a solution with a ph greater than 7 is basic. a solution with a ph greater than 7 is basic. true false
Answers
The statement ' a solution with a ph greater than 7 is basic ' is true
pH can be described as a figure indicating the acidity or alkalinity of a solution on a logarithmic scale on which the neutral value is 7, lower values are more acidic, and higher values are more alkaline.
The pH is an abbreviation for potential hydrogen, and it reveals to us how much hydrogen is present in liquids and how active the hydrogen ion is.
A solution is considered to be basic if the pH is more than 7 because at these pH levels the OH− ion concentration is greater than the H+ ion concentration. This gives the solution basic properties including the potential to neutralize an acid.
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Related Questions
An ideal gas fills a balloon at a temperature of 227ºC and standard pressure. By what factor will the volume of the balloon change if the gas in the balloon is heated to 327ºC at standard pressure? Identify which gas law applies and show your work to receive full credit. Highlight the correct answer below. (2 points)
a. 227/327
b. 5/6
c. 6/5
d. 2/1
e. 327/227
Answers
Answer:
e. 327/227
Explanation:
This is the correct standard pressure.
How much acetone (C*H_{3}*COC*H_{3}) would be needed to obtain 7.85 L of acetone? The density of acetone is 0.851g / m * L
Answers
0.108 gram of acetone would be needed to obtain 7.85 L of acetone when density of acetone is 0.851g / mL.
What do you mean by the term mass ?Mass is the fundamental quantity and the basic property of matter. It is define as the measure of the amount of matter in a body.
The SI unit of mass is Kilogram (kg).
Given:
Volume of acetone = 7.85 L
The density of acetone = 0.851g / mL
Mass = ?
The formula of mass is as follows:
Mass = Density/volume
Substitute the given values in above equation and we get,
Mass = 0.851 / 7.85
Mass = 0.108 gram
Thus, 0.108 gram of acetone would be needed to obtain 7.85 L of acetone.
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The question is in the photo✨✨✨(Sorry) In the answer: Please leave all the numbers after the decimal point
Answers
36.2L of N2 can be produced.
1st) According to the stoichiometry of the reaction, 2 moles of NaN3 produce 3 moles of N2. Using the molar mass of NaN3 (65.0g/mol ) and N2 (28.0g/mol) we can convert the moles to mass, and we can see that with 130.0g of NaN3 we can produce 84.0g of N2.
Now, we can use a mathematical rule of three to calculate the grams of N2 that can be produced from 71.0g of NaN3:
\(\begin{gathered} 130.0gNaN_3-84.0gN_2 \\ 71.0gNaN_3-x=\frac{71.0gNaN_3\cdot84.0gN_2}{130.0gNaN_3} \\ x=45.9gN_2 \end{gathered}\)So, 45.9g of N2 are produced from 71.0g of NaN3.
2nd) It is necessary to convert the grams of N2 produced to moles, so we can use it in the Ideal gas equation:
\(\begin{gathered} 28.0gN_2-1mol \\ 45.9gN_2-x=\frac{45.9gN_2\cdot1mol}{28.0gN_2} \\ x=1.6\text{mol} \end{gathered}\)Now we know that 1.6mol of N2 are produced.
3rd) To calculate the volume of N2, it is necessary to use the Ideal gas equation and replace the values of Pressure (P), Temperature (T, in Kelvin) and Number of moles (n):
\(\begin{gathered} P\mathrm{}V=n\mathrm{}R\mathrm{}T \\ 1.30\text{atm}\cdot V=1.6\text{mol}\cdot0.082\frac{atm\cdot L}{mol\cdot K}\cdot359K \\ V=\frac{1.6mol\cdot0.082\frac{atm\cdot L}{mol\cdot K}\cdot359K}{1.30\text{atm}} \\ V=36.2L \end{gathered}\)Finally, 36.2L of N2 can be produced from 71.0g of NaN3.
How much did the total amount of discarded clothing and other fabrics increase from 1960
to 2018?
