write a net ionic equation for the reaction that occurs when aqueous solutions of barium hydroxide and hydrofluoric acid are combined.

A spontaneous reaction is one in which the change in free energy is negative and the standard cell potential is positive.

For a redox reaction to be spontaneous, the electrode potential of the cell must be positive and this depends on the relative electrode potentials of the species involved in the reaction. A metal can not displace a metal above it in the electrochemical series from solution.

Based on this;

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Answer:

A is the symbol of mass number.

Explanation:

→ Mass number (A) = Protons + Neutrons

It is the required formula. The symbol of the mass number is A.

Answer:

The letter A

Explanation:

Answer:

Protons are the atomic number and for each element they never change.

Electrons are equal to the atomic number unless it is an Ion (Positive charge means it has less negative means it has more)

Mass number is Protons+Nuetrons

Explanation:

Lauren needs the information like mass of each substance respect to its volume in order to estimate the density of each liquid that creates the layers of colors.

Lauren can calculate density by the formula

Density = Mass/ Volume

According to the densities, the liquid that has a density less than that of water, it will float in water.

Whereas the objects or liquids that have a density more than that of water, it will sink to the very bottom.

A liquid’s density is a gauge of how heavy it is relative to the amount being measured. The liquid that weighs heavier is denser if you weigh two liquids with similar volumes or amounts.

A substance that is less dense than water will float if it is gently introduced to the water’s surface. Like a solid, a liquid’s density is determined by dividing its mass by its volume, or D = m/v. Water has an average density of one gram per cubic centimeter.

Liquids have particles that are closely spaced. Liquids have high densities because, although being randomly arranged, they are tightly packed.

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The table is based on the periodic table and is to be filled by finding out various elements of periodic table

Disclaimer:

The table given below is not clear and hence only general idea can be provided

The table is based on the idea of periodic table where various constituents such as mass number, overall charge , total particles, number of protons have been asked to be labelled.

Sodium has been solved as an example and various postulates of Cu is being provided to solve accordingly

In the constituents of element Cu

Name- Cuprous and Cupric

Atomic number-29

Mass number-63

overall charge-+2 for Cuprous and +3 for Cupric

Total particles in nucleus-63

number of protons -29

number of neutrons-34

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Answer:

If you follow the periodic table and its orbitals, you'll see that the element that has the electron configuration of 1s²2s²2p³ is Nitrogen. It's period, group, and atomic number are 2, 15, and 7 respectively. The other 2 are Neon, who's period, group, and atomic number are 2, 18, and 10 and the last one is Fluorine, who's period, group, and atomic number are 2, 17, and 9.

Answer:

190+2=192

Explanation:

192 add it 192 added

Answer: they are right

Explanation:

The molar mass of h2x is 222.22 g/mol

H2X + 2NaOH  → Na2X + 2H2O

Mole NaOH = concentration × volume

                    = 0.450 × 44.2 × \(10^{-3}\)

                    = 0.01989mol

Mole H2X = 0.01989 / 2 = 0.0099mol

H2X and NaOH has 1 : 2 molar ratio

Molar mass = mass / mole =2.20/0.0099 = 222.22 g/mol

A chemical compound's molar mass is calculated by dividing its mass by the number of moles measured in moles that make up the sample of that compound. In contrast to molecular properties, a substance's molar mass is a bulk property. The comp0und is present in many different forms, each with a different mass as a result of the isotopes. The mlar mass represents the average of these masses. The molar mass is most frequently calculated from the standard atomic weights and is a function of the relative abundance of the constituent atoms' isotopes on Earth. It is thus a terrestrial average. The conversion betwen a substance's mass and amount can be done using the molar mass.

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As an AI text-based bot, I'm unable to draw images or upload file attachments. However, I can help you understand how to draw the peptide sequence FDEGV from the N-terminus to the C-terminus.

1. The peptide sequence is represented by the single-letter codes of amino acids: F (Phenylalanine), D (Aspartic Acid), E (Glutamic Acid), G (Glycine), and V (Valine).

2. Draw the N-terminus (amino terminus) on the left side, which consists of a free amino group (-NH2).

3. Connect the N-terminus to the first amino acid, Phenylalanine, by drawing its structure. Continue to draw the other amino acids in the sequence (D, E, G, and V), connecting them with peptide bonds. Peptide bonds are formed between the carboxyl group of one amino acid and the amino group of the next amino acid.

4. Draw the C-terminus (carboxyl terminus) on the right side, which consists of a free carboxyl group (-COOH), connected to the last amino acid, Valine.

Remember to label each amino acid and the N- and C-termini. Good luck with your drawing!

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The mass percentage of Cl⁻ in the solution produced when 3.00g of CaCl₂ is dissolved in 100.0mL of water is 1.86 %.

The total mass of the solution which is produced when 3.00g of CaCl₂ is dissolved in 100.0mL of water is determined as follows:

mass of CaCl₂ = 3.0 g

mass of water = density * volume

mass of water = 1.00 g/mL * 100.0 mL

mass of water = 100.0 g

mass of solution = (100.0 + 3.0) g

total mass of solution = 103.0 g

molar mass of CaCl₂ = (40 + 35.5 * 2) g/mol

molar mass of CaCl₂ = 111 g/mol

mass percentage of Cl⁻ in CaCl₂ = 71/111

mass of Cl⁻ present in 3.0 g of CaCl₂ = 71/111 * 3 = 1.92 g

mass percentage of Cl⁻ in the solution = 1.92/103 * 100%

mass percentage of Cl⁻ in the solution = 1.86 %

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Answer:

b and crusil is the right

Answer

Answer: In the photosystem II (PSII) reaction center, energy from sunlight is used to extract electrons from water. Explantion: The electron transport chain moves protons across the thylakoid membrane into the lumen.

