from here. Minus is a power of ten. We will receive 4.2 multiplied by 10 power minus 13 mont when we divide minus 14 by 2.4 and multiply the result by 10 power minus 2 point.
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Related Questions
what is a mixture of elements and compounds
Answers
The substance in the image above would be classified as a mixture of elements (option E).
What is a compound and mixture?A compound is a substance formed by chemical bonding of two or more elements in definite proportions by weight.
On the other hand, a mixture is made when two or more substances are combined, but they are not combined chemically.
According to this question, an image is shown with two different substances or elements as distinguished by coloration (white and purple). These elements are combined but not chemically bonded, hence, is a mixture.
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What is the difference between Quantitative and Qualitative?
Answers
A tank whose volume is 100 gallons initially contains 50 gallons of pure water. A solution containing 8 grams of salt per gallon flows into the tank at a rate of 3 gallons per minute. The well stirred mixture flows out at a rate of 2 gallons per minute. Find the concentration of the salt in the tank when water starts to overflow.
Answers
The concentration of salt in the tank when water starts to overflow is 12 grams per gallon.
To find the concentration of salt in the tank when water starts to overflow, we need to determine the amount of salt in the tank at that point and divide it by the total volume of water.
First, let's calculate the amount of salt that flows into the tank per minute:
8 grams of salt per gallon * 3 gallons per minute = 24 grams of salt per minute.
Next, let's calculate the amount of water that flows out of the tank per minute:
2 gallons per minute.
The net change in the volume of water in the tank per minute is:
3 gallons per minute - 2 gallons per minute = 1 gallon per minute.
Since the initial volume of water in the tank is 50 gallons and the net change in volume is 1 gallon per minute, the time it takes for the water to overflow is:
(100 gallons - 50 gallons) / 1 gallon per minute = 50 minutes.
Therefore, after 50 minutes, the tank will overflow.
To find the concentration of salt in the tank at that point, we need to calculate the total amount of salt in the tank after 50 minutes:
24 grams per minute * 50 minutes = 1200 grams.
The total volume of water in the tank is 100 gallons, and since the tank overflows after 50 minutes, the amount of water in the tank is 100 gallons.
Therefore, the concentration of salt in the tank when water starts to overflow is:
1200 grams / 100 gallons = 12 grams per gallon.
So, the concentration of salt in the tank when water starts to overflow is 12 grams per gallon.
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Which statement best explains what causes the phase change from solid ice to liquid water?
a.Heat is released as ice turns into liquid water.
b.The mass increases when ice turns into liquid water.
c.Heat is absorbed as ice turns into liquid water.
d.The hydrogen bonds prevent the absorption of heat.
Answers
if the equivalence point is reached after 22.0 ml, what is the original concentration of hno3?
Answers
The original concentration of HNO3 is 0.11 M.
The equivalence point is the point in the titration process where the amount of reactant in one solution is chemically equivalent to the amount of reactant in the other solution.
In acid-base titrations, the equivalence point is the point at which the acid and the base are neutralized and the pH is equal to 7.0 (neutral).The given question is related to titration.
To find the original concentration of HNO3, we need to know the volume of NaOH solution added to the acid in the titration process and the molarity of NaOH solution.
Using these data, we can calculate the moles of NaOH used in the titration. Since the reaction between HNO3 and NaOH is a 1:1 ratio, we can find the moles of HNO3 present in the original solution.
From this, we can calculate the original concentration of HNO3.Let’s assume that the molarity of NaOH solution is x M and the volume of NaOH solution added is 22.0 ml.
According to the balanced chemical equation of the reaction between HNO3 and NaOH,1 mole of HNO3 + 1 mole of NaOH → 1 mole of NaNO3 + 1 mole of H2O
Moles of NaOH used in titration = (22.0 ml) (x M) = 22x/1000 moles
Moles of HNO3 present in original solution = moles of NaOH used in titration = 22x/1000 moles
Assuming the initial volume of HNO3 is 25.0 ml, the moles of HNO3 present in the original solution would be calculated as follows:
Molarity (M) = moles/volume (L)Initial moles of HNO3 = M × V = (22x/1000) moles
Moles of HNO3 present in the original solution = (22x/1000) moles - (1/2) × (22x/1000) moles = 11x/1000 moles
Initial volume of HNO3 = moles/M = (11x/1000) moles / (25/1000) L = (11/25) L = 0.44 L = 440 ml
Therefore, the original concentration of HNO3 is 0.11 M.
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In this experiment, calcium hydroxide was partially dissolved in pure water. Which of the following choices correctly expresses the relationship between [Ca2+] and [OH−] in this mixture?