Answers
Answer:
Around 17,000,000 or a little more than that
A gene or trait that appears or expresses itself over a recessive trait is called the anstwer
Answers
A mixture of 90. 0grams of ch4 and 10. Ograms of argon has a pressure of 250 torr under the condition of constant temperature and pressure the partial pressure of ch4 is
Answers
The partial pressure of CH₄ in the mixture is 239 torr.
We can use the mole fraction of methane (CH4) to calculate its partial pressure in the mixture. First, we need to convert the masses of each component into moles:
moles of CH₄ = 90.0 g / 16.04 g/mol = 5.61 mol
moles of Ar = 10.0 g / 39.95 g/mol = 0.250 mol
Next, we can calculate the total moles of gas in the mixture,
total moles = moles of CH₄ + moles of Ar = 5.61 mol + 0.250 mol = 5.86 mol
Now we can calculate the mole fraction of CH₄,
mole fraction of CH₄ = moles of CH₄ / total moles = 5.61 mol / 5.86 mol = 0.957
Finally, we can use the mole fraction and total pressure to calculate the partial pressure of CH₄,
partial pressure of CH₄ = mole fraction of CH₄ x total pressure = 0.957 x 250 torr = 239 torr
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please help me with the second image questions it is really important and I really need it please help me out and provide me the answers for the second image two questions, looking at the first image please.
Answers
Answer:
is this exam.. are you coping..
Please answer the questions in the picture below
Answers
Answer b
Explanation:
A 10.0 g sample of a gas occupies 7.69 L at 1.00 atm and 27.0 C. The gas has been determined to be diatomic. What is the gas
Answers
ANSWER
EXPLANATION
Given that
The mass of the gas is 10.0g
The volume of the gas is 7.69L
The pressure of the gas is 1.00 atm
The temperature of the gas is 27 degrees Celcius
Follow the steps below to find the molar mass of the gas
Step1; Assume the gas is an ideal gas
\(\text{ Pv = nRT}\)Step 2; Find the number of mole of the gas using the equation above
\(\begin{gathered} \text{ T K = t}\degree C\text{ + 273.15} \\ \text{ T K = 27 + 273.15} \\ \text{ T K = 300.15K} \end{gathered}\)\(\begin{gathered} \text{ R is 0.0825 L.atm . K}^{-1}\text{ mol}^{-1} \\ \text{ 1 }\times\text{ 7.69 = n }\times\text{ 300.15 }\times\text{ 0.08205} \\ \text{ 7.69 = n24.627} \\ \text{ Divide both sides by 24.627} \\ \text{ n = }\frac{7.69}{24.627} \\ \text{ n = 0.312 moles} \end{gathered}\)Step 3; find the molar mass of the sample
\(\begin{gathered} \text{ mole = }\frac{\text{ mass}}{molar\text{ mass}} \\ \text{ cross multiply} \\ \text{ mass = mole x molar mass} \\ \text{ molar mass =}\frac{mass}{\text{ mole}} \\ \\ \text{ molar mass = }\frac{10}{0.312} \\ \text{ molar mass = 32.05} \end{gathered}\)what is the name for KCI in chem?
Answers
Answer:
Potassium Chloride
Explanation:
this is a compund and K is potassium and when u add the chlorine it is gonna have the ide
Answer: Potassium Chloride
Explanation: It is a binary compound, meaning that it only has 2 compounds in the equation.
Balanceo
Al + HCl AlCl3 + O2
Answers
Answer:
pls writ question well
Explanation:
I don't get
x and Z are elements in Period 3.They form the compound 2x_(2) ,which has the Lewis structure shown here. Identify elements x and Z
Answers
According to the Lewis Structure, X could be Boron or Aluminum and Z could be Carbon or Silicon.
We need to identify the elements whose atoms have two and four valence electrons, respectively. The elements in period 3 that have two valence electrons are B (Boron) and Al (Aluminum), while those with four valence electrons are C (Carbon) and Si (Silicon).
Since X has two dots around it, it is either Boron (B) or Aluminum (Al).On the other hand, since Z has four dots, it is either Carbon (C) or Silicon (Si).
Therefore, the elements X and Z are either Boron and Carbon (BC) or Aluminum and Silicon (AlSi).
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is it convection or conduction?
Answers
Answer:
They are both words, so it depends on when you use it.