The first indirect effect of aerosols is the increase in cloud albedo. The sign of its radiative forcing is negative.

Aerosols play a major role in the earth's climate by scattering and absorbing solar radiation and modifying the microphysical and radiative properties of clouds. The first indirect effect of aerosols is the increase in cloud albedo.The albedo effect happens when radiation from the sun reflects off the planet and back into space. Clouds act as mirrors and reflect much of the sun's radiation back into space, making the Earth cooler. Aerosols increase cloud albedo, reflecting more radiation back into space, and causing the Earth's temperature to decrease. The sign of the radiative forcing of the first indirect effect of aerosols is negative.

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Answer: 4.33333.... hours

Explanation: 600 mph, 2600/600 = 4.33

Answer:

Forensic drug chemists analyze samples of unknown materials including powders, liquids and stains to determine the chemical identity or characteristics of the compounds that make up the sample. samples submitted as evidence in a drug-related case can contain one compound or a mixture of many compounds.

Answer:

A. intermolecular forces

Answer: A. Intermolecular forces

Explanation: A P E X:L E A R N I N G

Answer:

In everyday life, changing the speed of a moving object will change its velocity. The other values, such as acceleration, momentum, and mass, will not be affected.

The canister contains approximately 0.0331 moles of gas.

We can use the Ideal Gas Law to solve this problem:

PV = nRT

where P is the pressure of the gas, V is its volume, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature of the gas in Kelvin.

First, we need to convert the pressure from atm to Pa and the volume from L to \(m^3\)

P = 0.750 atm x 101325 Pa/atm = 75993.75 Pa

V = 0.859 L x (1 \(m^3\)/1000 L) = 0.000859 \(m^3\)

Next, we need to convert the temperature from Celsius to Kelvin:

T = 176°C + 273.15 = 449.15 K

Now we can substitute these values into the Ideal Gas Law:

n = PV/RT

= (75993.75 Pa)(0.000859\(m^3\))/(8.3145 J/(mol·K))(449.15 K)

n ≈ 0.0331 mol

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Answer:

This all should be correct:

c

a

c

a

Answer:

C, A, B, B

Explanation:

Question 1: C. inner core

Why? Because the inner core is literally the center of the Earth. Meaning it is the hottest part of the Earth.

Question 2: A. crust

Why? The crust is the outer most layer which is the layer we walk on so to speak. The Earth can be broken up into four layers and as said before the crust is the outer part of it. It is actually amounts to less than 1% of Earth's volume.

Question 3: B. basalt

Why? If we were to average the oceanic crust we would get something around six kilometers and this is the thickness. This is mostly made up of basalt.

Question 4: B. outer core

Why? Due to difference in pressure and temperature the outer core tends to release dense matter which sinks while warm (less dense rises). This causes the Coriolis force, resulting from the Earth's rotations.

Answer:

Mass of MgF₂ formed = 40.5 g

Explanation:

Given data:

Mass of NaF = 55 g

Mass of MgF₂ formed =  ?

Solution:

Chemical equation:

2NaF  +  Mg      →     MgF₂ + 2Na

Number of moles of NaF:

Number of moles = mass/molar mass

Number of moles = 55 g / 41.98 g/mol

Number of moles = 1.3 mol

now we will compare the moles of sodium fluoride with magnesium fluoride.

                     NaF       :          MgF₂

                       2          :             1

                     1.3          :        1/2×1.3 =  0.65 mol

Mass of magnesium fluoride:

Mass = number of moles × molar mass

Mass = 0.65 mol × 62.3 g/mol

Mass = 40.5 g

Answer:

The brand new Convection Cells Gizmo uses a sophisticated math model to generate simulated convection cells in a beaker of liquid held over a burner. Students can adjust the location and intensity of the heat source and the viscosity of the liquid. A second heat source can be added if desired as well.

Explanation:

I hope this helps you!!

Okonkwo's reaction to Obiageli breaking the pot was in line with his character, valuing strength and punishing harshly. His tragic flaw and adherence to tradition explain any expected discrepancies.

In Chinua Achebe's novel "Things Fall Apart," when Obiageli broke the pot, Okonkwo reacted with anger, scolding her and her mother, hitting Obiageli with a stick, and then retiring to his hut without eating dinner. This reaction was in line with Okonkwo's character, who valued strength and saw any show of weakness as a failure. In his mind, Obiageli's action was careless and thoughtless, and he felt it was his duty to correct her behavior.

However, one might expect Okonkwo to react differently, given that Obiageli was only a child and that breaking a pot was not a grave offense. One might expect him to show more patience and understanding, perhaps gently correcting her mistake and using it as a teaching moment.

This discrepancy can be explained by Okonkwo's tragic flaw, which is his inability to control his emotions and his tendency to resort to violence to solve problems. Additionally, his strict adherence to traditional customs and beliefs also influenced his reaction, as he believed that harsh punishment was necessary to maintain order and discipline within the community.

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Complete question:

In Chinua Achebe's novel "Things Fall Apart," when Obiageli broke the pot, Okonkwo reacted by harshly scolding her and her mother, hitting her with a stick, and then retiring to his hut without eating dinner.

When obiageli broke the pot, how did Okonkwo react and how did you expect him to react? how do you account for any discrepancies?

Answer:

The group that tests the variable.

Explanation:

The group that tests the variable is a control group.

Answer:

C when testing the group put the varible in control

Answer:

Because your smell sence is stronger than the others

Explanation:

Answer/Explanation:

Everyone is different and some people have a batter sense of smell than others causing them to smell before them. If that is what you are asking.

I hope this helps :)