I need help urgently see where it says text here answers the questions PLS I NEED AN 100%

Answer:

A measurement is the action of measuring something, or some amount of stuff. So it is important to measure certain things right, distance, time, and accuracy are all great things to measure. Measurements can also allow us to make desicions based on the outcome of the measurement

Answer: Yes, sulfuric acid is highly soluble in water.

Explanation:

The enthalpy of the process could be obtained as -14.22 kJ/mol.

We have to find the number of moles of the calcium chloride from;

1. 00 M * 25/1000L = 0.025 moles

Number of moles of the calcium fluoride = 2.00 M * 25/1000 L = 0.05 moles

Given that 1 mole of  calcium chloride reacts with 2 moles of  calcium fluoride

0.025 moles of calcium chloride reacts with 2 moles  *  0.025 moles/1 mole

= 0.05 moles

Hence, calcium chloride is the limiting reactant.

The total mass of the solution = 25 ml + 25 ml  = 50 ml

Mass of the solution = 50 g

The heat lost = -( 50 g * 4. 184 j/°c•g * (26. 7°c * 25. 0°c)) * 10^-3/0.025 moles

= -14.22 kJ/mol

Learn more about enthalpy:https://brainly.com/question/13996238

#SPJ1

Answer:

theres no picture

Explanation:

Answer: pure iron is softer than steel because the atoms can slip over one another.

Explanation:

ionic bonds form between metals which form positively charged ions and nonmetals which form negatively charged ions.

The dominant Intermolecular Force (IMF) in the molecule CH₃CHCHCOOH is a carboxyl group (-COOH) hydrogen bond.

CH3CHCHCOOH is the chemical formula for 3-hexenoic acid. In this molecule, there is a carboxyl group (-COOH) which is a functional group that contains a carbon atom double-bonded to an oxygen atom and  single-bonded to a hydroxyl group (-OH).

The carboxyl group can participate in hydrogen bonding, which is a type of attractive interaction between a partially positive hydrogen atom in one molecule and a partially negative atom, such as oxygen or nitrogen, in another molecule. These hydrogen bonds are relatively strong and are responsible for many of the properties of carboxylic acids, such as their characteristic sour taste. The carboxyl group in 3-hexenoic acid is the dominant Intermolecular Force in this molecule.

To learn more about Intermolecular Force visit: https://brainly.com/question/2193457

#SPJ4

Answer:

AgNO3 - Silver nitrate

CaCl2 - Calcium chloride

Al2S3, aluminum sulfide

Explanation:

THESE ARE NOT LINKS TO OTHER WEBSITES!!!! THESE ARE METALLIC COMPOUND FORMULAS!!!!

(My other answer was deleted because they thought i was posting websites but i was posting formulas for your question)

Algae blooms are most often caused by eutrophication.

Algae blooms are are dense layers of tiny green plants that occur on the surface of lakes and other bodies of water when there is an overabundance of nutrients (primarily phosphorus) on which algae depend.

Algae species tend to proliferate in growth (bloom) in the presence of abundance nutrients. This abundance of nutrients is as a result of a process called eutrophication.

Eutrophication is the ecosystem's response to the addition of artificial or natural nutrients, mainly phosphates, through detergents, fertilizers, or sewage, to an aquatic system.

Learn more about eutrophication at: https://brainly.com/question/13232104

#SPJ1

Answer:

Explanation:

The percentage error of a certain measurement can be found by using the formula

\(P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ \)

From the question

actual density = 7.80 g/cm³

error = 7.30 - 7.80 = 0.5

We have

\(p(\%) = \frac{0.5}{7.8} \times 100 \\ = 6.410256...\)

We have the final answer as

Hope this helps you

option A is the correct one

It represents Mp orBp of a substance at a specific pressure

Answer:

All elements are neutral

Explanation:

The plum pudding model of the atom indicated that all elements are neutral. The model was proposed by J.J Thomson after he conducted his experiment on the gas discharge tube.

From the experiment he discovered electrons which he called cathode rays.

Therefore, he suggested the plum pudding model of the atom.

The model describes negatively charge sphere surrounded by positive charges to balance them.

Answer:

\(V=6.2L\)

Explanation:

Hello there!

