red is kinda sus today
Answers
Answer:
he do be lookin sus
Explanation:
Answer:
yeah
Explanation:
d
Related Questions
the ph of an aqueous solution of 0.287 m ammonium iodide, nh4i (aq), is . this solution is
Answers
The dissociation of\(NH_4^+\)and\(I^-\) ions in water determines the pH of an aqueous solution of 0.287 M ammonium iodide, \(NH_4I (aq)\).
The pH of an aqueous solution of 0.287 M ammonium iodide,\(NH_4I\) (aq), is dependent on the dissociation of \(NH_4^+\) and I- ions in water. The ammonium ion\((NH_4^+)\) is a weak acid that can donate a proton \((H^+)\) to water, forming the hydronium ion \((H_3O^+)\), while the iodide ion \((I^-)\) is a weak base that can accept a proton\((H^+)\) from water, forming the hydroxide ion \((OH^-)\). Therefore, the pH of this solution is slightly acidic due to the presence of \(NH_4^+\) ions that partially dissociate in water, releasing H+ ions. The pH value can be calculated using the acid dissociation constant (Ka) for \(NH_4^+\) in water, which is \(5.6 x 10^-^1^0\). Using the formula \(pH = -log[H^+],\) we can calculate the pH of the solution to be approximately 5.49.
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describe the relationship between the substrate and the product
Answers
A simple chemical reaction with a single substrate shows a linear relationship between the rate of formation of product and the concentration of substrate, as shown below: ... The relationship between rate of reaction and concentration of substrate depends on the affinity of the enzyme for its substrate.
x=2 and y=3
find the value of
3x + y
3x² - 4
solve this please ty
Answers
Answer:
3x+y = 9
3x² - 4 = 8
Explanation:
3x+y
3(2)+3
9
3x2-4
3(2)^2-4
3
It is defined as the number of particles per mole of a substance. *
a. Molar ratio
b. Mole
c. Avogrado's number
Answers
Answer:
Avogadro's number
Explanation:
Avogadro's number
defined as the number of elementary particles (molecules, atoms, compounds, etc.) per mole of a substance. It is equal to 6.022×1023 mol-1 and is expressed as the symbol NA.
Q-3 Determine the fugacity in atm for pure ethane at 310 K and 20.4 atm and change in the chemical potential between this state and a second state od ethane where temperature is constant but pressure is 24 atm.
Answers
The fugacity in atm for pure ethane at 310 K and 20.4 atm is given by the equation: f = 20.4 exp (-Δg1/RT). The change in chemical potential between this state and a second state of ethane where the temperature is constant but the pressure is 24 atm is -0.0911RT.
Fugacity is a measure of the escaping tendency of a component in a mixture, which is defined as the pressure that the component would have if it obeyed ideal gas laws. It is used as a correction factor in the calculation of equilibrium constants and thermodynamic properties such as chemical potential. Here we need to determine the fugacity in atm for pure ethane at 310 K and 20.4 atm and the change in the chemical potential between this state and a second state of ethane where the temperature is constant but the pressure is 24 atm. So, using the formula of fugacity: f = P.exp(Δu/RT) Where P is the pressure of the system, R is the gas constant, T is the temperature of the system, Δu is the change in chemical potential of the system. Δu = RT ln (f / P)The chemical potential at the initial state can be calculated using the ideal gas equation as: PV = nRT
=> P
= nRT/V
=> 20.4 atm
= nRT/V
=> n/V
= 20.4/RT The chemical potential of the system at the initial state is:
Δu1 = RT ln (f/P)
= RT ln (f/20.4) Also, we know that for a pure substance,
Δu = Δg. So,
Δg1 = Δu1 The change in pressure is 24 atm – 20.4 atm
= 3.6 atm At the second state, the pressure is 24 atm.