Explanation:
con·duc·tion
/kənˈdəkSH(ə)n/
Learn to pronounce
noun
the process by which heat or electricity is directly transmitted through a substance when there is a difference of temperature or of electrical potential between adjoining regions, without movement of the material.
con·vec·tion
/kənˈvekSH(ə)n/
Learn to pronounce
noun
the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.
Answer:
what is conversation orconduction but I like conversation better.
Those who answer this I will make as brainliest.
Q. At room temperature, one liter of water can dissolve around 360 grams of salt.How much salt will remain on the bottom of the beaker if 250 grams of salt bedissolved in 580 ml of water as it becomes saturated solution of salt.
Don’t write answer only. Show your working clearly.
Answers
Answer: 41.2 grams will remain undissolved
Explanation: The solubility for the salt is 360 g/liter, or 0.36 g/ml. (Based on the word "around" which I take as the limit of solubility).
Thus, if we have 580 ml, (0.36g/ml)*(580ml) = 208.8 grams dissolve.
(250g - 208.8g) = 41.2 grams undissolved.
A 26.5 g sample of nitrogen, N2 , has a volume of 50.0 L and a pressure of 640. mmHg . express answer in three sig figsWhat is the temperature of the gas in kelvins?What is the temperature of the gas in degrees Celsius?
Answers
To answer this question we have to usethe ideal gas law:
\(PV=nRT\)Where P is the pressure, V is the volume, n is the number of moles, R is the constant of ideal gases (0.082atmL/molK) and T is the temperature (in Kelvin degrees).
The first step is to convert the given mass of N2 to moles using its molecular mass:
\(26.5gN_2\cdot\frac{molN_2}{28gN_2}=0.95molN_2\)And convert the pressure from mmHg to atm (1atm=760mmHg):
\(640mmHg\cdot\frac{1atm}{760mmHg}=0.84atm\)Finally, solve the initial equation for T and replace for the given values:
\(\begin{gathered} T=\frac{PV}{nR} \\ T=\frac{0.84atm\cdot50.0L}{0.95mol\cdot0.082atmL/molK} \\ T=539.15K \end{gathered}\)The temperature of the gas is 539.15K.
Convert this temperature to Celsius by substracting 273.15 to the temperature in Kelvins:
\(T=539.15-273.15=226\)The temperature of the gas is 226°C.
A) acetyl-COA; B) ATP; C) CO2; D) NADH C ) 35. Depletion of which of the following molecules from the mitochondria will most directly inhibit the citric acid cycle? A) NAD""; B) NADH; C) CO2; D) ATP lungococcocic driven bychomioma
Answers
Depletion of NAD⁺ from the mitochondria will most directly inhibit the citric acid cycle.
The citric acid cycle or the Krebs cycle or the tricarboxylic acid cycle (TCA cycle) is a metabolic pathway that happens in the mitochondria of eukaryotic cells. This cycle consists of eight chemical reactions in which the acetyl-CoA molecule (a two-carbon molecule) is oxidized to form ATP and other products. During the citric acid cycle, a series of redox and decarboxylation reactions occur.
The enzyme pyruvate dehydrogenase converts pyruvate to acetyl-CoA, which is required to enter the TCA cycle. The process of converting pyruvate to acetyl-CoA requires the participation of coenzyme A, NAD⁺, and the enzyme pyruvate dehydrogenase.
As acetyl-CoA enters the TCA cycle, it combines with oxaloacetate to form citrate. This reaction is catalyzed by the enzyme citrate synthase. During the citric acid cycle, a series of oxidation-reduction reactions take place, and NAD+ and FADH₂ act as electron carriers in this process.
Moreover, depletion of NAD+ from the mitochondria will inhibit the citric acid cycle by inhibiting the conversion of succinate to fumarate, which is catalyzed by succinate dehydrogenase. Succinate dehydrogenase is an enzyme that is involved in both the citric acid cycle and the electron transport chain.
Therefore, if NAD⁺ gets depleted from the mitochondria, then it will inhibit the citric acid cycle.
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Which of the following contribute(s) to most of the mass of an atom?