[OH−] = [Ca2+]
[OH−] = 2[Ca2+]
[OH−] = 0.5[Ca2+]
[OH−] = 4[Ca2+]
Answers
The correct option that expresses the relationship between \([Ca^{2+}]\) and \([OH^{-}]\) in the mixture formed by partially dissolving calcium hydroxide in pure water is B \([OH^{-}] = 2 [Ca^{2+}]\).
The balanced chemical equation for the dissociation of calcium hydroxide is given below:
\(Ca(OH)_{2} = Ca^{2+} + 2 OH^{-}\)
Therefore, on partial dissolution, the concentration of \([Ca^{2+}]\) would be less than the concentration of \([OH^{-}]\), since it is a 1:2 ratio in the dissociation equation.
Hence, option b, \([OH^{-}] = 2 [Ca^{2+}]\), correctly expresses the relationship between \([Ca^{2+}]\)and \([OH^{-}]\)in this mixture formed by partially dissolving calcium hydroxide in pure water.
\([OH^{-}] = 2 [Ca^{2+}]\). Partial dissolution of calcium hydroxide in pure water gives the concentration of \([Ca^{2+}]\) less than the concentration of \([OH^{-}]\), as it is a 1:2 ratio in the dissociation equation, i.e., \(Ca(OH)_{2} = Ca^{2+} + 2 OH^{-}\).
Therefore, option b,\([OH^{-}] = 2 [Ca^{2+}]\) , correctly expresses the relationship between \([Ca^{2+}]\)and \([OH^{-}]\)in this mixture formed by partially dissolving calcium hydroxide in pure water.
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If the equation: FeCl3+O2-->Fe2O3+Cl2, how many moles of chlorine gas can be produced if 4 moles of FeCl3 react with 4 moles of O2?
Answers
Answer:
6 moles of Cl2
Explanation:
First, the equation has to be balanced, which makes it 4 FeCl3 + 3 O2 --> 2 Fe2O3 + 6 Cl2
Using this information, we can see that one mole of O2 will not be present in the reaction. Since four moles of FeCl3 are needed to react in the equation, which would produce six moles of Cl2, and only four moles of FeCl3 are present, six moles of Cl2 would be produced.
Starting with acetylene, show the reagents you would use to prepare the following compound: 2,7-dimethyl-4-octyne 1) NaNH2 2) Br 1) NaNH2 2) Br 3) NaNH2 4) Br 1) NaNH2 2) Br 3) NaNH2 4) EtBr 1) NaNH2 2) EtBr 3) NaNH2 4) Br
Answers
The liquid form of 1-octene has no color. Flashpoint of 70 °F. Less dense (at about 6 lb/gal) and insoluble in water than water, as a result, floats on water.
Having the chemical formula CH2CHC6H13, 1-octene is an organic compound. The double bond in the alkene is in the alpha (primary) position, making the compound more reactive and giving it useful chemical properties. The alkene is also referred to as a higher olefin and alpha-olefin.
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Potential energy is based on an objects
A)gravity
B)mass
C)position
D)kinetic
Answers
Answer:
c
Explanation:
because potential energy is created with the position of a body when you pick up something the thing will have stored energy which is transferred from you so the stored energy is potential energy created by the position of a body that when you see over your head you scared of that thing not to bit you because it has stored energy if you see the thing already failed on the ground you wouldn't scared of that because the enery is already gone
Hope help you
Question 6
Which of the following is a base?
O hand soap
O gastric juices
O water
O orange juice
Answers
Among the options listed, water is the base.
A base is a substance that has a high pH and can accept protons or donate hydroxide ions (OH-) in a chemical reaction. Water fits this definition as it has a neutral pH of 7, making it neither an acid nor a base. However, water can act as a base by accepting protons from strong acids to form hydronium ions (H3O+).On the other hand, hand soap is typically formulated to be slightly acidic, around pH 5.5 to 6.5, to match the skin's natural acidity. Gastric juices, such as stomach acid, are highly acidic with a pH ranging from 1 to 3, necessary for digestion.
Orange juice is also acidic, typically having a pH range of 3 to 4.5, due to the presence of citric acid.While water can exhibit both acidic and basic properties depending on the context, it is considered neutral in its pure form with a pH of 7. It can act as a base when reacting with stronger acids. Water's ability to dissociate into hydronium and hydroxide ions makes it amphoteric, meaning it can behave as both an acid and a base.
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Among the options provided, water (H2O) is considered a base.