Using the ideal gas equation, n/V = 24/RT The chemical potential of the system at the second state is: Δu2 = RT ln (f/24) = RT ln (f/24) The change in chemical potential is Δu2 – Δu1 The change in chemical potential is
Δu2 – Δu1 = RT ln (f/24) – RT ln (f/20.4)
= RT ln [(f/24)/(f/20.4)]
= RT ln (20.4/24)
= - 0.0911 RT Therefore, the fugacity in atm for pure ethane at 310 K and 20.4 atm is:
f = P.exp(Δu/RT)
=> f
= 20.4 exp (-Δu1/RT)
=> f
= 20.4 exp (-Δg1/RT) And, the change in the chemical potential between this state and a second state of ethane where the temperature is constant but pressure is 24 atm is -0.0911RT. Therefore, the fugacity in atm for pure ethane at 310 K and 20.4 atm is given by the equation: f = 20.4 exp (-Δg1/RT). The change in chemical potential between this state and a second state of ethane where the temperature is constant but the pressure is 24 atm is -0.0911RT.
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While burning coal and charcoal, you notice that coal releases more heat than charcoal. That means that the... 1. elastic energy 2.gravitational energy 3.chemical potential energy is 1.lower 2. higher in charcoal than in coal
Answers
Answer:
3). Chemical potential energy
1). lower in charcoal than in coal.
Explanation:
Chemical potential energy is defined as the energy that can be absorbed or stored in a substance's chemical bonds. It can be released when there is a change in the number of particles of the substance.
As per the question, coal releases more heat than charcoal because 'the chemical potential energy of charcoal is lower than the coal' and hence, the latter would release more heat on burning i.e. the energy that was absorbed in the chemical bonds of the substance. Hence, option 3 and 1 are the correct answers.
what is a food chain OR web, and what is it useful for?
Answers
Answer:
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Food webs can be used to study bottom-up or top-down control of community structure.
Explanation:
Food chains are important because they show the intricate relationships in ecosystems. They can reveal how each organism depends on someone else for survival. Food chains also display what happens when a problem occurs and a producer or consumer is lost.
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You place 35 ml of gas in a medical syringe at atmospheric pressure, 14.7 psi. What would the pressure in the syringe read if you pushed in the plunger to a volume of 2 ml? Round off to the nearest tenth,
Answers
The pressure in the syringe would read 257.3 psi if the volume is reduced to 2 ml.
What is Boyle's Law?Boyle's Law is a gas law that describes the relationship between the pressure and volume of a gas at a constant temperature. It states that the pressure and volume of a gas are inversely proportional.
How can we say that gas is an ideal gas?An ideal gas is a theoretical gas that conforms to the kinetic theory of gases. We can say that gas is ideal when it has low pressure, High temperature, and gas particles should not react with each other or the walls of the container.
We can use Boyle's Law,
P₁V₁ = P₂V₂
We can plug in the values given:
P₁ = 14.7 psi
V₁ = 35 ml
V₂ = 2 ml
Solving for P₂, we get:
P₂ = (P₁ x V₁) / V₂
P₂ = (14.7 psi x 35 ml) / 2 ml
P₂ = 257.25 psi
Therefore, the pressure in the syringe would read 257.3 psi if the volume is reduced to 2 ml.
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Which condition can cause excessive pressure on the high side of a self contained active recovery device
Answers
Answer:
What can cause excessive pressure on the high side of an active self-contained recovery device? A closed recovery tank inlet valve or excessive air or other non condensables in the recovery tank (either A or B) Portable refillable tanks or containers used to ship recovered refrigerants must meet what standard(s)?
Explanation:
please mark me as brainliest thank you
The isotopes of Madeupium (Ma) and their abundance in nature are shown below. Which is the most likely estimate of what the atomic mass is close to?
Ma-74 (74.333 - 85%)
Ma-75 (74.999 - 10%)
Ma-76 (75.700 - 5%)
A. 74 g
B. 75 g
C. 76 g
Answers
Answer:
A = 74 g
Explanation:
Given data:
Ma-74 (74.333 - 85%)
Ma-75 (74.999 - 10%)
Ma-76 (75.700 - 5%)
Atomic mass close to = ?
Solution:
1st of all we will calculate the average atomic mass.
Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) + (abundance of 3rd isotope × its atomic mass) / 100
Average atomic mass = (85×74.333)+(10×74.999)+(5×75.700) /100
Average atomic mass = 6318.305 +749.99+ 378.5 / 100
Average atomic mass= 7446.795/ 100
Average atomic mass = 74.467 amu
The average atomic mass is closer to the 74 g.
Carnegie Development stages
Answers
Answer:
Stage 1: 1 days.
Stage 2: 2-3 days.
Stage 3: 4-5 days.
Stage 4: 6 days.
Stage 5 (a-c): 7-12 days.
Stage 6: c. 17 days.
Stage 7: c. 19 days.
Stage 8: c. 23 days.
A compound is formed by combining a polyatomic cation and a polyatomic anion. If the valency of the constituent elements, present in cation is three and one, then which of the following statement(s) is/are correct?
One/More Correct Answer(s)
A.
The compound can be ammonium sulphate
B. The molecular mass of the carbonate of this polyatomic cation can be 96 u
C. The metal present in the compound can be aluminium
D. Chemical formula of the compound can be (N*H_{4}) 2 SO 4
Answers
A compound is formed by combining a polyatomic cation and a polyatomic anion. The compound can be ammonium sulphate and the chemical formula for the compound is (NH₄)₂SO₄.
The ammonium ion is a polyatomic cation - NH₄⁺ and the polyatomic anion that is sulfate ion - SO₄²⁻. The polyatomic cation and the polyatomic anion combine and for the polyatomic ionic com pounds. Ionic bond is formed between a positively charge ion and the negatively charge ion.
Thus, A compound is formed by combining a polyatomic cation and a polyatomic anion. The compound can be ammonium sulphate and the chemical formula for the compound is (NH₄)₂SO₄.
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True or false. As a wave travels through a given material its velocity changes.
Answers
Answer:
true
Explanation:
Answer:
false
Explanation:
i took the test and got it right
There are ________ mol of carbon atoms in 4 mol of C4H8O2
Answers
There are 16 mol of carbon atoms in 4 mol of C4H8O2
The chemical formula C4H8O2 tells us that each molecule of this compound contains 4 carbon atoms, 8 hydrogen atoms, and 2 oxygen atoms. Therefore, to determine the number of carbon atoms in 4 mol of C4H8O2, we need to multiply the number of moles by the number of carbon atoms per molecule:
Number of carbon atoms = number of moles × number of carbon atoms per molecule
Number of carbon atoms = 4 mol × 4 carbon atoms per molecule
Number of carbon atoms = 16 mol
So there are 16 mol of carbon atoms in 4 mol of C4H8O2. It's important to note that the chemical formula of a compound gives us information about the ratio of atoms in the compound, which allows us to determine the number of atoms in a given amount of the compound.
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The mass of sample x is 20.0g it was placed in a graduated cylinder and the water level to from a to b. What is the density of the sample x?
Answers
Answer:
.
Explanation:
The density of the sample x which is the ratio of the mass of the sample and the volume of water in the cylinder displaced is 4 g/cm³
Recall ::
Density = Mass ÷ Volume Mass of sample x = 20 g Volume of water in the cylinder displaced = (b - a) = (20 - 15) = 5 cm³The density of sample x = (20g ÷ 5cm³) = 4g/cm³Therefore, the density of the sample x is 4g/cm³
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A 20 N net force acts on an object with a mass of 2.0 kg. What is the object's acceleration? (PLS HELP lol)
Answers
Explanation:
Force = Mass × Acceleration
20 = 2.0 × A
A = 20/2 = 10m/s^2
why is time an independent variable
Answers
Pls help with chemistry
Answers
The answer is D.
Activated complex
How many particles of CuCr2O7 are present in a 64.5 gram sample?