O A) Protons and electrons
B) Protons only
C) Protons and neutrons
OD) Neutrons only
Answers
Answer:
C) protons and neutrons
Explanation:
im pretty sure it is c
an unstable nucleus exhibits radioactivity; i.e., it spontaneously disintegrates or by emitting particles and/or electromagnetic .
Answers
An unstable nucleus undergoes radioactivity, which refers to the spontaneous disintegration of the nucleus or the emission of particles and/or electromagnetic radiation. Radioactivity is a natural process that occurs in certain atomic nuclei that are inherently unstable. These nuclei strive to attain stability by undergoing radioactive decay, which can involve the emission of alpha particles, beta particles, gamma rays, or a combination thereof.
Unstable nuclei contain an imbalance in the number of protons and neutrons, making them energetically unstable. In order to reach a more stable configuration, these nuclei undergo radioactive decay. This process involves the spontaneous transformation of the nucleus, where it disintegrates or emits particles and/or electromagnetic radiation.
There are several types of radioactive decay. One type is alpha decay, where an alpha particle consisting of two protons and two neutrons is emitted from the nucleus. Another type is beta decay, which can occur in two forms: beta-minus (β-) decay and beta-plus (β+) decay. In beta-minus decay, a neutron within the nucleus is converted into a proton, and an electron (beta particle) is emitted. In beta-plus decay, a proton in the nucleus is converted into a neutron, and a positron (positive beta particle) is emitted.
Additionally, radioactive decay can also involve the emission of gamma rays. Gamma rays are high-energy photons that are released during the transition of the nucleus to a lower energy state. These rays are a form of electromagnetic radiation.
Overall, the radioactivity of an unstable nucleus manifests through the spontaneous disintegration of the nucleus or the emission of particles (alpha and beta particles) and/or electromagnetic radiation (gamma rays). The specific type of radioactive decay that occurs depends on the characteristics and composition of the unstable nucleus.
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a 0.465 g sample of an unknown compound occupies 245 ml at 298 k and 1.22 atm. what is the molar mass of the unknown compound in grams per mole?
Answers
A 0.465 g sample of an unknown compound occupies 245 mL at 298 K and 1.22 atm. The molar mass of the unknown compound in grams per mole is 42.27 g/mol.
The volume = 245 mL = 0.245 L
The temperature =298 K
The pressure = 1.22 atm
The ideal gas equation is as follows :
P V = n R T
Where
n = number of moles
R = 0.082 L atm / K mol
n = P V / R T
n = ( 1.22 × 0.245 ) / ( 0.082 × 298 )
n = 0.011 mol
The mass of the sample = 0.465 g
The molar mass = mass / moles
The molar mass = 0.465 / 0.011
The molar mass = 42.27 g/mol
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The equation for the synthesis of water is given below.
2
H
2
+
O
2
→
2
H
2
O
How many grams of oxygen gas are needed to produce 36.0 grams of water?
Answers
Answer:
32g grams of oxygen gas is needed to produce 36.0 grams of water
HELP THIS IS FOR CHEM!! If the pull force is 898N and the friction force is 335N what is the net force?
Answers
Answer:
Explanation:
What provides the energy to set the water cycle in motion?
Nothing, the water cycle does not need energy.
Clouds
Sun
Water.
Answers
.Using disinfectant chemicals will not affect the long term use of scissors and other sharp objects. False or true?
Answers
False. Using disinfectant chemicals can actually have a negative effect on the long term use of scissors and other sharp objects.
While disinfectants are great for killing germs and bacteria, they can also cause damage to the metal surfaces of scissors and other sharp objects, causing them to rust or corrode over time. This can ultimately lead to dull blades and a shorter lifespan for the tools. It's important to properly clean and disinfect scissors and other sharp objects, but it's equally important to be mindful of the chemicals used and to follow manufacturer's instructions for proper maintenance and care. To ensure the longevity of your scissors and other sharp objects, it's recommended to wipe them down with a mild disinfectant solution and to dry them thoroughly after each use. Additionally, storing them in a dry, clean place can also help to prevent damage.
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why do metals tend to lose electrons to form positive ions?
Answers
Answer:
metals tend to lose electrons to form positive ions because they have more protons than electrons.
