Which of the following is always on the right side of an equation for radioactive decay? A. A stable element B. A daughter element C. A parent element D. A radioactive element


i want to say its parent element but im not sure :(​

Answer:

B) the rabies viru

Explanation:

Answer:

ionic compound

Explanation:

When two ions come together to form a compound, they form an ionic compound. Ionic compounds are made up of positively charged ions (cations) and negatively charged ions (anions) that are held together by electrostatic attraction.

For example, sodium chloride (NaCl) is an ionic compound formed when a sodium ion (Na+) and a chloride ion (Cl-) come together. The sodium ion loses an electron to become a positively charged ion, while the chloride ion gains an electron to become a negatively charged ion. The oppositely charged ions attract each other, forming a crystal lattice structure.

Other examples of ionic compounds include magnesium oxide (MgO), potassium iodide (KI), and calcium carbonate (CaCO3).

Explanation:

During the three hours, a heat flow took place from the boiling water to both the copper and aluminum cubes, as the water was at a higher temperature than the room-temperature cubes. However, the direction of heat flow between the two cubes depends on their respective thermal conductivities, specific heat capacities, and initial temperatures, which are not provided in the question. Therefore, the correct answer cannot be determined based on the information given.

Answer:

from the boiling water to the aluminum cube

Explanation:

: )

To draw the partial orbital picture of CH2 (singlet methylene carbene) and include p-orbital, lone pair orbital, three-dimensional geometry, and hybridization, follow these steps:

1. Draw the carbon atom at the center, with two hydrogen atoms bonded to it in a V-shape. This indicates the molecule has a bent structure.

2. For hybridization, the carbon atom is sp2 hybridized. This means that one s-orbital and two p-orbitals on the carbon atom have mixed to form three sp2 orbitals.

3. Arrange the three sp2 hybrid orbitals in a trigonal planar geometry around the carbon atom, with bond angles of approximately 120 degrees. Connect one sp2 orbital to each hydrogen atom, and one sp2 orbital will have a lone pair of electrons.

4. The remaining p-orbital on the carbon atom, which is perpendicular to the plane of the molecule, will be unhybridized and empty.

So, the partial orbital picture of CH2 (singlet methylene carbene) shows a carbon atom with a bent geometry, sp2 hybridization, and an empty p-orbital perpendicular to the plane of the molecule. The carbon atom is bonded to two hydrogen atoms, and there is a lone pair of electrons in one of the sp2 orbitals.

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Answer:

The moment magnitude scale is a scale that rates earthquakes by estimating the total energy released by an earthquake . Estimating the total amount of energy released, enables comparison of earthquakes more accurately.

Answer:The moment magnitude scale is a scale that rates earthquakes by estimating the total energy released by an earthquake . Estimating the total amount of energy released, enables comparison of earthquakes more accurately.

The hydrogen ion concentration of a solution of ammonia depends on the concentration of the hydroxide ions in the solution.

The hydrogen ion concentration of a solution of ammonia with a hydroxide ion concentration of 6.25 x 10-8 mol/L can be calculated using the equation Kw = [H+] [OH-], where Kw is the ion product constant for water. Using this equation, [H+] can be calculated by rearranging to [H+] = Kw/[OH-] and substituting the given values. This gives [H+] = 1.0 x 10-14/6.25 x 10-8, which equals 1.6 x 10-7 mol/L. Therefore, the hydrogen ion concentration for the given solution of ammonia is 1.6 x 10-7 mol/L.

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Answer:

meter. 1.5×10^-6

Litter. 2×10^-5

Kilo Gram. 1.7

Kilo Gram. 3.4 ×10^-3

I hope you understood that and if you don't understand write in comments

Answer:

Explanation:

The reasons that cities boomed during the Middle Ages are more employment opportunities, increased trade, and growing interest in culture and art.

Answer:

Explanation:

By the High Middle Ages, towns were growing again. One reason for their growth was improvements in agriculture. Farmers were clearing forests and adopting better farming methods. As a result, they had a surplus of crops to sell in town markets.