In this case, according to the given information, it is possible for us to realize that we need to use the ideal gas equation in order to calculate the volume of CO2 but firstly calculating the moles:

\(n=\frac{12.5g}{44.01g/mol}=0.284mol\)

Then, we proceed with the ideal gas equation to solve for volume:

\(PV=nRT=\\\\V=\frac{nRT}{P}\\\\V=\frac{0.284mol*0.08206\frac{atm*L}{mol*K}*(45+273.15)K}{1.20atm}\\\\V=6.2L\)

Regards!

Therefore, the correct options for 1, 2 and 3 are B, A and D respectively.

The ether which reacts with \(CH_3\), MgBr forms diethyl ether \((CH_3CH_2OCH_2CH_3)\). To form alkyl magnesium compounds, it reacts with \(CH_3\), MgBr. In organic chemistry, diethyl ether is often employed as a solvent and has a wide range of uses.

The aromatic chemical benzene \((C_6H_6)\) is distinguished by a ring of six carbon atoms with alternating double bonds. It serves as an important component in the synthesis of organic compounds due to its high stability and unique chemical characteristics.

The optimal reagent for the reaction \(CH_3CH_2CH_2CH_2OHCH_3CH_2CH_2CH_2Cl\) is \(SOCl_2\) (thionyl chloride). \(SOCl_2\) is often employed in an \(Sn_2\) substitution process to convert an alcohol to an alkyl chloride. An alkyl chloride is formed as a result of reaction with the hydroxyl group of an alcohol.

Therefore, the correct options for 1, 2 and 3 are B, A and D respectively.

Learn more about organic compounds, here:

https://brainly.com/question/13508986

#SPJ4

Your question is incomplete, most probably the complete question is:

1. Which of the following ethers reacts with CH3​MgBr?

a. CH3OCH3 (dimethyl ether)

b. CH3CH2OCH2CH3 (diethyl ether)

c. CH3CH2OCH3 (ethyl methyl ether)

d. CH3OCH2CH3 (methyl ethyl ether)

2. Which of the following is an aromatic compound?

a. Benzene (C6H6)

b. Ethanol (C2H5OH)

c. Acetic acid (CH3COOH)

d. Methanol (CH3OH)

3. For the following transformation the best reagent is: CH3​CH2​CH2​CH2​OH⋯CH3​CH2​CH2​CH2​Cl

a. NaCl

b. Cl2​

c. HCl

d. SOCl2​

795 milliliters of 0.634 M NaOH solution are required to precipitate all of the Cr³⁺ ions in 159 ml of 0.531 M Cr₂(SO₄)₃ solution.

To calculate the number of milliliters of 0.634 M NaOH required to precipitate all of the Cr³⁺ ions in 159 ml of 0.531 M Cr₂(SO₄)₃ solution, we need to determine the stoichiometry of the reaction between Cr³⁺ ions and OH⁻ ions.

From the chemical equation, we know that one mole of Cr₂(SO₄)₃ produces two moles of Cr³⁺ ions. Therefore, the number of moles of Cr³⁺ ions in the 159 ml of 0.531 M Cr₂(SO₄)₃ solution can be calculated as follows:

Moles of Cr³⁺ ions = volume (L) × concentration (M) × stoichiometry

                   = 0.159 L × 0.531 mol/L × 2

                   = 0.168 mol

Since the reaction between Cr³⁺ ions and OH⁻ ions occurs in a 1:3 ratio, we need three times the number of moles of OH⁻ ions to precipitate all of the Cr³⁺ ions. Thus, the moles of NaOH required can be calculated as follows:

Moles of NaOH = 3 × moles of Cr³⁺ ions

             = 3 × 0.168 mol

             = 0.504 mol

Finally, we can calculate the volume of 0.634 M NaOH solution needed using the equation:

Volume of NaOH solution (L) = moles of NaOH / concentration of NaOH

                           = 0.504 mol / 0.634 mol/L

                           = 0.795 L

Volume of NaOH solution (mL) = 0.795 L × 1000

                           = 795 mL

Learn more about stoichiometry here:  

https://brainly.com/question/28780091

#SPJ11

Answer:

Titanium oxide sulphate

Explanation:

It takes approximately 155 seconds to decrease 2.00 M PH₃ to 0.350 M.