What is Bronsted-Lowry theory ?According to the Bronsted-Lowry hypothesis, which categorizes bases as proton acceptors and acids as proton donors, water can function as a base by taking a proton to form the hydroxide ion (OH-), which is an anion. Pure water has a limited amount of water molecules that dissociate to form H+ and OH- ions, which creates a mildly basic solution.
Therefore, In some situations, water may be regarded as a base.
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Which set of numbers will balance the following equations? 1's have been included for clarity.__Mn3N4 + __NaF --> __MnF4 + __Na3N a 1; 4; 1; 4 b 1; 4; 3; 2 c 1; 12; 3; 4 d 3; 2; 3; 2
Answers
ANSWER
Option C
EXPLANATION
Given that;
\(\text{ ----- Mn}_3N_4\text{ }+\text{ ---- NaF }\rightarrow\text{ ---- MnF}_4\text{ }+\text{ ---Na}_3N\)In the reaction above, we have the following data
At the reactants side;
3 atoms of manganese
4 atoms of nitrogen
1 atom of sodium
1 atom of fluorine
At the products side
1 atom of manganese
4 atoms of fluorine
3 atoms of sodium
1 atom of nitrogen
To balance the above equation, apply the law of conservation mass
Law of conservation of mass states that matter can neither be created nor destroyed but can e transformed from one formato another.
To balance the equation, 1 mole of Mn3N4 reacts with 12 moles of Na Tto give 3 moles of MnF4 and 4 moles of Na3N
So, the new equation becomes
\(\text{ Mn}_3N_4\text{ }+\text{ 12NaF }\rightarrow\text{ 3MnF}_4\text{ }+\text{ 4Na}_3N\)The following data can be deduced in the above equation
At the reactants side
3 atoms of Mn
4 atoms of N
12 atoms of Na
12 atoms of F
At the products side
3 atoms of Mn
12 atoms of F
12 atoms of Na
4 atoms of N
Looking atthe vabove data, the number of atoms of each element at the reactants side is equal to the number of atoms of same elements at the products side.
Hence, the correct answer is option Ce
u
Which factor most often affects wind and weather patterns on Earth?
Answers
Answer:
i think its solar radiation
first to answer correctly gets brainleist
Answers
A solution has [H3O+] = 2.8x10-5 M. Use the ion product constant of water K. = [H30 - ) [OH-] to find the [OH-] of the solution. Express your answer to two significant figures.
Answers
Answer:
Approximately \(3.6 \times 10^{-10}\; {\rm M}\), assuming that the solution is dilute and is at room temperature (such that \(K_\text{w} = 10^{-14}\).)
Explanation:
Look up the ion product constant of water:
\(K_{\text{w}} \approx 10^{-14}\).
In a dilute solution where water is the solvent, the product of \([{\rm {H_{3}O}^{+}}]\) and \([{\rm {OH}^{-}}]\) (concentration of \(\rm {H_{3}O}^{+}}\) ions and \({\rm {OH}^{-}}\) ions) is constantly equal to \(K_{\text{w}}\). (The unit of both \([{\rm {H_{3}O}^{+}}]\!\) and \([{\rm {OH}^{-}}]\!\) need to be \({\rm M}\).) In other words:
\([{\rm {H_{3}O}^{+}}]\, [{\rm {OH}^{-}}] = K_{\text{w}}\).
Rearrange this equation to find \([{\rm {OH}^{-}}]\) in terms of \(K_{\text{w}}\) and \([{\rm {H_{3}O}^{+}}]\):
\(\begin{aligned}[] [ {\rm OH^{-}} ] &= \frac{K_{\text{w}}}{[{\rm {H_{3}O}^{+}}]} \\ &= \frac{10^{-14}}{2.8 \times 10^{-5}} \\ &\approx 3.6 \times 10^{-10}\end{aligned}\).
(a) When a UV spectrophotometer reports an absorbance of 1.0, what percent of the incident UV light is absorbed by the sample? (b) What percent of the incident light is absorbed when A = 2.0? (c) When A = 0.5?
Answers
a) An absorbance of 1.0 in a UV spectrophotometer corresponds to the absorption of 90% of the incident UV light by the sample.
b) An absorbance of 2.0 corresponds to the absorption of 99% of the incident UV light by the sample.
c) An absorbance of 0.5 corresponds to the absorption of 30% of the incident UV light by the sample.