Also, as the amount of trade increased between Europe and other continents. Trade began to grow in Europe after the Crusades. Most of this trade was controlled by merchants from Italy and Northern Europe.

To determine the pH of the buffer solution, we need to consider the acid-base equilibrium between acetic acid (CH3COOH) and its conjugate base acetate (CH3COO-) in water.

Part A:

First, let's calculate the concentration of acetic acid (CH3COOH) in the solution.

Given:

Volume of acetic acid solution = 500 mL = 0.5 L

Molarity of acetic acid solution = 0.145 M

Concentration of acetic acid (CH3COOH) = Molarity × Volume

Concentration of acetic acid = 0.145 M × 0.5 L = 0.0725 moles/L

Now, let's calculate the concentration of sodium acetate (CH3COONa) in the solution.

Given:

Mass of sodium acetate (CH3COONa) = 21.0 g

Molar mass of sodium acetate (CH3COONa) = 82.03 g/mol

Volume of sodium acetate solution = 500 mL = 0.5 L

Concentration of sodium acetate (CH3COONa) = (Mass / Molar mass) / Volume

Concentration of sodium acetate = (21.0 g / 82.03 g/mol) / 0.5 L = 0.255 moles/L

The buffer solution contains acetic acid and sodium acetate in the following molar ratio: 1:1.

The Henderson-Hasselbalch equation for the pH of a buffer is:

pH = pKa + log ([A-]/[HA])

The pKa of acetic acid is 4.74.

Substituting the values into the Henderson-Hasselbalch equation:

pH = 4.74 + log (0.255/0.0725)

pH = 4.74 + log (3.5172)

pH ≈ 4.74 + 0.546

pH ≈ 5.29

Therefore, the pH of the buffer is approximately 5.29.

Part B:

When a few drops of hydrochloric acid (HCl) are added to the buffer, the following reaction occurs:

CH3COOH (aq) + H+ (aq) → CH3COOH2+ (aq)

In this equation, the acetic acid (CH3COOH) acts as a weak acid and donates a proton (H+) to form the hydronium ion (CH3COOH2+).

Part C:

When a few drops of sodium hydroxide (NaOH) solution are added to the buffer, the following reaction occurs:

CH3COOH (aq) + OH- (aq) → CH3COO- (aq) + H2O (l)

In this equation, the hydroxide ion (OH-) from the sodium hydroxide reacts with the acetic acid (CH3COOH) to form acetate ion (CH3COO-) and water (H2O).

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Answer:

D.

Explanation:

I assume its D because the controlled variable is what is kept the same throughout the experiment.

Answer: C. Increase the concentration of Mg in the reaction mixture.

Explanation: I got this right on Edmentum.

An accurate step in the procedure to name a binary molecular compound using IUPAC nomenclature rules is to; End the name of the second element with the suffix-ided.

What is IUPAC ?

The International Union of Pure and Applied Chemistry is reffered as IUPAC. It is a global scientific organization that establishes guidelines for chemical nomenclature, terminology, measurements, and symbols. IUPAC also publishes international recommendations for chemical safety and environmental protection and provides guidance on the use and application of chemical research.

What does Binary means?

Binary is a base-two number counting, calculating, and representation system. This means that, unlike the decimal system (base 10), which counts in tens, binary counts in powers of two. Binary numbers are made up of only two digits, 0 and 1, and each digit is known as a "bit." Binary is used to represent data and perform calculations in computing and electronic systems.

Therefore the correct option is C. End the name of the second element with the suffix-ided.

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Answer:

c. 800 K, 0.1 atm

Explanation:

Good luck in AP Chem

Quadratic equation is a polynomial equation of the second degree.

The term quadratic equation refers to an equation of the type ax^2 + bx +c. It is a polynomial of degree 2. The highest power of x therein is only 2.

The question is incomplete hence we can't really tell which of the  pair of functions in which the exponential is consistently growing at a faster rate than the quadratic over the interval.

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Answer:C

Explanation:

Stir to facilitate the reaction, Wait wait for the reaction to finish.

what was copper ?