Initial concentration = 2.00 M

Final concentration = 0.350 M

Time taken to decrease from 1.00 M to 0.250 M = 120 seconds

We have to find the time required for 2.00 M to decrease to 0.350 M.For the reaction:PH₃ → P + 3H₂Rate = -d[PH₃]/dt = k[PH₃]

First-order reaction can be written ask = (2.303/t)(log C₀/Ct)k

= (2.303/t)(log C₀/Ct) ...(1)

where,C₀ = Initial concentration of reactant

Ct = Concentration of reactant at time t

Substitute the given values in equation (1).k₁ = (2.303/120)(log 1.00/0.250) = 0.005779k₂ = (2.303/t)(log 2.00/0.350)

We know that half-life, t₁/₂ = (0.693/k)

So, the time required to decrease the concentration of PH₃ from 2.00 M to 1.00 M is given by,t₁/₂ = (0.693/k₂)0.5t₂ = t₁/₂(log C₀/Ct)

Substitute the known values in the above equation.t₂ = (0.5 × 70.95)(log 2.00/0.350)≈ 155 seconds

To know more about First-order reaction click on below link:

https://brainly.com/question/31661139#

#SPJ11

Answer:scientists finished deciding the human genome in 2001. This research helped genetics analyze and islote sections of DNA for investigation. Without this information and the technology invented during the Human Genome Project, Hugh would not have been able to extract portions of his daughters DNA. Also, he wouldn’t have been able to see the genes that did not function properly in his daughters DNA.

Explanation: this is a right answer for PLATO.

The movement of chloride ions into the red blood cells (RBCs) in exchange for bicarbonate ions is known as the chloride shift or Hamburger phenomenon.

This occurs in the lungs and helps to regulate the pH of the blood. During gas exchange, oxygen diffuses into the bloodstream and carbon dioxide diffuses out of the bloodstream.

This increase in oxygen levels and decrease in carbon dioxide levels leads to a decrease in the production of bicarbonate ions in RBCs and an increase in the production of chloride ions.

The chloride ions then move into the RBCs to maintain electroneutrality, while bicarbonate ions move out of the RBCs into the plasma.

In tissues, the opposite process occurs, with bicarbonate ions moving into the RBCs and chloride ions moving out of the RBCs, helping to maintain pH homeostasis in the body.

To know more about electroneutrality refer here

https://brainly.com/question/52501697#

#SPJ11

For the 1,3-cyclohexanes, the most stable conformation of the cis isomer has both methyl groups in equatorial positions. As you know, the geometry of sp³ hybridized carbon is tetrahedral. With cyclohexane, the whole molecule is not as flat as I often sketch in my notebook. Therefore, cyclohexane adopts two conformations. Boat form and chair form. The boat structure is less frequently seen due to its slightly greater steric hindrance, while the chair structure is preferred as it is very stable.

The figure below shows the chair conformation of cis-1 3-dimethylcyclohexane. Also, cis-1,3-dimethylcyclohexane exists in two chair forms. This is because the conformation continuously changes shape and is also called a compound in a dynamic state. The conformation is also temperature dependent. Therefore, cyclohexane shows different peaks in H NMR at low temperature and room temperature.

A closer look at cyclohexane reveals that the 12 substituents are not the same. However, six substituents occupy axial positions and the remaining six occupy equatorial positions.

The figure below shows the dynamic equilibrium conformation of cis-1 3-dimethylcyclohexane.

learn more about conformation here : https://brainly.com/question/15213601

#SPJ4

Answer:

"successful circus performers start training when they are children"

Explanation:

this explains it well because most skills start at a young age.

Answer: Successful circus performers start training when they are  children.

Explanation:

The total entropy change of the steam during this process is 24.885 kJ/K.

During this process, the system undergoes a phase change from a saturated liquid-vapor mixture to a saturated vapor. The initial state can be determined using a steam table, which shows that at 225 kPa, the saturation temperature of water is 120.23°C. Therefore, the initial state is a mixture of liquid water and steam at 120.23°C with 80% of the mass in the liquid phase.

When the electric resistance heater vaporizes all of the liquid, the system transitions to a state of saturated vapor at the same pressure of 225 kPa and temperature of 120.23°C. The total entropy change of the steam during this process can be calculated using the formula:

ΔS = m * s_final - m * s_initial

where ΔS is the total entropy change, m is the mass of the steam, s_final is the specific entropy of the final state, and s_initial is the specific entropy of the initial state.

At the initial state, using the steam table, the specific entropy of the saturated liquid-vapor mixture can be found to be 1.5875 kJ/kg-K. At the final state, the specific entropy of the saturated vapor can also be found to be 7.2925 kJ/kg-K.