If you started with 2 moles of Nitrogen and 3 moles of Hydrogen, then you
would not have any leftover reactants. Explain which material would be
limiting since no hydrogen or nitrogen were left over?
N2 + 3H2 -> 2NH3
Answers
Answer: 0.3 moles NH3
Explanation:
The reaction between a strong acid and a weak base produces a salt, but water is not usually formed because:
the reaction is too hot and water evaporates
there is no hydrogen present to form water
the acid is not strong enough to form water
weak bases tend not to be hydroxides
Answers
Answer:
3
Explanation:
If 56 grams of carbon monoxide burns in oxygen to produce 88 grams of carbon dioxide, the mass of oxygen involved in the reaction is
grams.
Answers
The answer is 32 grams!
hope I helped
how long in hours would it take to deposit 41.37 g of cd from an aqueous solution of cd 2 with a current of 2.192 a?
Answers
It would take approximately 4.15 hours (14930.5 s / 3600 s/h) to deposit 41.37 g of Cd from an aqueous solution of Cd²⁺ with a current of 2.192 A.
To calculate how long in hours it would take to deposit 41.37 g of Cd from an aqueous solution of Cd²⁺ with a current of 2.192 A, we need to use Faraday's law of electrolysis.
First, we need to calculate the number of moles of Cd²⁺ ions that will be deposited using the formula:
moles of Cd²⁺ = mass of Cd / molar mass of Cd
The molar mass of Cd is 112.41 g/mol, so:
moles of Cd²⁺ = 41.37 g / 112.41 g/mol
moles of Cd²⁺ = 0.368 mol
Next, we need to use Faraday's law of electrolysis, which states that the amount of a substance deposited or liberated during electrolysis is directly proportional to the amount of electricity passed through the electrolyte.
The formula for Faraday's law is:
mass of substance deposited = (current × time × molar mass) / (charge × 1000)
Where:
- current is the current used during electrolysis, in amperes (A)
- time is the time that the current is applied, in seconds (s)
- molar mass is the molar mass of the substance being deposited, in grams per mole (g/mol)
- charge is the charge on one mole of electrons, which is equal to the Faraday constant, 96,485 C/mol
Using the values we have, we can rearrange the formula to solve for time:
time = (mass of substance deposited × charge × 1000) / (current × molar mass)
Plugging in the values we have:
time = (0.368 mol × 96,485 C/mol × 1000) / (2.192 A × 112.41 g/mol)
time = 14930.5 s
Therefore, it would take approximately 4.15 hours (14930.5 s / 3600 s/h) to deposit 41.37 g of Cd from an aqueous solution of Cd²⁺ with a current of 2.192 A.
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following. felewing 19 kilametere ner hour? (Round your answor to ane cecimal pisce.) IPm
Answers
The average speed is approximately 19.0 kilometers per hour.
When we say the average speed is approximately 19.0 kilometers per hour, it means that over a given time period, the object or person in question traveled a total distance of 19.0 kilometers divided by the total time it took to cover that distance. In this case, the given speed is 19 kilometers per hour.
To calculate the average speed, we use the formula:
Average Speed = Total Distance / Total Time
In the given question, the speed is already mentioned as 19 kilometers per hour. So, we can conclude that the total distance covered is 19 kilometers.
However, to find the total time taken, we need more information. The question only provides the speed but not the duration of the journey. Without knowing the total time, we cannot determine the average speed accurately. Therefore, in the absence of further information about the time, we can only state that the average speed is approximately 19.0 kilometers per hour based on the given speed.
Average speed and how it is calculated by considering the total distance and total time traveled.
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rehardens the newly arranged disulfide bonds as well as neutralizes any remaining waving lotion in the hair through oxidation is called
Answers
Rehardens the newly arranged disulfide bonds as well as neutralizes any remaining waving lotion in the hair through oxidation is called a neutralizer.
Waving Lotion / Solution is the one that softens and swells the cuticle layer then it breaks the disulfide bonds through the process of reduction.
Neutralizer is the substance that rehardens the newly arranged disulfide bonds as well as neutralizes any remaining waving lotion in the hair through oxidation.
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