Answers
1.39 × 10²³ particles CuCr₂O₇
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableMolesAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[Given] 64.5 g CuCr₂O₇
[Solve] particles CuCr₂O₇
Step 2: Identify Conversions
Avogadro's Number
[PT] Molar Mass of Cu - 63.55 g/mol
[PT] Molar Mass of Cr - 52.00 g/mol
[PT] Molar Mass of O - 16.00 g/mol
Molar Mass of CuCr₂O₇ - 63.55 + 2(52.00) + 7(16.00) = 279.55 g/mol
Step 3: Convert
[DA] Set up: \(\displaystyle 64.5 \ g \ CuCr_2O_7(\frac{1 \ mol \ CuCr_2O_7}{279.55 \ g \ CuCr_2O_7})(\frac{6.022 \cdot 10^{23} \ particles \ CuCr_2O_7}{1 \ mol \ CuCr_2O_7})\)[DA] Divide/Multiply [Cancel out units]: \(\displaystyle 1.38944 \cdot 10^{23} \ particles \ CuCr_2O_7\)Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
1.38944 × 10²³ particles CuCr₂O₇ ≈ 1.39 × 10²³ particles CuCr₂O₇
Bonding Story Mini Project
You can choose to show ionic bonding, covalent bonding (polar or nonpolar), or both, but your story must do the following:
1. Explain the type or types of bonding you are showing - this does not need to be explicit, but it needs to be somehow worked into the story.
2. Show at least 2 different bonds forming (e.g. 2 different compounds)
3. Show the valence electrons of the atoms and how they meet the octet rule
Answers
How many moles of carbon dioxide (CO2) is produced when 76.9 g of oxygen (O2) is consumed when butane is burned? The balanced equation is 2 C4H10 + 13 O2 → 8 CO2 + 10 H2O. Show all of your work for full credit.
Answers
2 C4H10 + 13 O2 → 8 CO2 + 10 H2O.
The concentration of which ion is increased when LIOH is dissolved in water
Answers
Answer:OH^- ion
Explanation: When LiOH added in water then LiOH dissociated in Li+ and OH- . Water is a composition of H+ and OH- ions hence concentration of OH- ions will be increased after adding LiOH.
A sample of river wayer contains 125mg per dm^3 of dissolved soilds. Calculate the mass of dissolved soilds in grams in 250 cm^3 of this sample of river water. Giver your answer to 2 significant figures (4 marks)
I will give brainilist to anyone who answers
Answers
Answer is in g convert mg into g = 125/1000= 0.125g
This means there is 0.125g of solids in 0.25dm3
Need to know how much is in 1dm3
0.25dm3 is 1/4 of 1dm3
0.125/4 = 0.03125
0.031g (2S.F)
The mass of a substance is the product of its density and volume. Thus, the mass of the dissolved solids with a density of 125 mg/dm³ with a volume of 250 cm³ is 31.25 mg.
What is density?Density of a substance is the measure of its mass per unit volume. Thus it describes how much denser the substance is in a given volume. Mathematically it is the ratio of mass to the volume.
Density of a substance depends on the mass, volume, bond type, temperature and pressure. The ratio of density of a substance with the density of water is called its specific gravity.
It is given that the density of the dissolved solids is 125 mg/dm³ and the volume is 250 cm³ or 0.25 dm³. Thus the mass can be calculated as follows:
density = mass/volume
mass = density × volume
= 0.25 dm³ × 125 mg/dm³
= 31.25 mg
Hence, the mass of the dissolved solids in the river wayer is 31.25 M=mg.
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A pupil has drawn the electronic structure of fluorine and the diagram is shown below. However,
mistakes have been made. State three mistakes that have been made.
Answers
The first shell can only hold 2 electrons, but the pupil placed in 8 electrons.
The second shell can hold up to 8 electrons, but the pupil only placed in 2 electrons.
Flourine only has 9 total electrons, yet there are 10 electrons in the diagram.
Answer:
Explanation:
In the Fluorine atom there are 2 electrons in the innermost shell and 7 i the outer shell.
calculate the average molar bond enthalpy of the carbon-chlorine bond in a ccl4 molecule
Answers
The average molar bond enthalpy of the carbon-chlorine (C-Cl) bond in a \(CCl_4\) molecule can be calculated by comparing the bond dissociation energies of multiple C-Cl bonds in different compounds and taking the average.