Therefore, the total entropy change of the steam is:

ΔS = 4.2 kg * (7.2925 kJ/kg-K - 1.5875 kJ/kg-K)
ΔS = 24.885 kJ/K

Therefore, the total entropy change of the steam during this process is 24.885 kJ/K.

Know more about Total entropy change here:

https://brainly.com/question/30691597

#SPJ11

Answer: I remember looking out of the car as we pulled up to the Frantz school.”

“I thought maybe it was Mardi Gras.”

“As we walked through the crowd, I didn’t see any faces.”

“[The school] looked bigger and nicer than my old school.”

“The crowd behind us made me think this was an important place.”

“It must be college, I thought to myself.

Explanation:

“I thought maybe it was Mardi Gras.”

“[The school] looked bigger and nicer than my old school.”

“It must be college, I thought to myself.”

The maximum values of the electric and magnetic fields is 3.42*\(10^{-6}\) T.

Electric fields arise from the electric charges and changing magnetic fields.

An electric charge, or collection of the charges, will have an associated electric field. Any charged object placed in this field will experience an electrostatic force as field interacts with the charge of the object. Field lines represent force a positively charged particle would experience if it were in the field at that point.

A changing magnetic field can also cause the electric charges to move. This phenomenon is commonly used in the electric generators to induce electric currents in wires. The induced current can be increased by causing the larger changes in the magnetic field or by coiling the wire so that more wire is affected by the changing magnetic field.

Magnetic fields arise from the permanent magnets and electric charges in motion.

Magnets can occur naturally (such as the Earth’s magnetic field), or they can be made by magnetizing the ferromagnetic materials.

Intensity I = 1.4*\(10^{3}\) w/\(m^{2}\)

Total Energy density  \(U_{avg}\) = \(\frac{1}{2} E_{o}E_{o} ^{2}\)

a) energy density = I/C

  Therefore,  1/2 \(E_{o}E_{o}^{2}\) = I/C

     1/2 * 8.85 * \(10^{-12}\) * \(E_{o}^{2}\) = 1400/(3*\(10^{8}\))

\(E_{o} ^{2}\) = 105.46*\(10^{4}\)

\(E_{o}\) = 10.27*\(10^{2}\) N/C

\(B_{o}\) = \(\frac{E_{o} }{C}\) = (10.27*\(10^{2}\))/ (3*\(10^{8}\)) = 3.42*\(10^{-6}\) T

To know more magnetic field visit: https://brainly.com/question/14848188

#SPJ4

Answer:

jolly ranchers

Explanation: yes

Answer:

D. Thermal conduction is blocked by the flip-flops.

Explanation:

Convection is a process of heat transfer which involves fluids( liquid or gas). This however rules convection out of the answer.

Radiation involves heat transfer from the sun to bodies on earth.

Conduction involves heat transfer between two solid bodies. Hot beach sand and flip-flops are solid bodies which validates thermal(heat) conduction.

The electron-pair geometry for As in AsO2- is trigonal planar.

To determine the electron-pair geometry, we need to look at the number of electron groups around the central atom, As. In this case, there are three electron groups: two oxygen atoms and one lone pair. Since there are three electron groups, the electron-pair geometry is trigonal planar.

The molecular geometry, which describes the shape of the molecule, is also important to consider. In this case, the molecular geometry is bent or angular, since the lone pair on the As atom pushes the oxygen atoms closer together. In summary, the electron-pair geometry for As in AsO2- is trigonal planar, while the molecular geometry is bent or angular.

Learn more about atom at:

https://brainly.com/question/20214648

#SPJ11

To prepare the buffer, you'll need 100 mL of stock solution containing 1 M KH2PO4. This is because the buffer's pKa is close to the target pH and the buffer requires a 1:1 ratio of KH2PO4 and K2HPO4 to obtain a pH of 7.6.

According to the Henderson-Hasselbalch equation, [KH2PO4]/[K2HPO4] must be equal to (pKa + pH)/pKa = 1.36 in order to create a buffer with a pH of 7.6. Given that both of the stock solutions are 1.00 M, the quantity of KH2PO4 required can be determined as follows: Let x represent the required quantity of KH2PO4 in millilitres.

(1000 mL/L) * (x/1000 mL) / (1.50 L/L) = 1.36 x = 100 mL * (1.00 mol/L) *

As a result, the buffer requires 100 mL of 1.00 M KH2PO4 stock solution. With distilled water and the K2HPO4 stock solution, the remaining volume can be filled.

learn more about solution here:

https://brainly.com/question/30665317

#SPJ4