These values are derived from the Beer-Lambert Law, which relates the absorbance of a sample to the concentration of the absorbing species in the sample and the path length of the light through the sample. For a fixed path length, the absorbance is directly proportional to the concentration of the absorbing species. At low concentrations, the relationship between absorbance of light and concentration of solution is linear, and the percentage of light absorbed is directly proportional to the absorbance. At high concentrations, the relationship between absorbance of light and concentration of solution becomes non-linear and the percentage of light absorbed increases more rapidly with increasing absorbance.
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variable changed by the scientists what is being tested
Answers
Answer:
Hope this is helpful to you!
The independent variable is the one that is changed by the scientist. To insure a fair test, a good experiment has only ONE independent variable. As the scientist changes the independent variable, he or she records the data that they collect.
Answer:
The independent variable is the one that is changed by the scientist. To insure a fair test, a good experiment has only ONE independent variable. As the scientist changes the independent variable, he or she records the data that they collect.
Explanation:
PLEASE MARK ME BRAINLIEST AND FOLLOW ME TEJASWI HEREA chemical equation frequently indicates all of the following except the...
Select one:
a. chemical identity of all substances involved.
b. ratio of atoms in a molecule.
c. physical state of each substance involved.
d. rate or speed of the reaction.
Answers
A chemical equation frequently indicates all of the following except the ratio of atoms in a molecule.
Hence, Option B is correct answer.
What is Chemical Reaction ?A chemical reaction is a process in which chemical bonds between atoms to break and reorganize, to form other new substances.
What are the characteristics of Chemical Reaction ?Change in colorChange in state Evolution of gas Change in temperatureFormation of precipitateThus from the above conclusion we can say that A chemical equation frequently indicates all of the following except the ratio of atoms in a molecule.
Hence, Option B is correct answer.
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EARTH SCIENCE
When water gets warm, dissolved oxygen
increases.
is not effected.
decreases.
Answers
Answer:
decreases
Explanation:
warm water hold less dissolved oxygen than cold water because the molecules are moving faster.
What is the concentration of a sodium hydroxide solution if 14.5 mL of it are exactly neutralized by 30.0 mL of a 0.500 M hydrochloric acid solution?
Answers
Answer:
1.03 M
Explanation:
Step 1: Write the balanced equation
NaOH + HCl ⇒ NaCl + H₂O
Step 2: Calculate the reacting moles of HCl
30.0 mL (0.0300 L) of 0.500 M HCl react.
0.0300 L × 0.500 mol/L = 0.0150 mol
Step 3: Calculate the moles of NaOH that react with 0.0150 moles of HCl
The molar ratio of NaOH to HCl is 1:1. The moles of NaOH that react are 1/1 × 0.0150 mol = 0.0150 mol.
Step 4: Calculate the molar concentration of NaOH
0.0150 moles of NaOH are in 14.5 mL (0.0145 L).
M = 0.0150 mol/0.0145 L = 1.03 M
Tyler measured the force of his grip. Which is the most likely reading?
A.
190kg
B.
190N
C.
1 lb
D.
20,000 N
E.
5 seconds
F.
18mg
Answers
Answer:
190n
Explanation:
190 190 and because it is easy to understand if you didn't understand my answer ask any man
Arrange the steps in order to describe how photons and carbon dioxide (CO2) contribute to the warming of Earth.
CO2 in the atmosphere absorbs infrared
photons.
CO2 in the atmosphere emits infrared photons back toward Earth.
Photons from the Sun strike Earth and become infrared photons.
Earth radiates infrared photons into the atmosphere
The Sun radiates sunlight (visible)
photons
Answers
The Sun radiates sunlight (visible) photons
Photons from the Sun strike Earth and become infrared photons.
Earth radiates infrared photons into the atmosphere
CO2 in the atmosphere absorbs infrared photons.
CO2 in the atmosphere emits infrared photons back toward Earth.
Certain gases are known to contribute towards global warming. Such gases are called greenhouse gases. The infrared rays from the sun are absorbed by these gases as they are re-emitted from the earth and re-emitted.
The sun radiates photons to the earth which is re-radiated into outerspace from the earth's surface. CO2 and other greenhouse gases absorbs these gases and re-emit them to the earth thereby causing a gradually rise in the temperature of the earth called global warming.
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Did you write these compounds?
KBr
2 NH₂OH
2HNO3
Answers
The missing components of the neutralisation reaction include the following:
KBr KBr 2NH4OHKBr 2NH4OH2HNO2What is neutralisation reaction?Neutralisation reaction is defined as the type of reaction that leads to the formation of salt and water when an acid and a base reacts.