Here are the approximate bond dissociation energies for the C-Cl bond in a few compounds:
\(CH_3Cl\): 339 kJ/mol
\(CH_2C_l2\): 328 kJ/mol\(CHCl_3\): 323 kJ/mol\(CCl_4\): 330 kJ/molTo calculate the average, add up the bond dissociation energies and divide by the number of data points:
(339 + 328 + 323 + 330) kJ/mol = 1320 kJ/mol
Average molar bond enthalpy of C-Cl bond in \(CCl_4\)= 1320 kJ/mol
Please note that these values are approximate and can vary depending on the specific experimental conditions and compounds used.
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which classification test is used to tell apart (differentiate) an aldehyde from a ketone? bromine test bicarbonate test chromic acid test acetyl chloride test 2,4-dinitrophenylhydrazine (dnph) test
Answers
The classification test used to differentiate an aldehyde from a ketone is the 2,4-dinitrophenylhydrazine (DNPH) test. The correct option is C.
The DNPH test is a common and reliable method for distinguishing between aldehydes and ketones. The test involves mixing a sample of the unknown compound with a solution of DNPH in acid. If the compound is an aldehyde, it will react with the DNPH to form an orange-red precipitate.
Ketones do not react with DNPH under these conditions. The DNPH test is widely used in both qualitative and quantitative analysis of organic compounds. It is a simple and effective method for identifying the presence of an aldehyde functional group in a compound. Therefore, the correct option is C.
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11) A sample of gas has a volume of 823.7 mL and a pressure of 351.8 torr. What volume (in mL) will the gas occupy at 752.9 torr if the temperature of the gas doesn't change? Keep the answer with one decimal place
Answers
Answer:
384.9 mL.
Explanation:
What is given?
Volume 1 (V1) = 823.7 mL.
Pressure 1 (P1) = 351.8 torr.
Pressure 2 (P2) = 752.9 torr.
What do we need? Volume 2 (V2).
Step-by-step solution:
This is a Boyle's Law problem. Boyle's law states that the volume of a given mass of gas varies inversely with the pressure when the temperature is kept constant. An inverse relationship is described in this way. As one variable increases in value, the other variable decreases.
The formula of the law is:
\(P_1V_1=P_2V_2.\)Where P is pressure and V is volume. We want to find volume 2, 'V2'. So let's solve for 'V2' and replace the given data that we have in the new formula:
\(V_2=\frac{P_1V_1}{P_2}=\frac{351.8\text{ torr}\cdot823.7\text{ mL}}{752.9\text{ torr}}=384.882\text{ mL}\approx384.9\text{ mL.}\)The new volumewill be 3384.9 mL You can note as the pressure is increasing, the volume is decreasing.
In chemistry experiment it is determined that 4.2 moles of aluminum oxide are needed to completely react with a sample of sodium. How many molecules of aluminum oxide are there in 4.2 moles? After an experiment, 35.6 g of carbon were recovered. How many moles of carbon is this?
Answers
Answer:
Aluminium Oxide = 2.5×10²³ molecules
Carbon = 2.96 moles
Explanation:
1 mole of aluminium oxide contains 6.02× 10²³ molecules, hence 4.2 moles will contain 4.2 ×6.02×10²³ molecules
for carbon, number of moles = Mass/ Molar Mass = 35.6/12.01 = 2.96 mole
Butane (C4H10) undergoes combustion.
Balanced Equation: ___ C4H10(l) + ___ O2(g) → ____ CO2(g) + _____ H2O(l)
Answers
Answer:
2C4H10 + 13O2 → 8CO2 + 10H2O
Explanation:
These coefficients satisfy the law of conservation of mass, meaning there are the same number and type of each atom on both sides of the reaction.
How many grams of water will be needed to saturate 25 grams of KCI at 40 celsius?
Answers
We are going to need about 62.5 g of water so as to saturate the KCl solution.
What is solubility?The term "solubility" describes a material's capacity to dissolve in another substance -- referred to as the "solvent" -- to create a homogenous combination known as a solution. It is a characteristic that establishes how much a solute may dissolve in a specific solvent under specific pressure and temperature conditions.
We know that;
40 g of KCl would dissolve in 100 g of water
25 g of KCl would dissolve in; 25 * 100/40
= 62.5 g of water
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