Copper (Cu) is a chemical element that is a reddish, extremely ductile metal in Periodic Group 11 (Ib) that is an unusually good conductor of electricity and heat. Copper is found in nature in its free metallic state. This native copper was initially utilised as a replacement for stone by Neolithic (New Stone Age) people around 8000 BCE. Metallurgy began in Mesopotamia when copper was cast into moulds (c. 4000 BCE), reduced to metal from ores using fire and charcoal, and purposely alloyed with tin as bronze.

Exact measurements of reactants are required.

Stir to facilitate the reaction.

Wait wait for the reaction to finish.

Ensure that as much copper as feasible is recovered.

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Answer:

Measure reactants precisely.

Stir to help the reaction take place.

Wait patiently until the reaction completes.

Make sure to recover as much copper as possible.

Explanation:

edge

Answer:

See Below.

Explanation:

This is a conversion problem:

Using the molar mass of Gold (given in a periodic table) which is 196.97g/mol

you have

\((3.60*10^-5 g) *\frac{1moles}{196.97g}\)

you always arrange the equation in a way to cancel whatever you don't want (grams) and leave what you do want (moles). Here grams cancel (top and bottom), so you're left with:

\(\frac{(3.60*10^-5 g) *(1)}{196.97} = 1.83*10^-7\) moles of Gold

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.

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Investing   :

"I'm considering investing in equities."

"I need a system for handling my finances."

"I need to put money away for the future."

No Investment :

"My knowledge of investment is limited."

"I am unable to purchase stocks."

"I don't particularly enjoy taking chances."

Explanation:

These are accurate because I recently completed the course that taught me these things.

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Answer:

some of the energy is lost entirely

Explanation:

Answer:  Average atomic mass of an element is the summation of the masses of its isotopes, each multiplied by its natural abundance.

Average atomic mass = A₁M₁ + A₂M₂ +… + AnMn

Average atomic mass of element X is 13.9790 amu.

Explanation:

Average atomic mass = A₁M₁ + A₂M₂ +… + AnMn)

where, A is % abundance and M is atomic mass of element

To find : average atomic mass of element X

Let's take abundance of each isotopes as;

Abundance of X-14 = 99.636% = 0.99636

Abundance of X-15 = 0.364% = 0.00364

As per given data, atomic mass of the element X-14 is 14.003 and

X-15 15.000 amu.

As per given formula: we get,

Avg. atomic mass = (14.003)*(0.99636) + (15.000)*(0.00364)

Calculating this expression gives us:

So, Avg. atomic mass = 13.92445 + 0.0546 = 13.97905 amu

Ariana is playing basketball with her friends. They are using an orange basketball. Because all visible light waves except orange are absorbed by the ball.

The correct answer is A.

The correct answer is A.

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One of the four general catalytic methods used by serine proteases is catalysis by approximation.

Endo proteases come in several forms, including serine proteases. They are, nonetheless, quite common in both prokaryotes and eukaryotes. Protease A, a chymotrypsin-like protease from Stremptomyces griseus, has a primary sequence very different from chymotrypsin, but its overall tertiary structure is very similar to chymotrypsin.

The positions of the catalytic triad amino acids in the primary sequences of the protein are very similar, indicating that the genes for the proteins diverged from a common precursor gene. B. subtilisin, a serine protease, in contrast, Subtilis shares only a small amount of tertiary structural homology with chymotrypsin. But when folded, it also possesses a catalytic triad (Ser 221 - His 64 - Asp 32) akin to chymotrypsin's (Ser 195 - His 57 - Asp 102).

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Answer:

matter

Explanation:

Answer:

All waves carry energy

"There is not enough oxygen in space to support life," is the right response.

The short answer is that oxygen is brought from Earth by astronauts and cosmonauts (a Russian astronaut), and that oxygen is created by passing electricity through water. (this is called electrolysis). On the Space Station, both the air and the water were initially imported from Earth.

Typically, astronauts restrict their bodies in a small sleeping compartment or sleeping bag while they are sleeping. Since there is nearly no gravity in space, there is no such thing as up or down like there is on earth. Astronauts are able to sleep anyplace since any surface can serve as a floor, wall, or ceiling.

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