From the reactions given the missing components are replaced as follows:
HBr + KOH --> KBr + H2OH2SO4 + 2NH4OH --> (NH4)2SO4 + 2H2O2HNO3 + Mg(OH)2 --> Mg(NO3)2 + 2H2OLearn more about acids here:
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The amount of gas dissolved in solution tends to __ as the temperature decreases
Remain the same
Increase
Decrease
Answers
The amount of gas dissolved in solution tends to increase as the temperature decreases.
What is the ideal gas law?The ideal gas law describes the relationship between the amount of gas, temperature, pressure, and volume of an ideal gas. It states that the product of the pressure and volume of a gas is directly proportional to the number of gas molecules present (measured in moles), the temperature of the gas (measured in Kelvin), and a constant known as the gas constant (R). This can be expressed mathematically as PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is gas constant, and T is the temperature in Kelvin.
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Answer: Increase
Explanation:
An electrochemical cell that involves the reaction: cd(s) ni2 (aq) → cd2 (aq) ni(s) 1. Ni2 is oxidized and is the reducing agent 2. Cd is oxidized and is the reducing agent
Answers
This electrochemical cell is an example of a redox reaction, where the transfer of electrons between species results in a change in oxidation state.
Oxidation state, also known as oxidation number, is a concept in chemistry that describes the relative degree of electron loss or gain by an atom in a compound or ion. It is represented by a positive or negative number that indicates the number of electrons that an atom has lost or gained in a chemical reaction.
The oxidation state of an atom is determined by several factors, including its electronegativity, the number of valence electrons it has, and the number and types of bonds it forms with other atoms. In general, an atom with a higher electronegativity will have a more negative oxidation state, while an atom with a lower electronegativity will have a more positive oxidation state.
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You’re sitting at a car race and the cars sound differently when they approach as opposed to when they are moving away. Why might this be true? Explain in detail.
Answers
Answer:
I have no clue this qestion is kinda stumping but it a really good question it got me thinking but i don't know if there is a right answer
Explanation:
I don't know
Click on the image that most accurately represents a pure
compound.
Corre
Incor
Answers
Ethylene glycol is widely used as an automotive antifreeze. Its empirical formula is
CH3O. Its molar mass is approximately 60 grams per mole. What is its molecular
formula?
Answers
We obtain the molecular formula of the compound as C26O2..
What is the molecular formula?We have to know that the molecular formula is the kind of formula of the compound that can be able to help us to know the exact number of the atoms of each of the elements that we can be able to find in the compound. In the case of what we have in this case we have that;
[12 + 3(1) + 16]n = 60
n = 60/31
n = 2
The molecular formula that we can write for the compound that we have in this case is C26O2.
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In an experiment, 200.00 grams of Al2O3 was decomposed producing 77.18 grams of Al. Calculate the percent yield for this experiment?
Answers
Answer:
Explanation:
Molecular weight of Al: 27
Molecular weight of O: 16
Percentage composition of Al by weight in Al2O3
= (27*2) / (27*2 + 16*3)
= 0.5294
In 200 grams of Al2O3, there are
= 200*0.5294
= 105.88 grams of Al
77.18 grams of Al was produced in the experiment.
Percent yield for the experiment
= product mass / reactant mass * 100%
= 77.18 / 105.88 * 100%
= 72.89%
A compound called resveratrol is an antioxidant, found in the skin of grapes. Identify the functional groups in resveratrol. (12.1,12.3)
Answers
The skin of grapes contains an antioxidant called resveratrol. Determine the resveratrol functional groupings. Alcohol makes comprises the compound's functional group.
What is an alcohol ?An organic molecule known as an alcohol has at least one hydroxyl functional group attached to a saturated carbon atom. The major alcohol ethanol, which is used as a narcotic and is the main alcohol contained in alcoholic beverages, was the substance to which the term "alcohol" originally referred.
Resveratrol is a naturally occurring polyphenol that can be found in a variety of foods, including grapes, berries, peanuts, and several medicinal plants. It has a stilbene functional group in its molecular structure.
Thus, The skin of grapes contains an antioxidant called resveratrol. Determine the resveratrol functional groupings. Alcohol makes comprises the compound's functional group.
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Match each atomic combination to the appropriate functional group.
- A. B. C. D. C-O-C
- A. B. C. D. O=C-O-H
- A. B. C. D. O=C-O-C
- A. B. C. D. C-O-H
A. Alcohol
B. Carboxylic acid
C. Ester
D. Ether
Answers
Answer:
The atomic combinations can be matched to the appropriate functional groups as follows:
- A. C-O-C: C. Ester
- B. O=C-O-H: B. Carboxylic acid
- C. O=C-O-C: C. Ester
- D. C-O-H: A. Alcohol
Explanation: